Domestic gas commonly used is divided into four categories: natural gas, liquefied petroleum gas, artificial gas and liquefied petroleum gas and air mixture, in which the smallest corrosive gas, liquefied petroleum gas followed, corrosion is the biggest artificial gas, artificial coal gas harmful substance is mainly sulfur dioxide, naphthalene, coal tar and so on.
Natural gas valve materials can be used without special requirements, if you use ordinary carbon steel, be sure to do surface treatment to prevent rust. However, in the use of artificial valve on the gas is best not to use ordinary copper, which, after contact with water into a copper sulfate and sulfur dioxide on the corrosion of parts much. I should say yes; artificial gas in the valve, pipe very easy to knot Naphthalene is a white crystalline, hard, not easy to get rid of, affecting the valve closing and opening. Kick into gear in the coal tar sticky valves, tubes everywhere, very difficult to clean up. At present, there is no good solution.
Gas valve with artificial valves can be used with low pressure cast iron, ductile iron pressure medium can be used, can be used with high pressure cast stainless steel (316). Best not to use regular steel. The rubber diaphragm pneumatic valve chamber housing is best not to use steel stamping structure that must use the internal need to do more advanced surface treatment (such as: nickel-phosphorus plating, etc.). ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve ball valve V Type Ball Valve
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Wednesday, October 27, 2010
Saturday, October 9, 2010
Zhejiang Yuhuan plant Chu civilian air valve open the valve 1 days
Chu Feng, Zhejiang Yuhuan valve plant operating in the market in recent years, on the one hand the attention of civil valve of the new changes in the market to adapt to civilian increase family incomes and living conditions improved towards the quality of civil valve, multi - functions, such as the pursuit of direction of development of civil valve products have been increased, and constantly develop new products to satisfy market needs; on the other hand, are good at opening up markets, and strive to do a good job in business to work more to broaden the market. Today, "Chu Feng card" civil valves are sold all over the country, and markets in major cities across the country set up a distribution point, effectively expanding the market face, into the tens of thousands of households, "Chu-style" business is growing stronger, Chu wind plant at the same time has also been rapid growth, China's valve industry has a strong civilian strength of private enterprises.
Located in the southeast coast of Zhejiang Gold coast, the south port city of Wenzhou, State Road 104 west from Huangyan Airport, Wenzhou airport in close proximity, land, sea and air transportation is very convenient Chu Feng Zhejiang Yuhuan valve is factory specializing in product development, production, sale and service businesses, have a first-class production equipment and professional engineering and technical personnel, product selection of quality materials at home and abroad, the use of advanced manufacturing technology and production equipment, production of civilian implementation of the specialized valve , serialization, multi-species, attributed to the quality of each year a lot of high-quality products to enter the market. Chu Feng Yuhuan valve production plant is currently the main valve: ball valve, pipe fittings, pipe joints, Angle Valves, check valve, globe valve, industrial valves, Tap series, valve and other products. And manufacturing of water valves for the main feature of this theme based on scientific and technological innovation, and constantly develop new products to meet the development needs of the market. Not only that, they insist on honest services, to meet the needs of the market and users.
Recently the plant according to market demand, in addition to the original 1 / 2 "Bronze Angle Valves, 1 / 2" -4 "Bronze Gate Valve, 1 / 2" -2 "copper gate valve, 1 / 2" -4 "Ball Valve, 1 / 2 "-4" Bronze Check Valve, 1 / 2 "-1" Copper Tap, 1 / 2 "-4" Bronze Check Valve, 1 / 2 ", 3 / 4" Long Body Tap and other varieties, the new launch of the 1 / 2 "E Bronze Angle Valves, 1 / 2" Bronze Angle Valves series products, now the family at any time to meet the needs of renovation. as far as possible to meet the requirements throughout the supply dealer.
The company has always adhered to the "user first, quality first" business policy, the product to "high-quality, high efficiency, development", continuously improved and updated; based on the present, far future, will be strict management, superior quality , integrity of services to customers return.
We can offer more Knife Gate Valve Information.If you need us according your spcification to produce the Knife Gate Valve .
Need, please e-mail to valve401@gmail.com
Located in the southeast coast of Zhejiang Gold coast, the south port city of Wenzhou, State Road 104 west from Huangyan Airport, Wenzhou airport in close proximity, land, sea and air transportation is very convenient Chu Feng Zhejiang Yuhuan valve is factory specializing in product development, production, sale and service businesses, have a first-class production equipment and professional engineering and technical personnel, product selection of quality materials at home and abroad, the use of advanced manufacturing technology and production equipment, production of civilian implementation of the specialized valve , serialization, multi-species, attributed to the quality of each year a lot of high-quality products to enter the market. Chu Feng Yuhuan valve production plant is currently the main valve: ball valve, pipe fittings, pipe joints, Angle Valves, check valve, globe valve, industrial valves, Tap series, valve and other products. And manufacturing of water valves for the main feature of this theme based on scientific and technological innovation, and constantly develop new products to meet the development needs of the market. Not only that, they insist on honest services, to meet the needs of the market and users.
Recently the plant according to market demand, in addition to the original 1 / 2 "Bronze Angle Valves, 1 / 2" -4 "Bronze Gate Valve, 1 / 2" -2 "copper gate valve, 1 / 2" -4 "Ball Valve, 1 / 2 "-4" Bronze Check Valve, 1 / 2 "-1" Copper Tap, 1 / 2 "-4" Bronze Check Valve, 1 / 2 ", 3 / 4" Long Body Tap and other varieties, the new launch of the 1 / 2 "E Bronze Angle Valves, 1 / 2" Bronze Angle Valves series products, now the family at any time to meet the needs of renovation. as far as possible to meet the requirements throughout the supply dealer.
The company has always adhered to the "user first, quality first" business policy, the product to "high-quality, high efficiency, development", continuously improved and updated; based on the present, far future, will be strict management, superior quality , integrity of services to customers return.
We can offer more Knife Gate Valve Information.If you need us according your spcification to produce the Knife Gate Valve .
Need, please e-mail to valve401@gmail.com
Key technical performance of the valve
Strength properties
Strength properties of the valve is the valve to withstand medium pressure capacity. Withstand the internal pressure valve is a mechanical product, and therefore must have sufficient strength and rigidity to ensure the long-term use without breakage or deformation.
Sealing
Valve valve sealing performance is part of the sealing ability to prevent media leaks, it is the valve of the most important technical performance indicators. Valve sealing parts are three: open and close the two pieces with the valve seat sealing surface contacts between the Office; filler stem and the stuffing of the distribution and the Branch; body junctions with the valve cover. Of which the first one is called the leakage of internal leakage, which is commonly known as Guan lax, it will affect the media's ability to cut off the valve. For the cut valve, the internal leakage is not allowed. Leakage after the two called the leakage, that is, medium leaking into the valve from the valve outside. Leakage would cause material loss, environmental pollution can also cause serious accidents. For flammable and explosive, toxic or radioactive medium, leakage is inadmissible and, therefore, the valve must have a reliable sealing performance.
Mobile Media
Medium flows through the valve would cause pressure loss (both before and after the valve pressure difference), that is, the flow valve on the media have a certain resistance, medium to overcome the resistance of the valve is necessary to consume a certain energy. From the conservation of energy considerations, the design and manufacture of valves, it is necessary to minimize the resistance of the valve on the flow medium.
Headstock headstock force and torque
Hoisting force and hoisting moment is to open or close the valve that must be imposed by force or torque. Close the valve, the need to open and close with the Coma Berenices two pieces of the sealing surface of the seal formed between certain specific pressure, while also overcoming the stem and the packing between the stem and the nut thread between the stem end bearing at and other friction parts of the friction, which must be imposed by a certain closing force and closing moments, the valve in the open and close the process, the required hoisting hoisting force and moment of change, and its maximum is close to the final instant or open the initial transient. The design and manufacture of valves should be sought to reduce the closing force and closing moments.
Hoisting Speed
Hoisting speed is used to open or close the valve to complete a movement to represent the time required. Valves open and close speeds generally no strict requirements, but some conditions the speed of the hoist have special requirements, if any, the prompt to open or closed, to prevent an accident, and some require slow and shut down to prevent the resulting water hammer, etc. , which should be considered in selection of valve type.
Action sensitivity and reliability of
This refers to the valve for the medium parameters change, the sensitivity of the response accordingly. For the throttle valve, reducing valve, regulating valve used to adjust the medium parameters of the valves, as well as safety valves, steam trap with a specific function such as valves, its function is very important to the sensitivity and reliability of the technical performance indicators.
Life
It is said that the durability of the valve is a valve key performance indicators, and has great economic significance. Usually able to ensure that the number of seals required to open and close that can also be used to indicate the use of time. ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve ball valve V Type Ball Valve
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Strength properties of the valve is the valve to withstand medium pressure capacity. Withstand the internal pressure valve is a mechanical product, and therefore must have sufficient strength and rigidity to ensure the long-term use without breakage or deformation.
Sealing
Valve valve sealing performance is part of the sealing ability to prevent media leaks, it is the valve of the most important technical performance indicators. Valve sealing parts are three: open and close the two pieces with the valve seat sealing surface contacts between the Office; filler stem and the stuffing of the distribution and the Branch; body junctions with the valve cover. Of which the first one is called the leakage of internal leakage, which is commonly known as Guan lax, it will affect the media's ability to cut off the valve. For the cut valve, the internal leakage is not allowed. Leakage after the two called the leakage, that is, medium leaking into the valve from the valve outside. Leakage would cause material loss, environmental pollution can also cause serious accidents. For flammable and explosive, toxic or radioactive medium, leakage is inadmissible and, therefore, the valve must have a reliable sealing performance.
Mobile Media
Medium flows through the valve would cause pressure loss (both before and after the valve pressure difference), that is, the flow valve on the media have a certain resistance, medium to overcome the resistance of the valve is necessary to consume a certain energy. From the conservation of energy considerations, the design and manufacture of valves, it is necessary to minimize the resistance of the valve on the flow medium.
Headstock headstock force and torque
Hoisting force and hoisting moment is to open or close the valve that must be imposed by force or torque. Close the valve, the need to open and close with the Coma Berenices two pieces of the sealing surface of the seal formed between certain specific pressure, while also overcoming the stem and the packing between the stem and the nut thread between the stem end bearing at and other friction parts of the friction, which must be imposed by a certain closing force and closing moments, the valve in the open and close the process, the required hoisting hoisting force and moment of change, and its maximum is close to the final instant or open the initial transient. The design and manufacture of valves should be sought to reduce the closing force and closing moments.
Hoisting Speed
Hoisting speed is used to open or close the valve to complete a movement to represent the time required. Valves open and close speeds generally no strict requirements, but some conditions the speed of the hoist have special requirements, if any, the prompt to open or closed, to prevent an accident, and some require slow and shut down to prevent the resulting water hammer, etc. , which should be considered in selection of valve type.
Action sensitivity and reliability of
This refers to the valve for the medium parameters change, the sensitivity of the response accordingly. For the throttle valve, reducing valve, regulating valve used to adjust the medium parameters of the valves, as well as safety valves, steam trap with a specific function such as valves, its function is very important to the sensitivity and reliability of the technical performance indicators.
Life
It is said that the durability of the valve is a valve key performance indicators, and has great economic significance. Usually able to ensure that the number of seals required to open and close that can also be used to indicate the use of time. ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve ball valve V Type Ball Valve
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The manual valve
Valve is equipment, factory equipment, the specification should be marked with the following technical data:
Valve specifications; model; work pressure; manufacturing standards; valve body material; stem material; sealing material; filler material; valves open and close direction; rpm; public pressure conditions headstock maximum torque; Factory Factory Name: factory Date: weight; connecting flange diameter, pore number, the center hole distance, and hope to graphic images indicate length, width, and height control of size; indicate flow resistance coefficient; effectively open and close the number and installation, maintenance, notes, etc. .
2.10 valve Purchasing
Valve manufacturers around the country more than 2,000, Henan Province, more than 100, some manufacturers only a few people's workshop, so the valve manufacturing quality and price great hanging sparse. To this end, strongly urged the parties concerned to rectify the valve manufacturing industry, the establishment of quality licensing system, eliminate inferior products. Procurement valve suggested note the following:?
(1) Do not buy a single factory, shop around.
(2) The purchase of the manufacturers sought to the adoption of the ISO9001 quality system certification of enterprises, and pay attention to whether the products selected by the quality certification of products.
(3) According to the valve uses a different, according to the above discussion of the issues addressed in the argument, which provides a good technical requirements.
(4) The high quality valves and prices are accordingly more expensive, should be based on the general situation of enterprises in the price-performance on the selection of products to meet the business needs, can not be a model, the same price.
(5) The pipe network in the valve open and close are not frequent, but to replace them maintenance, but the loss of economic and social benefits is large, and therefore buy good quality, long-term may from time to overhaul the product is a common aspirations. Ruoyin a variety of reasons, cost performance lowered a bit, then we should focus on after-sales service to consider the timeliness of products.
(6) valve is a device, valve packing should not be ignored, small-caliber valve should strive for container transport, large-diameter valves should be placed on the appropriate packaging, to ensure that the valve in the integrity of long-distance transport. Flange should be added if necessary, block board, protect the sealing surface of the material does not change much.
(7) A number of water companies on the procurement of the disintegration of check valves must be appropriate to re-pressure test inspection, substandard products, non-payment measures, has a certain role, there is no family products can be found in that exemption The.
(8) valve should be kept in public coffers, if the large diameter valves can not be placed in the Treasury, the open-air display also should pay attention to the bottom of the drainage, the top should be covered, should never be exposed to the sun and rain. Study found that many manufacturers to create a new valve has been placed in the open sun and rain, valves using the unit also is the case, it must be corrected.
2.11 valve assembly
(1) The valve and pipe connections
In order to facilitate the valve of the Assembly and Disassembly, generally the side of the installation of valves and pipes to connect to the retention expansion joints, and some of the valves for the DN ≤ 400mm disc with single-axis device (live flange) instead of retention expansion bend. At present, some valve manufacturers have expansion joints with a retention valve products, is to be welcomed, but the price than the price of the valve plus the expansion bend even higher is not very reasonable to promote the use of its influence.
(2) The valve is inappropriate to enter the site
Pipeline construction is a long process, the construction is responsible for supply of materials often worry about problems, put the valve starts ancillary facilities such as the site received, even by a one-time installation Stake transported to the site, so that valve put in a few months sun and rain at the site, no supervision, problems will not easily emerge.
The proposed pipeline construction process, with the double-flat alternative to tube connected, pending completion of pipeline construction, pipe and valve wells masonry cleaning debris after (Inoue precast reinforced concrete panels are not covered), and then transported to the site one by one valve installation in place, and then complete the puzzle of the finishing well. Beijing Water Company to install large-diameter valves is to take such measures, worth learning from.
(3) The valve assembly after the test
Valve supervisory personnel in the valve site inspection after assembly to deal with assembly to inspect to see if it meet the drawing requirements; whether the operation and management needs; hoist inspection, open and close reading the instructions and the actual situation is in line headstock; hoist switch whether the number in line with the instructions; large-diameter pipe should penetrate into the tube inspection and cleaning sealing surface; and ready acceptance of records, the establishment of a good valve technical files.
2.12 Valve operation and management of
Valve can open and close well, not only to selection of the right valve, the product of good quality, well construction and installation, but also thoughtful management can act as "maintaining an army for a thousand days, military forces temporary" effect.
Good operation and management is reflected in the following three aspects:
Technical information available; valve operation and management of thoughtful; valve wells in good condition.
(1) of the valve technical data
Valve technical information, including the valve factory specifications; valves inspected and after the purchase of a single; valve assembly and the location of the card; valve maintenance record. For the street changes, the valve card should be up to date, sought to establish GIS management systems.
(2) valve operation and management of
Valve operation and management of the quality requirements, including the valve should be closed tightly or basic tight; the valve shaft at no filler rod seal leakage string; valves open and close light, instructions intact. Valve operation and management of daily work, including the valves open and close operation of the previous orders for approval records and operational records of the system; valves open and close regular weekly inspection of the records. Not ever for long-term operation of the valve, according to the size of caliber, a different set of weekly inspection cycle is necessary, normally only open and close the activities of a few pick up switch, to be completely shut down operations are prudent. Found that the failure to be put forward for the corresponding medium and large repair plans, the timely processing, in particular, could not be opened after the closure of the valve should be the same as for emergency repairs to burst pipes deal.
(3) The valve shaft position
Well conditions include valve shaft valve masonry meets the design requirements; covers non-destructive and the road of convergence intact; operation of the valve hole is accurate; wells without debris and sewage; valve surface, no rust spots. As the valve wells is a confined space, easy to form oxygen, carbon dioxide levels rise, once the maintenance staff not to strong downhole operations before the blast, ventilation and other measures, easy to endanger human life. When conditions permit, the large-diameter wells to the air valve shaft should be considered the technical measures for long-term convection is better. For the valve shaft shall regularly patrol show, buried in the timely processing of pressure problems, for the covers lost, damaged, repair burst pipes, as the same shall be dealt with urgently.
Wuhan water companies to the valve on the pipe network management as the device management requirements, the use of GPS satellite positioning system, the establishment of valve wells coordinate data, check the rules proposed assessment and scoring criteria, and strengthening management measures are worth the same industry in future.
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Friday, October 8, 2010
Experts: the classification according to different selection of a reasonable valve (b)
The principle of the structure of butterfly valve is particularly suitable for the production of large diameter valves. Butterfly not only in oil, gas, chemical, general industrial water treatment is widely used, but also applies to thermal power plant cooling water systems.
Butterfly valves are commonly used for clip-on butterfly valve and two Flanged butterfly valve. Clip-on butterfly is double-headed bolts to connect the valve between the two pipe flange, flange type butterfly valve is a valve on the flange, the bolts on both ends of the valve in the pipe flange connection method Lan on.
Ball
Ball is evolved by the stopcock. It has the same 90-degree rotation to action, unlike the faucet body is a sphere, a circular through-hole or channel through its axis. Spherical and the proportion of openings should be such that when the ball 90-degree rotation, in imports and exports should all show spherical, thus cutting off the flow.
Ball only about 90 degrees rotation of the rotating operation and a small torque can be closed tightly. Full equality for the medium of the body cavity to provide a little resistance, through the flow channel. Ball valve is generally believed that the most appropriate use of direct opening and closing, the recent development has been designed as a ball valve so that it flows with the expenditure and control purposes. Ball is in itself the main features of compact structure, easy operation and maintenance, applicable to water, solvents, acid and gas, such as working media in general, but also applicable to the work of the medium conditions, such as oxygen, hydrogen peroxide, methane and ethylene and so on. Ball Valve can be a whole can also be modular.
Selected by the valve to prevent the media back
This type of valve is to allow only one direction to the flow of media, but also to prevent the flow direction. This valve is usually the work automatically, in a direction of flow of fluid under pressure, open the valve; fluid flowing in the opposite direction, fluid pressure and the valve from the valve since the role of coincidence in the valve seat, thereby cutting off the flow. Non-return valve which belongs to this type of valve, which includes Swing Check Valve Check Valve and the take-off and landing. Swing Check Valve bodies are ordinary hinge, there is a door the same as the free flap valve against the valve seat sloping surface. In order to ensure that every valve seat surface to reach the appropriate position in the valve hinge design in order to have a valve Swing have sufficient space and the real valve, all-round contact with the valve seat. Valve could be made of metal can also be embedded in the metal on leather, rubber, or synthetic coverage, depending on the use of performance requirements. Swing Check Valve fully opened in the circumstances, almost unimpeded fluid pressure, so the pressure drop through the valve is relatively small. Take-off and landing flap-type check valve is located at the valve seat sealing surface of the body. In addition to this valve valve is free to take-off and landing, the other part as the same cut-off valve, fluid pressure valve lift from the valve seat sealing surface, leading to medium return valve to the valve seat down, and cut off the flow. Under the conditions of use, valve can be all-metal structure can also be rack mounted in the valve rubber mat or rubber ring form. The same as the cut-off valve, fluid movements through the channel-type check valve is narrow, and therefore through the movements of the pressure drop Check Valve Swing Check Valve than larger, and Swing Check Valve flow restrictions rarely.
Parameters selected by the media regulator valve
In the production process, in order for the pressure medium, the flow in line with the process parameters such as the requirements of regulating agencies need to regulate the above-mentioned parameters. Regulation of the main working principle of agency, by changing the valve with the valve flap valve and the flow area between valve seat to achieve the purpose of adjusting the above parameters. Such valves are collectively referred to as control valves, which rely on the media into the drive itself is called self-drive-style control valves, such as relief valve, regulator valve and so on, leading up any power-driven (such as electricity, compressed air and fluid dynamics), he referred to as drive control valve, control valve, such as electric, pneumatic and hydraulic control valve, such as regulating valve.
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Butterfly valves are commonly used for clip-on butterfly valve and two Flanged butterfly valve. Clip-on butterfly is double-headed bolts to connect the valve between the two pipe flange, flange type butterfly valve is a valve on the flange, the bolts on both ends of the valve in the pipe flange connection method Lan on.
Ball
Ball is evolved by the stopcock. It has the same 90-degree rotation to action, unlike the faucet body is a sphere, a circular through-hole or channel through its axis. Spherical and the proportion of openings should be such that when the ball 90-degree rotation, in imports and exports should all show spherical, thus cutting off the flow.
Ball only about 90 degrees rotation of the rotating operation and a small torque can be closed tightly. Full equality for the medium of the body cavity to provide a little resistance, through the flow channel. Ball valve is generally believed that the most appropriate use of direct opening and closing, the recent development has been designed as a ball valve so that it flows with the expenditure and control purposes. Ball is in itself the main features of compact structure, easy operation and maintenance, applicable to water, solvents, acid and gas, such as working media in general, but also applicable to the work of the medium conditions, such as oxygen, hydrogen peroxide, methane and ethylene and so on. Ball Valve can be a whole can also be modular.
Selected by the valve to prevent the media back
This type of valve is to allow only one direction to the flow of media, but also to prevent the flow direction. This valve is usually the work automatically, in a direction of flow of fluid under pressure, open the valve; fluid flowing in the opposite direction, fluid pressure and the valve from the valve since the role of coincidence in the valve seat, thereby cutting off the flow. Non-return valve which belongs to this type of valve, which includes Swing Check Valve Check Valve and the take-off and landing. Swing Check Valve bodies are ordinary hinge, there is a door the same as the free flap valve against the valve seat sloping surface. In order to ensure that every valve seat surface to reach the appropriate position in the valve hinge design in order to have a valve Swing have sufficient space and the real valve, all-round contact with the valve seat. Valve could be made of metal can also be embedded in the metal on leather, rubber, or synthetic coverage, depending on the use of performance requirements. Swing Check Valve fully opened in the circumstances, almost unimpeded fluid pressure, so the pressure drop through the valve is relatively small. Take-off and landing flap-type check valve is located at the valve seat sealing surface of the body. In addition to this valve valve is free to take-off and landing, the other part as the same cut-off valve, fluid pressure valve lift from the valve seat sealing surface, leading to medium return valve to the valve seat down, and cut off the flow. Under the conditions of use, valve can be all-metal structure can also be rack mounted in the valve rubber mat or rubber ring form. The same as the cut-off valve, fluid movements through the channel-type check valve is narrow, and therefore through the movements of the pressure drop Check Valve Swing Check Valve than larger, and Swing Check Valve flow restrictions rarely.
Parameters selected by the media regulator valve
In the production process, in order for the pressure medium, the flow in line with the process parameters such as the requirements of regulating agencies need to regulate the above-mentioned parameters. Regulation of the main working principle of agency, by changing the valve with the valve flap valve and the flow area between valve seat to achieve the purpose of adjusting the above parameters. Such valves are collectively referred to as control valves, which rely on the media into the drive itself is called self-drive-style control valves, such as relief valve, regulator valve and so on, leading up any power-driven (such as electricity, compressed air and fluid dynamics), he referred to as drive control valve, control valve, such as electric, pneumatic and hydraulic control valve, such as regulating valve.
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Monday, October 4, 2010
Domestic and foreign demand valve forecast
Acer to buy in 2008, according to data analysis: China's valve market with the continuous development of science and technology, but also to the high-tech, high-parameter, strong corrosion-resistant, high-life direction. Technology at home and abroad based on the analysis of valve and valve market demand both at home and abroad of the analysis, developed in recent years all sectors of industrial valves and valves with high-tech industry development trend and investment direction. Especially the butterfly valve, check valve, ball valve,gate valve.
1. Oil and gas well-head valve devices.
2. Oil and natural gas valve with long-distance pipeline.
3. Nuclear power with the valve.
4. Offshore Oil with valves.
5. Petrochemical, power with valves.
6. Environmental protection with the valve.
7. Metallurgical valve systems.
8. Alumina industrial valves.
9. Large-scale chemical complete sets of valve devices.
10. Chengjian with valves.
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1. Oil and gas well-head valve devices.
2. Oil and natural gas valve with long-distance pipeline.
3. Nuclear power with the valve.
4. Offshore Oil with valves.
5. Petrochemical, power with valves.
6. Environmental protection with the valve.
7. Metallurgical valve systems.
8. Alumina industrial valves.
9. Large-scale chemical complete sets of valve devices.
10. Chengjian with valves.
We can offer more Knife Gate Valve Information.If you need us according your spcification to produce the Knife Gate Valve .
Need, please e-mail to valve401@gmail.com
Water supply network to choose the valve (b)
5 the quality of the reliability of
A good quality ring valve, the valve manufacturer in the entire process. ① matching the original iron; ② sand mold manufacturing; ③ casting molten iron castings; ④ precision machining. To have a more complete quality guarantee system. Valve of the indicators of the number of little importance, does not have to switch to meet more than 5000 tests. Because the valves in the pipe network is not a regular switch. In some cases, some eight or ten years before switching valve first. In practical work, we discovered that the positioning of the butterfly valve screw is loosened during installation, and some simply do not have丝扣bolts.
6, the flexibility of operation
Whether the flexible valve operation is very important. Operation of flexible, not only in the choice of what kind of drive is also reflected in the transmission mechanism and the components related to the machining accuracy. For example, in the butterfly valve on the drive. There are two transmission methods - lead screw and nut type worm. The general characteristics of screw-type nut switch 2 in the slow middle fast, relatively good, but screw driving force due to the smaller moment, the operator is not easy to master the operation of hoist the extent of the valve, the valve has been prone to shut down operation so that the screw is still distorted, and fracture. And generally easy to worm-based closed-off spaces. At the same time, valve stem seal problems, parts of butterfly valve speed transmission torque and rotation are the matching problem in the valve operation. Therefore, the choice of what kind of drive should be based on the situation of water supply enterprises, and after listening to the views of operators, in close coordination with the manufacturers so that the valve can choose to operate a flexible, can meet the needs of the use and work.
7, the reasonableness of the price
Valve should have a reasonable price, reasonable price is not necessarily the lowest price. If we only focus on the lowest price, it is easy to mislead the manufacturers to sell their products, competing for low prices, even lower than the cost of product sales, the manufacturers in order not to lose money they are bound to be in the process, the jerry-building materials, produced by the valve on the There are quality problems, water pipes used in the Internet, the ultimate loser is the user's own. Therefore, we must pay attention to when in the selection of valves, encourage manufacturers to use value engineering principles, and strengthen the main function to remove redundant features, and optimize the system. Management efforts, efforts in cost accounting. It should be noted that a reasonable price can be the lowest price, but price is not necessarily the lowest reasonable price.
8 guarantee of after-sales service
Valves in the use of the water supply network, there will be all kinds of problems, some are of the valve itself, while others come from external factors destruction, brutal construction, illegal operation, management and use of poor. But for whatever reason, valve problems, will affect the operation of networks, will require manufacturers to accommodate the need for choice in the valve valve manufacturer to have a good after-sales service guarantee. Once the valve problem in the shortest possible time to the scene to solve the problem as soon as possible.
9 order and consistency of supply
Here talked about consistency, refers to the production of valve manufacturers valve products and the need for water supply enterprises in all aspects of the product requirements are the same. This requires that the order side and the supply side (the water supply valve production enterprises and enterprises) joint efforts, not just the efforts of one of the parties. First of all, as a side order of the water supply enterprises, production enterprises in order to when the valve must be in writing, to the valve manufacturer specific technical requirements, which should include the type of valve, the valve should be implemented in different parts of the technical standards and quality standards, the main technical parameters, the various parts of the material, valve type, sealing the form of the requirements of sealing materials, structural forms, connected with the drive and try to pressure and intensity of the technical standards for testing, anti-corrosion and lining the requirements of maximum torque and rotation, assembly and appearance requirements, as well as delivery time, location, number and so on. Valve manufacturers based on orders and technical conditions of the contract, reasonable organization of production, and to ensure that the products produced to meet the order unit (water supply enterprise) the use of the requirements of orders with suppliers to ensure consistency between the two sides.
10 to establish a sound system of inspection and review
When a water supply enterprise, through a series of study, research, and through a range of tests, the final choice of one or several valve manufacturers, its product release to allow water to enter the local market after the permits, it means that for water valves business and manufacturing enterprises has been established between the supply and demand. At the same time, business-to-water supply valve production enterprise to ensure safe, reliable water supply is also the corresponding jointly and severally to assume responsibility. On the one hand, the requirements can be consistently valve manufacturers in accordance with the requirements of water supply companies to provide high-quality products. On the other hand, in order to ensure the quality of water supply enterprises also requires manufacturers to establish the necessary fixed-point, periodic inspection of a better inspection system and rehabilitation, generally 2 to 5 years is appropriate. Manufacturers of fixed-point of the people, machines, materials, law, ring, etc. to give the five elements of regular inspection and evaluation. Water supply enterprises in the inspection of the factory should be in accordance with the present use of the valve units of the original technical conditions necessary amendments and additions.
We can offer more Knife Gate Valve Information.If you need us according your spcification to produce the Knife Gate Valve .
Need, please e-mail to valve401@gmail.com
A good quality ring valve, the valve manufacturer in the entire process. ① matching the original iron; ② sand mold manufacturing; ③ casting molten iron castings; ④ precision machining. To have a more complete quality guarantee system. Valve of the indicators of the number of little importance, does not have to switch to meet more than 5000 tests. Because the valves in the pipe network is not a regular switch. In some cases, some eight or ten years before switching valve first. In practical work, we discovered that the positioning of the butterfly valve screw is loosened during installation, and some simply do not have丝扣bolts.
6, the flexibility of operation
Whether the flexible valve operation is very important. Operation of flexible, not only in the choice of what kind of drive is also reflected in the transmission mechanism and the components related to the machining accuracy. For example, in the butterfly valve on the drive. There are two transmission methods - lead screw and nut type worm. The general characteristics of screw-type nut switch 2 in the slow middle fast, relatively good, but screw driving force due to the smaller moment, the operator is not easy to master the operation of hoist the extent of the valve, the valve has been prone to shut down operation so that the screw is still distorted, and fracture. And generally easy to worm-based closed-off spaces. At the same time, valve stem seal problems, parts of butterfly valve speed transmission torque and rotation are the matching problem in the valve operation. Therefore, the choice of what kind of drive should be based on the situation of water supply enterprises, and after listening to the views of operators, in close coordination with the manufacturers so that the valve can choose to operate a flexible, can meet the needs of the use and work.
7, the reasonableness of the price
Valve should have a reasonable price, reasonable price is not necessarily the lowest price. If we only focus on the lowest price, it is easy to mislead the manufacturers to sell their products, competing for low prices, even lower than the cost of product sales, the manufacturers in order not to lose money they are bound to be in the process, the jerry-building materials, produced by the valve on the There are quality problems, water pipes used in the Internet, the ultimate loser is the user's own. Therefore, we must pay attention to when in the selection of valves, encourage manufacturers to use value engineering principles, and strengthen the main function to remove redundant features, and optimize the system. Management efforts, efforts in cost accounting. It should be noted that a reasonable price can be the lowest price, but price is not necessarily the lowest reasonable price.
8 guarantee of after-sales service
Valves in the use of the water supply network, there will be all kinds of problems, some are of the valve itself, while others come from external factors destruction, brutal construction, illegal operation, management and use of poor. But for whatever reason, valve problems, will affect the operation of networks, will require manufacturers to accommodate the need for choice in the valve valve manufacturer to have a good after-sales service guarantee. Once the valve problem in the shortest possible time to the scene to solve the problem as soon as possible.
9 order and consistency of supply
Here talked about consistency, refers to the production of valve manufacturers valve products and the need for water supply enterprises in all aspects of the product requirements are the same. This requires that the order side and the supply side (the water supply valve production enterprises and enterprises) joint efforts, not just the efforts of one of the parties. First of all, as a side order of the water supply enterprises, production enterprises in order to when the valve must be in writing, to the valve manufacturer specific technical requirements, which should include the type of valve, the valve should be implemented in different parts of the technical standards and quality standards, the main technical parameters, the various parts of the material, valve type, sealing the form of the requirements of sealing materials, structural forms, connected with the drive and try to pressure and intensity of the technical standards for testing, anti-corrosion and lining the requirements of maximum torque and rotation, assembly and appearance requirements, as well as delivery time, location, number and so on. Valve manufacturers based on orders and technical conditions of the contract, reasonable organization of production, and to ensure that the products produced to meet the order unit (water supply enterprise) the use of the requirements of orders with suppliers to ensure consistency between the two sides.
10 to establish a sound system of inspection and review
When a water supply enterprise, through a series of study, research, and through a range of tests, the final choice of one or several valve manufacturers, its product release to allow water to enter the local market after the permits, it means that for water valves business and manufacturing enterprises has been established between the supply and demand. At the same time, business-to-water supply valve production enterprise to ensure safe, reliable water supply is also the corresponding jointly and severally to assume responsibility. On the one hand, the requirements can be consistently valve manufacturers in accordance with the requirements of water supply companies to provide high-quality products. On the other hand, in order to ensure the quality of water supply enterprises also requires manufacturers to establish the necessary fixed-point, periodic inspection of a better inspection system and rehabilitation, generally 2 to 5 years is appropriate. Manufacturers of fixed-point of the people, machines, materials, law, ring, etc. to give the five elements of regular inspection and evaluation. Water supply enterprises in the inspection of the factory should be in accordance with the present use of the valve units of the original technical conditions necessary amendments and additions.
We can offer more Knife Gate Valve Information.If you need us according your spcification to produce the Knife Gate Valve .
Need, please e-mail to valve401@gmail.com
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