EMERSON Installation Instructions RPACKXRT032, 042, 052, RPACKX00212, 222

Installation Instructions

Design A, E, EH, HP, YD, & YS

ENVIRO-SEAL™ PTFE Packing

March 2021

Design A, E, EH, HP, YD, and YS ENVIRO-SEAL PTFE Packing for 3/4-inch, 1-inch, and 1-1/4-inch Stem Sizes

Use these instructions to install ENVIRO‐SEAL packing procedures. Complete all valve maintenance before in valves that have standard packing or when installing the ENVIRO‐SEAL packing system into the inspecting or replacing ENVIRO‐SEAL packing. For bonnet.

additional information, see Fisher™ ENVIRO‐SEAL

2. If a retrofit kit is being installed in place of the

Packing Systems for Sliding-Stem Valves Instruction

original packing, it may be necessary to remove the

Manual (D101642X012).

old studs from the valve because they are too short. Check stud length by installing the packing and the WARNING spring pack assembly using the following assembly procedures, and try installing the packing nuts. If the packing nuts will not start on the threads of the

Avoid personal injury or property damage from sudden

studs, it will be necessary to install new studs and

release of process pressure or uncontrolled movement

of parts. Before performing any maintenance nuts from the retrofit kit.

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 Ensure that the packing box parts are assembled in the valve. correct order. Packing parts can not function properly if the Belleville springs or other packing parts are not stacked

Use bypass valves or completely shut off the process to

correctly.

isolate the valve from process pressure. Relieve process pressure from both sides of the valve. Drain the process media from both sides of the valve.

3. Use the drawing provided to ensure that the

Vent the pneumatic actuator loading pressure and

packing parts are assembled in the correct order.

relieve any actuator spring precompression. If a

Install the ENVIRO‐SEAL packing parts into the

spring-return actuator is used, be sure the actuator is

packing box.

resting on its travel stop before disconnecting the stem connector. 4. Install the spring pack assembly (key 217), which

Use lock‐out procedures to be sure that the above includes the attached springs, and packing flange measures stay in effect while you work on the (key 201), on the stem. Install the nuts and hand

equipment. tighten them.

If you are installing the system in a valve that is still

connected to an actuator, remove the actuator from Lubrication is required for the packing studs and nuts. the valve to provide sufficient space to install the Although it is important to properly lubricate the stud packing assembly. Refer to the appropriate valve and threads and internal nut threads, it is also important to actuator instruction manuals to remove the actuator. properly lubricate the contacting face of the nut.

1. Carefully remove the old packing parts from the packing box. The surface condition of the valve 5. You will obtain maximum benefit from your stem and the packing box wall is critical in obtaining ENVIRO‐SEAL packing system when you tighten the a good seal. If the valve stem needs to be replaced, packing flange nuts and compress the Belleville or any other valve part, refer to the appropriate springs to their “target load.” The target load is the valve instruction manual for replacement point where the Belleville springs are designed for

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