Before installing steam pressure reducing valve should be removed to flush piping system. Into the valve to prevent welding slag, scale and other stolen goods, destroy the steam pressure reducing valve sealing surface, impact valve normal work. Steam pressure reducing valve should be installed in the place where is convenient for operation and maintenance, and must be installed in horizontal pipe runs handstand, should pay attention to the medium inside the pipeline flow valves, hydraulic control valve in accordance with the direction indicated by the arrows on the valve body, do not reverse. Steam medium valve must be installed backwards, matching of the condenser must be higher than the actuators, such actuators can be full of the condenser, protect the diaphragm. Prolong service life. When steam pressure reducing valve used in installation, should add cold water condenser, open the by-pass pipe cut-off valve, expel a mixture of condensed water and soda in line, in case of the relief valve opens to produce water there is damage to the pressure reducing valve, when no abnormal phenomenon, slowly turn adjusting screw clockwise, the outlet pressure to set the desired pressure ( The table after the valve pressure shall prevail) , after the adjustment, the lock nut back tightly, screw on guard. Pressure reducing valve should be installed before the filter, debris into the pressure reducing valve, in case the medium influence its performance. Should have a straight pipe before and after the installation of the pressure reducing valve, valve in front of the straight pipe length is about 600 mm, the valve after the straight pipe length is about 1 mm. General relief valves require import and export pressure difference must be zero or more. 2Mpa。 5 mpa, regulating range of error is plus or minus 5% ~ 10%. Troubleshooting valve pressure instability with valve pressure changes before and after changes; The reason; 1, the valve core is foreign matter in; 2; The valve stem, push rod stuck; 3; Into the liquid pipeline jam elimination method; 1; To dissect out foreign body 2, readjustment; 3, after the dredge valve pressure drop is not down, always over the demand value changes; The reason; 1; Set a spring stiffness is too big 2, 3 valve diameter is too large, before the valve pressure is too high, too much relief than elimination method: 1, change the spring 2, replace the small diameter 3, pressure before the valve: the valve after pressure should be the 2nd level more than 10:1 decompression valve after pressure rise not to go up, always below the demand value changes; The reason; 1; Set a spring stiffness is too small 2, 3 valve diameter is too small, are too small to exclude methods: 1, change the spring 2, replacement of large diameter 3, pressure before the valve: the valve after down to 1. 25, should raise pressure valve before the valve pressure rise not to go up, is always in demand value below the action; The reason; 1; 2, valve core set a spring stiffness is too small foreign body in; 3; The valve stem, push rod stuck; 4. core and valve seat is damaged, 5, and large amount of leakage of the valve diameter is too large to rule out method; 1; Replace the spring 2, 3 to tear open outfit, readjust the 4. Regrinding or replace before 5, change the small Industrial Valves pressure drop is not bottom go to, is always in demand value above action causes; 1, 2 set a spring stiffness is too big, 3 valve diameter is too small, valve core, valve stem, push rod stuck out methods, such as: 1, change the spring 2, 3 the large caliber, eliminate jammed, readjust the valve after pressure or valve pressure fluctuations too often causes 1, 2 actuator valve diameter is too large mold room capacity is too small to exclude methods: 1, choose proper valve diameter 2, adding a damper in the liquid pipe
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