1 a, installation and debugging. Pressure reducing valve before installation, whether nameplate certificate and the required valve, appearance whether there is a serious injury. Fully flush pipe, and the pressure reducing valve to wash, if the pressure reducing valve storage time is too long, need to fully clean inside the pressure reducing valve. 2. If the valve itself without pressure gauge, pressure gauge should be installed after the valve before the valve pipes. 3. In order not to affect the use effect of decompression, at the same time, considering the convenience of installation and maintenance, general relief valve should be installed in horizontal pipe runs, bellows type pressure reducing valve for inversion. 4. Before installation should pay attention to the direction arrow on the valve body, the arrow pointing in the direction of medium flow, can't put wrong if medium containing impurities, may block valve hole, 1 meters installed in front of the pressure reducing valve import pipeline filter, filter mesh in more than 20 mu best. 5. Accident, to prevent the valve after pressure to overpressure relief valve outlet 4 meters safety relief valve should be installed. Second, the common failures and repair method 1. Medium to pass or through the quantity is very small. This kind of situation is general for channel blockage, dirt can remove channels. 2. Straight through. 一个。 The piston stuck. Methods: the clearance between piston and cylinder liner dirt. b。 Master, pilot valve stem stuck in the guide hole. Methods: the main and pilot Industrial Valves stem yarn paper mill small diameter. c。 Master, pilot valve sealing surface dirt stuck. Methods: to remove dirt. d。 Membrane damage. Methods: the new diaphragm. 3. Unable to adjust pressure. 一个。 Cylinder liner and piston clearance is too large. Methods: the replacement of cylinder liner and piston. b。 Regulating spring strain or the adjusting range is more than spring up and down limit. Methods: replace or suitable spring. 4. After the valve pressure instability. 一个。 Inlet pressure range is too big. Methods: keep the inlet pressure in a small range. b。 Required flow and the actual flow differ too much. Methods: to count traffic, choose the suitable size.
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