Emerson A81- Manuals

Instruction Manual D103302X012 A81 Valve May 2011 5 sizes. If piping with a smaller inner diameter than specified above is connected to the valve, measure carefully to be certainthe disk rotates without interference before putting the valve into operation. 5. Flow is in the standard direction when t...

Instruction Manual D103302X012 A81 Valve May 2011 6 Table 5. Stud Bolt Data VALVE SIZE WAFER STYLE AND SINGLE FLANGE STYLE WITH THROUGH DRILLED HOLES PN 10 PN 16 PN 25 PN 40 DN No. of Stud Bolts Size Dia & Thread, mm A Dimen‐ sion, mm No. of Stud Bolts Size Dia & Thread, mm A Dimen‐ sion, mm...

Instruction Manual D103302X012 A81 Valve May 2011 7 WARNING An A81 valve body is not necessarily grounded when installed in a pipeline. If the valve is used in a flammable or hazardousatmosphere or for oxygen service, an explosion could result due to a discharge of static electricity from the valvec...

Instruction Manual D103302X012 A81 Valve May 2011 8 Figure 4. Packing Arrangement Details STANDARD PACKING PTFE V‐RING GRAPHITE RIBBON GE39901‐A GE39986‐A SINGLE PTFE PACKING GE40113‐A ENVIRO‐SEAL PACKING GRAPHITE PACKING GE40118‐A THESE TWO SURFACES SHOULD REMAIN PARALLEL AS YOU ALTERNATELY AND EVE...

Instruction Manual D103302X012 A81 Valve May 2011 9 WARNING Avoid personal injury and property damage from sudden release of process pressure or bursting of parts. Before performingany maintenance operations: D  Do not remove the actuator from the valve while the valve is still pressurized. D  Alway...

Instruction Manual D103302X012 A81 Valve May 2011 10 For valves with the ENVIRO‐SEAL packing system: Optimum performance of the ENVIRO‐SEAL packing system is obtained when the Belleville springs are tightened totheir “target load.” The target load is the point where the springs are compressed to 85%...

Instruction Manual D103302X012 A81 Valve May 2011 11 2. Remove the actuator per instructions in separate actuator instruction manuals, then remove the cap screws and nuts (keys 35 and 36). Remove the clamp (key 130, figure 3) if the strap (key 131, figure 3) is used. 3. Remove the packing flange nut...

Instruction Manual D103302X012 A81 Valve May 2011 12 Figure 5. Orientation of Bearing Tabs BEARING TAB BEARING TAB BACKSIDE OF VALVE 3. Loosen the two packing hex nuts evenly to remove spring tension, then remove the nuts.4. Remove the packing flange and spring pack assembly. The spring pack assembl...

Instruction Manual D103302X012 A81 Valve May 2011 13 Key numbers in this procedure are shown in figure 9 unless otherwise indicated. 1. Isolate the control valve from line pressure, and relieve pressure from the valve body. Shut off and disconnect all lines from the power actuator. WARNING The edges...

Instruction Manual D103302X012 A81 Valve May 2011 14 1. Isolate the control valve from the line pressure, release pressure from both sides of the valve body, and drain the process media from both sides of the valve. If using a power actuator, also shutoff all pressure lines to the poweractuator, rel...

Instruction Manual D103302X012 A81 Valve May 2011 15 Assembly WARNING Do not lubricate bearings that will be used for oxygen service, or where the lubrication is incompatible with the processmedia. Any use of lubricant can lead to the sudden explosion of media due to the oil/oxygen mixture, causing ...

Instruction Manual D103302X012 A81 Valve May 2011 16 Figure 7. Sectional of Typical Valve Body ACTUATOR END OF SHAFT POSITION INDICATION MARK INDICATESAPPROXIMATE DISK POSITION CCW DISK ROTATION TO OPEN X2 X1 Figure 8. Follower Spring/Spring Seat Assembly FOLLOWER SPRING SEAT(KEY 9) FOLLOWER SPRING(...

Instruction Manual D103302X012 A81 Valve May 2011 17 1. If new bearings (key 6) are required, install and orient them in the valve body, as shown in figure 5. Ensure the bearings are fully seated, contacting the inside diameter of the valve body. 2. Insert the disk into the valve body as shown in fi...

Instruction Manual D103302X012 A81 Valve May 2011 18 Actuator Mounting With the valve body out of the line, mount the actuator on the valve body in accordance with the instructions in theactuator instruction manual. Mount the actuator yoke to the valve body, and tighten the actuator‐mounting capscre...

Instruction Manual D103302X012 A81 Valve May 2011 19 Parts Kits Retrofit Kits for ENVIRO‐SEAL Packing Retrofit kits are available for replacing the packing in an existing valve with an ENVIRO‐SEAL packing system. These kitsare available for single PTFE or graphite packing. All parts required for ins...

Instruction Manual D103302X012 A81 Valve May 2011 20 Parts List Note For part numbers not shown, contact your Emerson ProcessManagement sales office. Key Description Part Number  1 Valve BodyIf you need a new valve body, please order by valvesize, serial number and desired material.  2 Seal Retainer...

Instruction Manual D103302X012 A81 Valve May 2011 21 Figure 9. Fisher A81 Valve Assembly GE27325_D SOFT Key Description Part Number  17 Blind Flange  18 Stud  19 Hex Nut  20 Drive Screw  21 Nameplate  22 Mfg Label  23* Packing Box Ring S31600  DN 50 (NPS 2) 16A6082X012   DN 80 (NPS 3) 16A6083X012   ...

Instruction Manual D103302X012 A81 Valve May 2011 22 Figure 10. Fisher A81 Seal Assembly Detail GE27325_D_2 FLOW RING CONSTRUCTION ASSEMBLY SOFT SEAL CONSTRUCTION ASSEMBLY METAL SEAL CONSTRUCTION ASSEMBLY Key Description Part Number   DN 100 (NPS 4) 13B8816X052   DN 150 (NPS 6) 13B8816X092   DN 200 ...