Dump Truck valve technology standards (b)

Table 1 allow the oil temperature range ℃



ABC level measurement



Allow the oil temperature range ± 1.0 ± 2.0 ± 5.0



5.2 Viscosity



At 50 ℃, the oil viscosity for the campaign 17 × l0-6 ~ 43 × 10-6m2 / s.



5.3 filtering accuracy



Oil filters shall not be less than the accuracy of 25μm.



5.4 Test apparatus, precision instruments



5.4.1 According to A, B, C grading of the three measurements to select the appropriate test instruments, meters, type testing should not be less than B-level measurement hierarchy, the factory test should not be less than C-level measurement hierarchy.



5.4.2 When charged with the value of parameter changes in the scope of the instructions in Table 2 provides the framework, it allows measurement of test parameters recorded.



Table 2 was charged with the parameters allowed to change the value of the scope of the instructions



ABC level measurement



Flow% ± 0.5 ± 1.5 ± 2.5



Pressure% ± 0.5 ± 1.5 ± 2.5



Temperature ℃ ± 1.0 ± 2.0 ± 5.0



Viscosity% ± 5 ± 10.0 ± 15



5.4.3 test test instruments, meters shall not exceed the measurement error of the provisions of Table 3.



Table 3 Instruments and Measurement tolerance



ABC level measurement



Flow% ± 0.5 ± 1.5 ± 2.5



Pressure% ± 0.5 ± 1.5 ± 2.5



Temperature ℃ ± 0.5 ± 1.0 ± 2.0



Note: given in Table 3 is chosen by the scope of the apparatus, instruments used in the actual scope of the range of the margin of error allowed.



5.4.4 the preparation of the test report should indicate the level of measurement tests.



6 Test device



6.1 Pressure point



6.1.1 The location near the mouth pressure



In the disturbance source (such as valves, elbows) downstream and upstream valve test between the disturbance source and the distance not less than 10d, and the distance from the test valve shall be not less than 5d (d is pipe diameter).



6.1.2 Export the location of pressure points



Downstream in the test valve, pilot valve and the distance should be not less than 10d.



6.2 the location of temperature measurement points



Point in the export of downstream pressure, and pressure points and exports should be not less than the distance of 5d.



Flow point measured 6.3 in the downstream temperature measurement and temperature measurement points and the distance should be not less than 5d. 

  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