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 13 page image

EB 2517 EN 13Cleaning and maintenance6 Cleaning and maintenanceSee Fig. 1 on page 7.The regulator does not require any mainte-nance. Nevertheless, it is subject to naturalwear, particularly at the seat, plug and oper-ating diaphragm.Depending on the operating conditions,check the regulator at regular intervals toavoid possible malfunctions.Details on faults and how to remedy themcan be found in Table 3 on page 14.WARNING!Before performing any work on theregulator, make sure the relevantplant section has been depressurizedand, depending on the process medi-um, drained as well. We recommendremoving the valve from the pipeline.When used at high temperatures, al-low the plant section to cool down toambient temperature.Disconnect or shut off the control lineto prevent the risk of moving regula-tor parts. As valves are not free ofcavities, remember that residual pro-cess medium might still be containedin the valve.NOTICEMake absolutely sure that no torqueis applied to the bellows seal (5.1)during assembly or disassembly.Otherwise, the metal bellows will bedestroyed.6.1 Replacing the operating di-aphragmIf the upstream pressure deviates consider-ably from the set point, check if the dia-phragm is leaking and, if necessary, replaceit.− Shut down the plant by slowly closing theshut-off valves. Depressurize the relevantsection of the pipeline and, if necessary,drain it as well.− Unscrew the control line (17) and cleanit.− Loosen the bolts (15) at the actuator andremove the casing.− Unscrew the nut (14) and lift off the dia-phragm plate (13).− Replace the operating diaphragm (12)with a new one.− Proceed in the reverse order to reassem-ble the regulator. For start-up, proceedas described in section 5.1.