GE Oil & Gas Model 37/38 Masoneilan* Spring-Diaphragm Actuators Instruction Manual GE Data Classification: Public
| GE Oil & Gas GE Proprietary and Confidential © 2014 General Electric Company. All rights reserved.
THESE INSTRUCTIONS PROVIDE THE CUSTOMER/OPERATOR WITH IMPORTANT PROJECT-SPECIFIC REFERENCE INFORMATION IN ADDITION TO THE CUSTOMER/OPERATOR’S NORMAL OPERATION AND MAINTENANCE PROCEDURES. SINCE OPERATION AND MAINTENANCE PHILOSOPHIES VARY, GE (GENERAL ELECTRIC COMPANY AND ITS SUBSIDIARIES AND AFFILIATES) DOES NOT ATTEMPT TO DICTATE SPECIFIC PROCEDURES, BUT TO PROVIDE BASIC LIMITATIONS AND REQUIREMENTS CREATED BY THE TYPE OF EQUIPMENT PROVIDED.
Description Life Period The Masoneilan 37/38 spring-diaphragm actuator is a simple, powerful, mechanical device. There are two general types: Air-to-Extend Stem and Air-to-Retract Stem. Actuators are designated by case size: Nos. 9, 11, 13, 15, 18 and 18L. The current estimated useful life period for the Masoneilan 37/38 actuator is 25+ years.
Air-to-Retract Actuators (Type 38) Diaphragm Replacement The procedure is the same as for air-to-extend actuators except that the entire upper case assembly (including spring barrel (71), spring (22), spring seats (33 and 34), nut (30) and diaphragm plate (40) must be removed to release the diaphragm. Install a new diaphragm and reassembly the above parts. Spring Adjustment The procedure is identical with that for air-toextend actuators except that supply air is piped to the 1/4" port in the yoke.
Air-to-Extend Actuators (Type 37) Case Nos. 9, 11 & 13 Case Nos. 9, 11 & 13 Case Nos. 15, 18 & 18L Air-to-Extend Actuators (Type 38) Case Nos. 15, 18 & 18L Parts Reference Ref. No. **15 17 18 **19 20 21 22 22A 26 30 31 Part Name Gasket (packing box) Yoke Cap Screw (L case to yoke) Gasket (L case to yoke) Packing Nut Snap Ring Actuator Spring Actuator Spring Actuator Stem Nut (actuator stem) Packing Box Computer Abbrev. Ref. No.
Notes GE Proprietary and Confidential © 2014 General Electric Company. All rights reserved.
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