Control systems Self-acting controls
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Safety information, installation and maintenance For full details see the Installation and Maintenance Instructions (IM-S21-01) supplied with the product. Installation note The valve should be fitted in a horizontal line. The actuator position will depend on the type fitted to the valve. Maintenance note How to fit general: - Remove the control system sensor from the plant and allow it to cool (SA systems). - Disconnect the actuator from the valve. - Before attempting to carry out any repairs, make sure that the valve is fully isolated.
- It is important always to renew the complete assembly as listed in 'Spare parts' and to make sure that all the joint faces are clean. - Always reassemble using new gaskets lightly coated with a suitable jointing compound (preferably of a non-graphited type). Valve seat assembly: - To replace the valve seat assembly unscrew the bonnet ( 7 ). - Remove the valve seat ( 3 ) from the body ( 1 ) and replace it with a new one using a box spanner 18 mm A/F. - Unscrew the spindle retaining nut and withdraw it from the bonnet ball head and spindle assembly. The ball head and spindle assembly of the BM and BMF valves are preassembled and set to the correct length. No further adjustment is necessary. - Replace the new assembly or spring (BMRA and BMFRA). - Tighten the spindle retaining nut. - Refit the bonnet to the valve body using a new gasket. How to order Example: 1 off Spirax Sarco DN15 BMRA self-acting control valve having flanged EN 1092 PN25 connections.
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TI-P036-01 CTLS Issue 7
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BM, BMRA, BMF and BMFRA Self-acting Control Valves
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