Pipeline pump electric three-way valve installation standards have?

Pipeline water pump in installation, the valve is a common equipment, electric three-way valve is what effect, install and use what is standard practice, which need to pay attention to the below pump electric three-way valve knowledge to make explanation; A, electric three-way valve coupling 1, 【 The quality common fault 】 Drive connected to the valve body is not strong, axiality deviation is big, easy to cause the body is damaged, the control is not accurate, seriously affect the normal production. 2. 【 Standard practice 】 一个。 Will drive shaft and the body axis is after, with activity tighten fittings, using hand switch valve, observe whether the coupling is loose. If loose, continue to tighten, trial and error, until no loose phenomenon. b。 Ensure the flexible motion, especially the coaxial degree of coupling, need double checking. Second, the body installation 1, 【 The quality common fault 】 Flow direction of medium and the valve installation direction is wrong; The body did not check before installation ( Main inspection body injury, sand holes) ; Tighten the flange bolts not according to requirements. 2. 【 Standard practice 】 一个。 According to the technological requirements, need to relevant departments of the inspection, the inspection before installation. b。 First determine the direction of the flow direction of medium pipeline and body, when installation to ensure medium direction with the direction of arrow on valve body. c。 Electric three-way valve when installation should be at least 30 cm above the space, and with the surrounding with sufficient maintenance, piping, equipment operation space, convenient for dismantling and maintenance of the valve. d。 Flange surface with the pipe axis perpendicularity, parallelism of the valve and pipeline must be guaranteed. e. Flange tightening torque wrench is used when, in accordance with the requirements of first, fastening bolt in diagonal, specific torque according to the specification and the relevant requirements. Three, drive debug 1, 【 The quality common fault 】 Before electric three-way valve to electricity, the valve is open to a certain state, after power on the valve movement direction is not in conformity with directive direction, will not lead to valve action or valve is damaged. 2. 【 Standard practice 】 一个。 Electric three-way valve manually open position to around 30%; b。 Valves on the electric, inching control valve switch, confirm the valve movement direction and instruction direction are consistent, when inconsistent, by adjusting the motor and reversing or replace switch instructions to solve. c。 The valve switch direction after the adjustment, respectively, the valve fully open, close, to determine the limit switch. d。 The overall debugging, should be observed at least three full operation schedule. Four, the 3-way valve (pos. No. Connection 1, 【 The quality common fault 】 Terminal connection is loose, lead to valve is not action, can't normal production. 2. 【 Standard practice 】 一个。 Fastening connection the strength should be moderate, greatly too forcibly prevent lead to screw thread slipping. b。 Wire thread must use wire nose and compaction to prevent loose, lead to poor contact. c。 Prone to poor contact terminals, should check again and again, to prevent loosening. d。 Wiring has been completed, with handle gently, check whether the solid, then tighten all terminal again again.
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