Leslie-controls CONTROL VALVES SINGLE PORTED DOS User Manual

Installation, Operation and Maintenance 10/1.5.1 Rev. 0 CONTROL VALVES SINGLE PORTED CLASSES DL, DDL, DOS, DDOS

10 Figure 8 - Direct Acting Diaphragm Actuator Figure 9-Reverse Acting Diaphragm Actuator NOTE: To check actuator spring and other compo

11 SOME IMPORTANT NOTES FLAT SHEET RUBBER MATERIAL Flat sheet rubber material may be used in 55R, 85R and 135R actuators as emergency rep

12 It is solely responsibility of system designer and user to select products and materials

2 Illustration Index Figure 1 - Typical Installation ...

3 INSTALLATION Valve Position (see Fig. 1) Install control valve in the highest horizontal line of piping, in an accessible location and wit

4 diaphragm. Rated travel is shown by position of travel indicator on valve stem relative to travel indicator scale on yoke. 3. Manual

5 Removing Actuator from Valve Body Assembly Direct Acting Actuator: Loosen valve plug stem nut (29). Use wrench on flats of valve plug stem and t

6 Figure 5 - Use of Seat Ring Wrenches to Remove or Install Seat Rings To Install Seat Ring(s)/Inserts 1. Carefully clean threads and joint

7 valve plug stem when lapping. Weight of parts is sufficient to cause lapping action. 4. Place lapping compound on valve plug face. 5.

8 3. Place new gasket (50) in recess in valve body. 4. Follow with seat ring/insert (51), with valve plug seating face toward bonnet

9 plug away from seat ring/insert(s). Then turn valve plug stem one full turn out of actuator stem threads until valve plug just contac