ENVIRO-SEAL Packing System for Types A11, A31A, A31D and 8532

Transcription

1 Instruction Manual Form 50 January 000 ENVIRO-SEAL System Butterfly Valves ENVIRO-SEAL Packing System for Types A11, A1A, A1D and 85 Contents Introduction Scope of Manual ENVIRO-SEAL Packing System Valve/Actuator Shaft Coupler Description Installation Removing the Actuator Installing an ENVIRO-SEAL Packing System.... Other Considerations Parts Ordering Parts Kits Repair Kits Retrofit Kits B0001-A/DOC Figure 1. Typical ENVIRO-SEAL Butterfly Packing System Introduction Scope of Manual ENVIRO-SEAL Packing System This instruction manual includes installation and parts ordering information for the Fisher Controls ENVIRO-SEAL live-loaded packing system for highperformance butterfly valves (figure 1). This manual covers the ENVIRO-SEAL live-loaded packing system for the following valve Types: A11, A1A, A1D and 85. Refer to the appropriate instruction manuals for necessary information on the installation, operation, and maintenance of the control valve, actuator, and accessories. ENVIRO-SEAL packing systems, for Butterfly valves, utilize a Belleville (coned-disk) spring system. Only persons qualified through training or experience should install, operate, or maintain the ENVIRO-SEAL packing system, valve, actuator, and accessories. If you have any questions about instructions in this manual, contact your Fisher Controls sales office or sales representative before proceeding. D101841X01

2 Table 1. Specifications Applicable Valve Designs Types 85, A11, A1A, A1D Pressures and Temperatures (1) See table Applicable Valve Sizes and Shaft Diameters () See table 1. Do not exceed the pressure/temperature limits in this manual, in the valve literature, or in any applicable code or standard.. Shaft diameter: Diameter through the packing box. Table. Maximum Application Temperature and Pressure for 500 PPM Service MAXIMUM APPLICATION ENVIRO-SEAL TEMPERATURE MAXIMUM PACKING MAXIMUM APPLICATION APPLICATION MATERIAL TEMPERATURE PRESSURE C F Single PTFE 450 Graphite For class ratings of valves listed in this instruction manual. Not Restricted (1) Not Restricted (1) Valve/Actuator Shaft Coupler To install an ENVIRO-SEAL packing system on a Type A11, A1A, A1D or 85 valve with a non-standard, non-fisher Controls produced actuator may require a special valve/actuator shaft coupler. Table 5 contains a list of valve/actuator combinations and part numbers for the new coupler. If you are considering installation of an ENVIRO-SEAL packing system in another existing valve/actuator package, check table 5 to see if a new coupler is required. In some cases, coupler replacement is not required when retrofitting valve/actuator combinations. Table 6 contains a list of valve/actuator combinations that can use existing couplers. Description The ENVIRO-SEAL packing system from Fisher Controls offers exceptional sealing capabilities. ENVIRO-SEAL packing systems easily install in your existing valves, or you can purchase this packing system installed in a new valve from Fisher Controls. The ENVIRO-SEAL packing system for high-performance butterfly valves utilizes a packing spring system that provides a constant load over the life of the packing material. This system of external live-loading reduces the need for packing box maintenance and adjustment. The ENVIRO-SEAL packing system design, coupled with very smooth shaft finishes and the live-loading of the packing gives you longer service with very low maintenance. ENVIRO-SEAL packing systems help you conserve valuable process fluid and protect the environment against the emission of toxic or hazardous pollutants. Installation Use these instructions to install ENVIRO-SEAL packing in existing high-performance butterfly valves that have standard packing, or when inspecting or replacing existing ENVIRO-SEAL packing. If you are changing the packing system material from standard graphite to ENVIRO-SEAL graphite or ENVIRO-SEAL PTFE packing, the packing friction for ENVIRO-SEAL packing will be lower than it was for the standard packing. Therefore, no change should be needed in actuator sizing. If you are changing the packing system material from standard PTFE to ENVIRO-SEAL graphite or ENVIRO-SEAL PTFE packing, the packing friction will increase. Contact your Fisher Controls sales office or sales representative to determine if your existing actuator will be large enough. Removing the Actuator WARNING Avoid personal injury from sudden release of process pressure or uncontrolled movement of parts. Before performing any maintenance operations: Disconnect any operating lines providing air pressure, electric power, or a control signal to the actuator. Be sure the actuator cannot suddenly open or close the valve. Use bypass valves or completely shut off the process to isolate the valve from process pressure. Relieve process pressure on both sides of the valve. Drain the process media from both sides of the valve.

3 Vent the power actuator loading pressure and relieve any actuator spring precompression. Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment. Always wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal injury. The valve packing area may contain process fluids that are pressurized, even when the valve has been removed from the pipeline. Process fluids may spray out under pressure when removing the packing hardware or packing rings. You must remove the actuator from the valve when you install ENVIRO-SEAL packing systems. To allow proper readjustment of the valve disk position, it is recommended that you remove the valve from the pipeline. Refer to appropriate valve and actuator instruction manuals. If a spring-return actuator is used, be sure the actuator spring is resting on its travel stop. If something is obstructing shaft rotation, it is possible that disconnecting the shaft connector will allow the spring to force the actuator to the end of its rotation. Refer to the appropriate valve and actuator instruction manuals to remove the actuator. Installing an ENVIRO-SEAL Packing System When installing an ENVIRO-SEAL packing system into an insulated valve, do not cover the packing springs with insulation. Table. Applicable Valve Sizes and Shaft Diameters (1) VALVE VALVE SIZE, TYPE INCH CLASS A1A & 1 A1D A1A 1 & A1D A Shaft Diameter through the packing box. CAUTION VALVE SHAFT DIAMETER mm Inch /16 11/16 15/16 15/16 1-1/8 1-1/4 1-/8 1-1/ 1-/4-1/ 1-/8 1-1/ 1-/4-1/ 9/16 11/16 15/16 1-1/4 1-5/8 1-7/8-1/4-1/ -1/ -1/4-1/ -1/ 9/16 /4 1-1/8 1-1/ 1-/4-1/4-1/ -1/ The valve shaft surface condition is critical in obtaining a good seal. If the valve shaft surface is scratched, nicked, or worn, replace the valve shaft before installing the ENVIRO-SEAL Packing System. 1. If you are installing an ENVIRO-SEAL packing system in an existing valve, remove existing packing nuts, packing flange, jam nuts, anti-blowout flange, packing follower, and any other external packing components from the valve body. Use caution when removing existing internal packing parts. Do not scratch, nick, or dent the valve shaft.. After removing the external packing components, remove the anti-blowout wire that surrounds the valve shaft.. Remove packing and all other internal components from the packing box. 4. Inspect the existing valve shaft. If necessary, replace the valve shaft. Refer to the appropriate valve instruction manual to replace the valve shaft.

4 B9116-B / DOC NOTES: 1 NOT USED ON VALVES LARGER THAN 1 INCH NOT USED ON TYPE A11 DESIGNS NOT USED ON TYPE A11 CLASS 600,4 & 6-INCH Figure. ENVIRO-SEAL PTFE Packing System 14B0095-A / DOC ENVIRO-SEAL PTFE packing systems can be used in either vacuum or positive pressure service. You do not need to reverse ENVIRO-SEAL PTFE packing components in vacuum service. Ensure that the Belleville springs are stacked properly and packing box parts are assembled in the correct order (see figure 4). Packing parts cannot function properly if the Belleville springs or other packing parts are not stacked correctly. 5. With the shaft in place in the valve, install the packing components into the valve packing box. Install the components in the following order: a. Place one of the packing box rings (key 107) into the packing box. Be sure the packing box ring is properly seated. This does not apply to sizes -, 4- and 6-inch Class 600 A11. b. For PTFE packing, place an anti-extrusion washer (key 106) into the packing box and push it in until it rests next to the packing box ring (key 106 is not used with graphite packing). The graphite packing set has a carbon anti-extrusion ring on the top and bottom of the packing. These anti-extrusion rings are designed to have a slight interference fit on the shaft. The rings have a single fracture to allow the ring to be installed on the shaft. Additional fractures may develop while the valve is in service, however these additional fractures will not affect the performance of the ENVIRO-SEAL packing. c. Place the packing set (key 105) into the packing box. Refer to figure or for the proper orientation of the packing set. d. For PTFE packing, place another anti-extrusion washer (key 106) into the packing box after the packing set (key 106 is not used with graphite packing). e. Place the second packing box ring (key 107) into the packing box. f. Locate the new spring pack assembly (key 10). Remove the O-ring and packing springs from the packing follower. Use the packing follower to press the packing components into the packing box. Remove the packing follower. 6. Install the new anti-blowout wire (key 16) in the groove around the valve shaft. 4

5 14B0086-A/DOC 4 B9116-B/DOC NOTES: 1 VALVES WITH SHAFTS LARGER THAN 1 1/ INCH (8.1 mm) USE GRAPHITE RINGS NOT USED ON VALVES LARGER THAN 1 INCH NOT USED ON TYPE A11 DESIGNS 4 NOT USED ON TYPE A11 CLASS 600, 4 & 6-INCH Figure. ENVIRO-SEAL Graphite Packing System 7. Slide the packing follower from the new spring pack assembly over the valve shaft and anti-blowout wire until it rests against the packing box ring. 8. Install the longer packing studs (key 100). 9. Place the anti-blowout flange (key 10) over the valve shaft, packing studs, and packing follower. Secure the anti-blowout flange with the new jam nuts (key 17). 10. Place the packing springs onto the packing follower. Be sure the packing springs are properly stacked in the alternating sequence as shown in figure 4. Secure the packing springs with the O-ring. (The O-ring is a non-functional part and is used to retain the packing springs during assembly.) 11. Place the packing flange (key 10) over the valve shaft and studs. Rest the packing flange on top of the packing spring stack. Secure the packing flange with the packing nuts (key 101). Hand tighten the nuts. In general, the following tightening procedure applies to all ENVIRO-SEAL packing systems. Lubrication is required for the packing studs and nuts. Although it is important to properly lubricate the stud threads and internal nut threads, it is also important to properly lubricate the contacting face of the nut. See figures,, and 5 for lubrication locations. Please note the following definitions. You will need them for the next few steps. The target load is the point at which the Belleville springs are designed for optimum performance, when they are compressed to 85% of their maximum deflection, or nearly flat. At Maximum deflection the springs are 100% compressed, or completely flat. 1. You will obtain maximum benefit from your ENVIRO-SEAL packing system when you tighten the packing flange nuts and compress the Belleville springs to their target load. To obtain the target load of 85% compression of maximum deflection, perform the following: Tighten the packing flange nuts alternately and evenly, keeping the packing flange parallel with the valve flange (see figure 5), until the Belleville springs are compressed 100% (or completely flat). 5

6 B410- / IL Figure 4. Belleville Spring Stacking Order Do not use pneumatic air tools. Do not apply torque in excess of 5 ft lbs increments to any one flange nut at a time. Excessive over-torquing of the flange nuts may cause the studs to break. For PTFE packing, loosen each packing flange nut 1/ turn (180 of rotation). For Graphite packing, loosen each packing flange nut 1/4 turn (90 of rotation). The target load of 85% compression has now been reached. 1. Install the actuator. Refer to the appropriate valve and actuator instruction manuals when reconnecting the actuator to the valve. Under normal conditions, the packing nuts should not require re-tightening. However, when servicing, if the springs do not remain at the target load of 85% compression, retighten the packing box nuts according to step 1 above. 6

7 Parts Ordering Each valve assembly is assigned a serial number that can be found on the valve body. Refer to the serial number when contacting your Fisher Controls sales representative or sales office. When ordering replacement parts in retrofit or repair kits, refer to the valve assembly serial number and to the 11-character kit number for each kit required from the following list. B9116-B/DOC Parts Kits NOTES: 1 APPLY LUBRICANT THESE TWO SURFACES MUST REMAIN PARALLEL AS YOU ALTERNATELY AND EVENLY TIGHTEN THE PACKING NUTS. Figure 5. ENVIRO-SEAL PTFE Packing System Detail Other Considerations The following check is only valid for rotary ENVIRO-SEAL packing systems and sliding-stem ENVIRO-SEAL or HIGH- SEAL packing systems. When retrofitting an existing packing system or repacking a valve with ENVIRO-SEAL packing that has been in service, check the condition of the packing bore after you have removed the packing. An easy method for cleaning debris and minor imperfections from the bore is to use a a brake cylinder hone attached to an electric drill. This method will do a good job of cleaning the packing bore without changing the dimension of the bore. When you have completed this cleaning, a good guideline to use in checking the condition of the packing bore is the 0/0 rule. If less than 0% of the surface area of the bore is pitted and if no pits are deeper than mm (0.00 inch), then your packing will work fine. This does not need to be an exact measurement; visual inspection is adequate. If the packing bore does not meet this criteria, however, you should replace the valve or have your Fisher Controls service center repair it. Retrofit Kits Retrofit kits include all parts required for installation of the ENVIRO-SEAL packing system into existing highperformance butterfly valves. Retrofit kits are available for single PTFE or graphite packing. See table 4 for retrofit kit part numbers. Retrofit Kit Included Parts Key Description Quantity Anti-blowout follower Jam nut Packing stud Packing nut Packing flange Spring pack assembly Packing Set Anti-extrusion washer Packing box ring Tag Cable (1) () Not included in graphite packing kit.. Only 1 req d for 18-inch Class 00, 0-inch Class 150 and 4-inch Class 150. : Key 10, the spring pack assembly, is made up of the packing spring stack held in place by an O-ring on the packing follower. Repair Kits PTFE Repair kits include a single PTFE packing set and anti-extrusion washers. Graphite packing sets include graphite packing rings and carbon anti-extrusion rings. See table 4 for PTFE repair kit and graphite packing set part numbers. 7

8 Table 4. Retrofit and Repair Kit Part Numbers TYPES 85, A1A, A1D Valve Shaft ANSI Retrofit Kits Repair Kits Size, Diameter Class (1)(), Inches Inch (mm) PTFE Graphite PTFE Graphite Packing Set RRTYXRT00 RRTYXRT , 00 9/16 (14.) RRTYX B8816X , 00 11/16 (17.5) 6 150, 00 15/16 (.8) /16 (.8) /4 (1.8) /8 (8.5) /8 (41.) /4 (1.8) /8 (47.6) /8 (4.9) 00 (50.8) / (8.1) 00-1/4 (57.) /4 (44.5) 00-1/ (6.5) (50.8) / (6.5) Valve Size, Inches ANSI Class Shaft Diameter RRTYXRT01 RRTYXRT0 RRTYXRT0 RRTYXRT04 RRTYXRT05 RRTYXRT057 RRTYXRT06 RRTYXRT058 RRTYXRT059 RRTYXRT060 RRTYXRT061 RRTYXRT06 RRTYXRT06 RRTYXRT064 RRTYXRT065 RRTYXRT066 PTFE Retrofit Kits RRTYXRT051 RRTYXRT05 RRTYXRT05 RRTYXRT054 RRTYXRT055 RRTYX0001 RRTYX0001 RRTYX0001 RRTYX00014 RRTYX B8816X04 1B8816X08 1B8816X08 1B8816X1 1B8816X RRTYX RRTYXRT056 RRTYX00014 RRTYX00016 RRTYX00017 RRTYX00018 RRTYX B8816X RRTYX TYPE A11 Graphite Retrofit Kits PTFE Packing Kits RRTYX0001 RRTYX000 RRTYX00018 RRTYX000 Anti- Extrusion Ring () Graphite Packing Kits Packing Box Ring 9/16 (14.) 1B41X01 1B415X01 1B91X01 1B911X01 1B8816X0 1B9118X01 4 /4 (19.1) 14B988X01 14B989X01 1B7414X01 1B7418X01 1B8816X05 16A6084X /8 (8.6) 1B4105X01 1B4107X01 1B9078X01 1B9084X01 1B8816X10 1B9077X / (8.1) 1B989X01 14B985X01 1B746X01 1B7466X01 1B8816X14 16A6087X /4 (44.5) 1B985X01 1B986X01 1B9155X01 1B9159X01 14B541X0 1B9160X01 1-1/4 (57.) 14B1X01 14B978X01 14B647X01 14B64X01 14B541X05 1B187X / (6.5) 1B4111X01 1B4116X01 1B778X01 1B778X01 14B541X04 1B8709X01 16 (76.) 14B5651X0 14B5660X0 14B565X01 14B5656X01 14B541X06 18A4189X / (88.9) 14B579X04 14B576X04 14B570X01 14B574X01 14B541X07 14B575X01 1. Shaft diameter: Diameter through the packing box.. For larger shaft sizes, consult your Fisher Controls sales office or sales representative.. The Type A11 requires Anti Extrusion Rings. 8

9 A coupler is required for the following valve/actuator combinations when retrofitting an existing Type A1A or A1D with an ENVIRO- SEAL packing system. SHAFT DIAMETER, INCH (mm) 9/16 (14.) 11/16 (17.5) 15/16 (.8) 1-1/8 (8.5) 1-1/4 (1.8) Table 5. Coupler Part Number for Type A1A or A1D Valves with Selected Actuators VALVE SIZE, INCH Class 150/00 Class 150/00 Class 150/00 6 Class 150/00, Class Class 00, 1 Class Class 00, 1 Class Class 00, 1 Class Class 00, 1 Class Class 00, 1 Class Class 00, 1 Class Class 00, 1 Class Class 00, 1 Class Class 00, 1 Class Class 00, 1 Class Class 00, 1 Class 150 ACTUATOR TYPE Fisher Type 10 XL70 thru XL80 Fisher Type 10 XL45 thru XL680 D and S Series (Elomatic) SR15 Fisher Type 10 XL185 thru XL80 Fisher Type 10 XL45 thru XL680 Bettis HD 51, 71, 7 D and S Series (Elomatic) S0 Fisher Type 101 Size 6 Fisher Type 101 Size Fisher Type 10 XL680-XL170 5M Gear Bettis CB 15 Bettis CB 415 Bettis CB 40 Bettis CB 50 Bettis CB 55 Bettis CB 75 Bettis HD 51.5 Bettis HD 51, 71, 7 Fire Sentry Limitorque T-100 Fisher Type 101 Size 6 Fisher Type 101 Size Fisher Type 10 XL680-XL170 Bettis CB 55 Bettis CB 75 Bettis HD 51, 71, 7 Fire Sentry Limitorque T-100 Fisher Type 101 Size 6 Fisher Type 101 Size Fisher Type 10 XL680 - XL170 Bettis CB 55 Bettis CB 75 Bettis HD 51, 71, Bettis HD 71, 7 D and S Series (Elomatic) SR110 Limitorque SMB HOBC Limitorque T-50 Rotork 50 COUPLER PART NO. 1B1596X01 1B1907X01 1B1595X01 1B1600X01 1B1908X01 1B1597X01 1B1599X01 1B1610X01 1B1611X01 1B161X01 1B1601X01 1B160X01 1B1905X01 1B1605X01 1B1906X01 1B1604X01 1B1606X01 1B1609X01 1B160X01 1B1608X01 1B1607X01 1B160X01 1B161X01 1B164X01 1B1614X01 1B1617X01 1B1615X01 1B1619X01 1B1618X01 1B1081X01 1B108X01 1B1086X01 1B107X01 1B1077X01 1B1074X01 1B1075X01 1B1076X01 1B1084X01 1B146X01 1B1079X01 9

10 The existing couplers, listed below, can accommodate a retrofit with an ENVIRO-SEAL packing system. Coupler replacement is not required when retrofitting the valve/actuator combinations listed below. For information about couplers for the Type A11 Class 600 valves, please contact your Fisher Controls sales office or sales representative. SHAFT DIAMETER, INCH (mm) 9/16 (14.) 11/16 (17.5) 1-1/8 (8.5) 1-1/4 (1.8) Table 6. Coupler Part Number for Type A1A or A1D Valves with Selected Actuators VALVE SIZE, INCH Class 150/00 Class 150/00 Class 150/00 Class 150/00 8 Class 00, 1 Class Class 00, 1 Class 150 Bettis CB 15 Bettis CB 415 Bettis CB 40 Bettis CB 50 Bettis CB 15 Bettis CB 415 Bettis CB 40 Bettis CB 50 Bettis CB 40 Bettis CB 50 Bettis CB 40 Bettis CB 50 ACTUATOR TYPE COUPLER PART NO. V16014X01 V16015X01 V15188X01 V154549X01 V160108X01 V160107X01 V15171X01 V154600X01 V16009X01 V1601X01 V16008X01 V1601X01 10

11 11

12 ENVIRO-SEAL, HIGH-SEAL, Fisher, Fisher-Rosemount, and Managing The Process Better are marks owned by Fisher Controls International, Inc. or Fisher-Rosemount Systems, Inc. All other marks are the property of their respective owners. Fisher Controls International, Inc. 1991, 000; All Rights Reserved For information, contact Fisher Controls: Marshalltown, Iowa USA Cernay France Sao Paulo 0544 Brazil Singapore Printed in U.S.A.