Dump Truck valve technology standards (c)

The use of 6.4 and the pipeline should be straight along the axis direction of the hole diameter should be basically the same.



6.5 Use of tubing and related accessories and valves should be the size of the oil out of the mouth to adapt the size and direction should be the level of pipeline installation.



6.6 pore pressure



6.6.1 Pressure-hole diameter should be not less than 1mm, and not more than 6mm.



6.6.2 the length of pore pressure should be not less than pressure of 2 times the hole diameter.



6.6.3 manometry should be hole centerline and the centerline of the vertical tubing, pressure tubing and the inner surface of the angle hole edges should be maintained, but may not have a burr.



6.6.4 Instrumentation and Measurement of pressure points of connection between the pipe diameter should be not less than 3mm.



6.6.5 manometry connection with the measuring instruments should be excluded from the air pipe to connect.



Test Method 7



7.1 test run



In the nominal pressure, the rated flow, the valve for 20 consecutive times, should satisfy the requirements of 4.1.



7.2 Pressure Loss Test



7.2.1 the scope of the entire flow pressure loss test



Conditioning test system so that the flow from zero to rated flow, which take at least 4 points to measure from the mouth into the oil to the mouth of the oil pressure loss, rendering the flow, pressure loss curve.



7.2.2 The rated flow capacity test under the pressure loss



Flow valve at rated flow, the oil from the mouth into the oil to the mouth of the mouth to work the oil into the oil and oil I mouth to the mouth of the oil pressure loss.



Note: The pressure loss in the test population of its oil pressure must be more than 0.1MPa.



7.3 within the leakage test



Test system regulating valve into the oil pressure of the mouth Nominal pressure, in accordance with the test valve function and structure of slide-valve, respectively, from the oil port and oil return valve test I measured by work at any location within the leakage at the time, should meet the the requirements of 4.3.



Note: ① In the leakage test in, the outflow pressure for the atmospheric pressure side.



② pressure must be increased to 15s Nominal pressure from atmospheric pressure.



7.4 Pressure Test



I will work to block the oil from the oil into the mouth of the action of the valve position to exert pressure, when the nominal pressure of not more than 16MPa, the imposition of nominal pressure of 1.5 times the pressure; When Nominal pressure greater than 16MPa, the imposition of nominal pressure of 1.25 times the pressure. 3min continuing assessment of the oil ministries and so on. During the trial, the oil pressure of the mouth of the atmospheric pressure, test results should meet the requirements of 4.4.



7.5 Durability Test



Nominal pressure slide-valve in the rated flow, the continuous change of the 10 million, the assessment of its pressure loss and internal leakage performance.



8 inspection rules 8.1 Type tests



8.1.1 Type test valve means a comprehensive examination of the quality, performance tests. 

  ball valve Trunnion Mounted Ball Valve Floating Ball Valve Top Entry Ball Valve Three way ball valve V Type Ball Valve
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