Emerson A31A- Manuals

Page 2 - Instruction Manual; End Connection Styles

A31A Valve Instruction Manual Form 5291 March 2008 2 Table 1. Specifications Valve Size and End Connection Styles NPS J 14, J 16, J 18, J 20, and J 24 valves, and in J wafer-style (flangeless) or J single-flange (lugged) with raised-face flanges, CL150 or 300 Maximum Pressure Drop (1) Consistent wit...

Page 4 - Installation; WARNING; Always wear protective gloves,

A31A Valve Instruction Manual Form 5291 March 2008 4 Table 2. Material Temperature Ratings COMPONENT AND MATERIAL OF CONSTRUCTION (1) TEMPERATURE RANGE _ C _ F Valve Body Carbon Steel (WCC or SA 516-70) (5) CF8M (316 SST) CL150CF8M FMS 20B16 (0.04% min. carbon) CL300 29 to 427198 to 538198 to 816 20...

Page 5 - Use pressure-relieving devices as; CAUTION

A31A Valve Instruction Manual Form 5291March 2008 5 the limits given in this manual or onthe nameplates. D Use pressure-relieving devices as required by government or acceptedindustry codes and good engineeringpractices to protect fromover-pressurizing the system. D Check with your process or safety...

Page 8 - See figure 5 for recommended valve orientation.

A31A Valve Instruction Manual Form 5291 March 2008 8 Figure 4. Proper Installation Steps B2263-1/IL A5557/IL Figure 5. Properly Installed Wafer-Style Valve Adjusting the Actuator Travel Stops orTravel Key number locations are shown in figure 9, unlessotherwise noted. 1. Refer to the actuator instruc...

Page 9 - Packing Adjustment and Shaft Bonding; For PTFE or graphite packing:; Warning; Note

A31A Valve Instruction Manual Form 5291March 2008 9 D For Single-Flange Valves: Position the valve between the flanges. Be sure to leave enough roomfor the flange gaskets. Install the lower flange bolts. 2. For all Valves: Select the appropriate gaskets for the application. Flat sheet, spiral wound,...

Page 10 - Maintenance; even when the valve has; Removing and Replacing the Actuator

A31A Valve Instruction Manual Form 5291 March 2008 10 Figure 6. Optional Shaft-to-Valve Body Bonding Strap Assembly VALVE BODY ACTUATOR A A VIEW A-A 37A6528-AA3143-2/IL 6. For more information, refer to the PackingMaintenance section below. Maintenance Valve parts are subject to normal wear and must...

Page 11 - The packing is now accessible.

A31A Valve Instruction Manual Form 5291March 2008 11 Usually, packing leakage can be eliminated bymerely tightening the hex nuts (key 15) locatedabove the packing follower (key 12) while the valveis in the pipeline. However, if leakage continues, thepacking must be replaced. For PTFE ENVIRO-SEAL pac...

Page 13 - PTFE Seals

A31A Valve Instruction Manual Form 5291March 2008 13 Table 6. Torque Values for Fasteners FASTENER NOMINAL SIZE RETAINING RING SCREWS GASKET RETAINING BOLTS N S m In S lbs N S m In S lbs #10 4.6 41 4.0 35 1/4 11 100 9.2 81 5/16 25 220 19 167 3/8 45 400 33 295 N S m ft S lbs N S m ft S lbs 7/16 72 53...

Page 15 - actuator travel stop or by the actuator; Remove the

A31A Valve Instruction Manual Form 5291March 2008 15 This adjustment is necessary to be certain that theactuator output torque is fully absorbed by the actuator travel stop or by the actuator . The internal travel stop in the valve body should notabsorb any of the actuator torque. CAUTION When using...

Page 16 - Remove the packing from around the upper shaft.; Installing the Two-Piece Shaft

A31A Valve Instruction Manual Form 5291 March 2008 16 follower (key 102), jam nuts (key 17),anti-blowout flange (key 10), and the spring packassembly (key 103). See figure 10. 4. Remove the packing from around the upper shaft. 5. Remove the tangential pins or disc pins. Locatethe pins (key 25) in th...

Page 18 - Gasket Retainer; Refer to table 6 for proper torque values.; Parts Ordering; Typical parts are shown in figure 9.; Retrofit Kits; See table 8 for retrofit kit part numbers.

A31A Valve Instruction Manual Form 5291 March 2008 18 excessive force, use appropriate carewhen driving the pins into the disc huband shaft(s). Use the right tool. Do notuse excessive force. 12. Install the appropriate tangential pins, and discpins. Use 2 tangential pins that will go through theuppe...

Page 19 - Repair Kits; Parts List

A31A Valve Instruction Manual Form 5291March 2008 19 Repair Kits PTFE Repair kits include a single PTFE packing setand anti-extrusion washers. Graphite packing sets include graphite packing rings and carbonanti-extrusion rings. See table 8 for PTFE repair kitpart numbers. Table 8. Retrofit and Repai...

Page 20 - Packing System

A31A Valve Instruction Manual Form 5291 March 2008 20 Key Description Part Number 26* Retaining Ring Gasket, Oxygen Service, CL150 (continued) NPS 20 V169962X012 NPS 24 V161471X022 CL300 NPS 14 V113741X022 NPS 16 V112064X022 NPS 18 V161469X022 NPS 20 V112062X022 NPS 24 V124687X022 27 Cap Screw Actua...