Samson 2408 Mounting And Operating Instructions

Contents

Samson 2408 Mounting And Operating Instructions Manual pdf 8 page image

Check the adjusted set point on the pressuregauge installed upstream of the regulator(Fig. 3).3.3 DecommissioningWe recommend to close the upstream shut-offvalve before closing the shut-off valve in-stalled downstream of the regulator.4 Maintenance and trouble-shootingThe pressure regulator is maintenance free.Nevertheless, it is subject to natural wear,particularly at the seat, plug and operatingdiaphragm.Depending on the operating conditions, theregulator needs to be checked at regular in-tervals to detect and remove possible mal-functions.CAUTION!For installation and maintenance work on theregulator, make sure the relevant plant sec-tion has been depressurized and, dependingon the process medium, drained as well. Werecommend to remove the regulator from thepipeline.If necessary, allow the regulator to cool downto reach ambient temperature before startingany work on it.Disconnect or shut off the control line to avoidany hazards that could be caused by movingregulator parts.As valves are not free of cavities, rememberthat residual process medium might still becontained in the valve.4.1 Pressure fluctuationsNOTICEPressure fluctuations (oscillation) may dam-age the regulator and plant. As a result, pre-vent them from occurring or remove theircause immediately.To stop oscillation from occurring, the follow-ing actions may be helpful:4 Check the pressure tapping point at thecontrol line (refer to section 2.5); if neces-sary, move the tapping point.4 Screw a SAMSON restriction into thesleeve for the tapped connection (9): or-der no. 1991-7114 for 1200 and640 cm², order no. 1991-7113 for 320and 160 cm².4 Check the regulator's sizing data. If nec-essary, change the KVS coefficient, seat di-ameter or diaphragm area.Contact SAMSON (refer to section 6) if theproblems persist.8 EB 2528 ENMaintenance and troubleshooting