Samson 41-73 Mounting And Operating Instructions

Also see for 41-73 Series: Mounting and operating instructions Mounting and operating instructions Mounting and operating instructions

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Samson 41-73 Mounting And Operating Instructions Manual pdf 14 page image

14 EB 2517 ENCleaning and maintenanceTable 3: TroubleshootingMalfunction Possible reasons Recommended actionPressure exceeds theadjusted set point.Insufficient pressure pulses on the op-erating diaphragm.Clean the control line and the screw joint with re-striction.Seat and plug worn down by depositsor foreign particles.Disassemble the regulator and replace damagedparts.Pressure tapped at the wrong place. Reconnect control lines at a different place. Do nottap pressure at pipe bends or necks.With steam: compensation chamber inthe wrong position or too small.Reconnect chamber at a different place or replaceit (see Table 1 and section 4.3).Control response too slow. Install larger screw joint at the diaphragm actuator.Foreign particles blocking the plug Disassemble the regulator and replace damagedparts.Pressure drops be-low the adjusted setpoint.Valve installed against the flow; seearrow on body. Check direction of flow. Install valve correctly.Pressure tapped at the wrong place. Reconnect control line at a different place.Valve or KVS coefficient too small Check valve sizing. Install larger valve, if neces-sary.With steam: compensation chamber inthe wrong position or too small.Reconnect chamber at a different place or replaceit (see Table 1 and section 4.3).Foreign particles blocking the plug Disassemble the regulator and replace damagedparts.Jerky control re-sponse.Increased friction, e.g. due to foreignparticles between seat and plug.Remove foreign particles. Replace damaged parts.Slow control re-sponse.Restriction in the screw joint of the ac-tuator dirty or too small.Clean screw joint or install larger screw joint.Dirt in the control line. Clean the control line.Upstream pressurefluctuatesValve too large Check valve sizing. Select smaller KVS coefficient, ifnecessary.Restriction in the screw joint of theactuator too large. Install smaller screw joint.Pressure tapped at the wrong place. Select better place for pressure tapping.Loud noises. High flow velocity, cavitation. Check sizing. Install flow divider with gases andsteam.