With the heating system reform, household heat metering and sub-room temperature control has entered the implementation stage, the temperature control valve is installed in the radiator is already very popular, and with the temperature control valve to achieve sub-room temperature control, both the maximum energy conservation, but also satisfy different user needs for indoor temperature regulation is a good thing benefits the country, but how to select temperature control valve did not fully allow users to grasp, if not the right choice of products, not only to can not meet demand, and may give users an unnecessary economic losses, for which the author according to their own application experience, in which published some of my views, designed to give colleagues and users some useful help.
Temperature control valve is installed on the water pipes in the radiator temperature regulation (actually flow regulation) of a device. Manual and automatic temperature control valve is divided into two kinds of temperature control valve, automatic temperature control valve is also called Self-operated temperature control valve or automatic thermostat valve, are also referred to as the thermostat valve. Automatic temperature control valve is a temperature sensor Self-executing agencies and special supporting temperature control valve body composition.
Thermostatic valve valve's structure often straight, angle valve two of the most common two-way valve. Two-way valve is mainly used for two-pipe system or a specially designed a new single-pipe system. In recent years, according to single and double pipe system differences, but also post-graduate output of a single-pipe system specifically applicable to the three links-style temperature control valve and the use of covert installation of suitable single-, double-tube system, a special four-way valve. The four-way valve is currently more common in imported products, such as Italy Jiekemini (GIACOMI-NI) of the four-way valve, which applies not only to all kinds of radiators, and it applies to single and double control systems, but also the ability to to meet the dark filled with a variety of pipe connections.
Thermostatic valve usually have manual, automatic two kinds, the principle of the valve movements are very different. Manual temperature control valve usually spiral lift spool, rotating handle designed a straight line through the spiral into a spool displacement. And automatic temperature control valve in order to meet the temperature sensor specific self-implementing agency of the straight-line moves, spool movement is usually designed to automatically reset the direct linear displacement, therefore the body under normal circumstances are not interchangeable. But there are also interchangeable, a specially designed valve can be generic, that is, automatic temperature control valve of the valve, attach a suitable manual screw lifting mechanism, can be realized manually, automatic common exchange between the two. This is particularly suitable to improve the situation in China have great practical value, in the present, many projects, developers in order to save the initial investment, first install a valve with automatic temperature control feature along with the spiral movements with special handles, so that both the achieved with 1 / 3 the cost of automatic temperature control valve (the price of basic equivalent to manual temperature control valve) for a manual temperature control valve, and gave the user automatic temperature control in the future to upgrade the space left behind. Even in the imports of this product is also rare in this area of Italy Jiekemini walk in front of the market provides such a range of manual, automatic temperature control valve between a known pairs adjustable temperature control valve, eight stalls setting, the indoor temperature as you set up, extremely convenient. Worthy of the world's larger HVAC valve suppliers. It is this range of manual and automatic temperature control valve of the valve between the particularity of, so choice will be complex, this complexity is not fine for some business people and caused speculation salesman "Fish-in-Water-Belt-Buckle-246.html' target='_blank' class='infotextkey'>fish in" The opportunities. In this I remind that, in the current market there are a lot of automatic temperature control valve suppliers salesman will carry a simple adjustment handle automatic temperature control valve body of the net charge as a dual regulatory function of the temperature control valve to the user recommended, and some users to use such a temperature control valve, which is not very appropriate, there are great risks, so that although the automatic temperature control valve body with a simple adjustment on the handle, but the handle design idea of the automatic temperature control valve in order to meet the valve before the first installation of temporary works for the system adjusted to meet the test of water pressure test only, test the water pressure in the test process is completed, be replaced by automatic temperature control valve valve head, because it temporary, so the easy adjustment of the valve handle on the original loan for a fixed temperature control valve head for helical screw lifting the ordinary use. We all know that simple adjustment handle because of its temporary, one-time, generally use plastic, if used as the final frequency adjustment, the thread wear is very fast, not to mention working in the heating system, the spool up and down movements where there is a certain pressure circumstances, even in the absence of pressure systems, the spool itself alone will greatly speed up the spring pressure on the thread handle wear and tear, so use this product as can be upgraded to automatic temperature control valve of the Manual temperature control valve is not appropriate.
I studied Italian Jiekemini that can be upgraded to automatic temperature control valve known as the double-adjustable temperature control valve, and other brands the biggest difference is that it is not a temporary one-time adjustment handle products, but specially designed application of the final product has a durable, spiral-shaped teeth thread lift is a special wear-resistant trapezoidal force, pitch up to 4.5mm. There is no worry about long-term use is, of course, temporary use of more no problem. The general regulation of the handle of the temporary borrowing of the thread teeth fixed for the fine thread, thread for general triangular-shaped teeth, the pitch of only 1.5mm. Such temporary handle to rotate three times the displacement of spool 4.5mm pitch with trapezoidal thread lap rather, it means that you will open the valve from the smallest to the largest three times the time required, which often need to adjust the temperature and control valve for regulating the inconvenience is obvious.
Let's look at automatic temperature control valve, automatic temperature control valve is usually divided into two parts, valve and valve head, valve commonly used method of production of copper casting or hot forging, valve head temperature sensors are generally divided liquid and solid: solid is divided into two kinds: one is the La-system, a hot-memory alloy. Currently on the market the popular media, most of paraffin solid sensor, with little heat memory alloy. Here's the market that are common to the respective valve and valve head to make a simple introduction to automatic temperature control valve for selection for reference.
Temperature Control Valve Body: Copper casting has the advantage of casting-shaped cavity can be complex products, mold cost less, lower production costs, but the drawback is more than casting defects, materials, compressive strength is poor; In contrast, the copper body by forging dies high value and complexity of forging equipment, production costs are high, but was able to obtain high-strength products, pressure capability is also much higher than the casting, while effectively avoiding casting defects. Thus less complex shape of the body, the professional manufacturers adopt traditional methods of forging body. But there are also some manufacturers to use traditional methods of casting, this requires the user to distinguish carefully. I think the use of a radiator temperature control valve on the valve body are simple, using hot forging is very appropriate.
In the selection body should pay attention to detail when there is a lot of valve design in order to be more simple, straight-through valve body inlet and outlet in the same axis, so that while the design is simple, but the displacement of spool space will be subject to We, therefore, the general type of valve spool displacement is only 2-3mm. I studied Italian Jiekemini automatic temperature control valve body, its straight-through body design is very unique, guaranteed entry and exit axis in the same circumstances, with the dislocation channel cavity design, effectively increase the displacement of the spool space, makes the spool displacement of up to 4-5mm, which in a recent design of an automatic temperature control valve is rare. Spool displacement increases the more dirty HVAC water is very beneficial, too small spool displacement in a relatively dirty water and scale HVAC serious cases will be very prone to gridlock.
Thermostatic valve head: Temperature Control Valve head temperature sensor inside the inner filling of liquid and solid media are generally two types of liquid and solid production process due to different manufacturers in general are usually a result of restrictions by the scale of production, often using only one A process to produce liquid or solid valve head, only a few large-scale production of both types of valve head chamber of commerce to facilitate customer choice. As for the difference between the two valve head, I think it should be said in HVAC applications, there is not much difference, if we must point out the difference of the Department, I think in the following aspects: First, different size. Generally speaking, the liquid to achieve the same thermal expansion, a larger displacement of the liquid, so temperature sensor larger, so larger valve heads, with a small proportion of valve sets a little after the lack of coordination, so is preferable to use solid-type valve something more beautiful head. Second, fluid sealing technology to be more complex, the production costs are relatively solid to be a little higher, so sales prices are often higher. 3, the liquid valve head to be a little more sensitive than the solid and this is the only liquid and solid advantages in comparison, but in the HVAC field in terms of a typical large-delay system, this advantage is not much effect. All in all, whether liquid or solid thermostatic valve head, as long as a qualified product, can fully meet the EN215 standard in the time sensitive requirements. I had two Italian Jiekemini medium temperature sensor in nation-building project quality inspection center to compare measurements and found no significant differences.
It is worth mentioning that the Italian Jiekemini the installation of thermostatic valve head is also very unique, the general temperature control valve installation of the first threaded connections are used, rather Jiekemini they used their own patented technology, fast card pressure-type connections, fast and safe, effective and easy to avoid the loose screw connection manually defects.
In the body of the connection alive Festival Jiekemini also has its own patent, that is connected to hot on the live festival PTFE self-dense material, to facilitate the installation or hemp rope without wrapping raw materials, effectively increasing installation of efficiency, and achieve an effective seal.
To sum up, when you want to use temperature control valve should be careful when you transfer the election, so that money can at least make the best choice, whether it is manual, dual-adjustable or automatic temperature control valve, Italy Jie Kemi Nepal can be said is the perfect choice of partner, and complete products, attentive service, all so you can get satisfaction.
Generally speaking, if the most efficient as a choice for investment principles, without regard to the benefits of energy-saving automatic temperature control valve does not consider future upgrades for automatic temperature control valve, then you can choose a purely manual temperature control valve.
If, for with very little investment, taking into account the future by the owners themselves to upgrade to automatic temperature control valve, then the optional dual-adjustable temperature control valve, a dual-adjustable thermostatic valve with pure manual temperature control valve is basically the same price.
If you want to make a one-stop choice, then can choose automatic temperature control valve, generally prices are about three times the manual temperature control valve.
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