High pressure pneumatic regulator thermocouple placement

High pressure pneumatic - valve thermocouple placement (1) high pressure pneumatic - valve nominal size DN '100 mm ( NPS4） , nominal pressure PN10, PN16, PN25 measure the position of the sensor. 1) Pressure gauge, pressure gauge reading scope shall be the test pressure of 1. 5 ~ 4 times, the measuring accuracy is 3% of the standard calibration. 2) - heat meter square, as shown in figure 2 37 shown in 38 mm hot measurement of cubic block, block application of carbon steel manufacturing, the center for the thermocouple sensor area, for the nominal size of the test valve, should use two heat meter square, according to FIG. 2 35 set. Should be used for nominal dimension test valves, two heat meter square, the use of two squares should be according to FIG. 2 36 set, nominal size, adding a heat meter square, as shown in figure 2 - 36 footnotes a. 3) Fire from test valves or any heat meter need at least 150 mm, and enough to completely closed the valve on the test flame. 4) Test on high pressure pneumatic - valve outlet piping shall be installed a is not less than the cut-off valve DN15, and pipe to tilt down, in order to fully discharge test medium. 5) Between the walls of fire test apparatus and test the valve should be kept clean, without sundry, horizontal wall and the distance between the test of any part of the valve for at least 150 mm, the vertical direction from the test of the valve on the top wall of at least 150 mm. 6) If the test valve upstream work pipe diameter greater than DN25 or greater than the nominal size of the test, the need in the test valve at least 150 mm pipe with flame closed the work. Transmission capacity of the upstream pipe should be greater than the maximum permissible of tested valve leakage, therefore, should be designed so that test device. 7) Test and high pressure pneumatic control valve and pipe joint leakage does not include testing evaluation scope, also does not include within the scope of the allow external leakage, therefore must tighten connection, in order to reduce leakage. 8) Fire environment and with body thermocouple calibration accuracy should at least equal to IEC 60584 - 2 B level 2 or level 3 other type. 9) Receive the tested valve leakage container should be big enough. 10) Calibration sight gauge or gauge.