Installation - Emerson Fisher Enviro-Seal Series Instruction Manual

Instruction Manual
D101642X012

Installation

ENVIRO-SEAL packing systems are designed for quality performance over extended periods. This longevity allows for
packing maintenance to be performed as it should be, at regularly scheduled plant outages or turn-arounds.
Use these instructions to install ENVIRO-SEAL packing in valves that have standard packing or when inspecting or
replacing ENVIRO-SEAL packing.
If you are changing the packing system material to a different material, such as PTFE to Graphite ULF, it is good
practice to review actuator sizing, as packing friction will change. See tables 4, 5, and 6 for information on packing
friction.
WARNING
Avoid personal injury from sudden release of process pressure or uncontrolled movement of parts. Before performing any
maintenance operations:
D Do not remove the actuator from the valve while the valve is still pressurized.
D Always wear protective gloves, clothing, and eyewear when performing any maintenance operations to avoid personal
injury.
D 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.
D Use bypass valves or completely shut off the process to 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.
D Vent the power actuator loading pressure and relieve any actuator spring precompression.
D Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.
D The valve packing box 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, or when
loosening the packing box pipe plug.
D Check with your process or safety engineer for any other hazards that may be present from exposure to process media.
Figure 3. ENVIRO-SEAL Packing Assembly Procedure
HEX NUT
PACKING
FLANGE
STUD
A6143
ALTERNATE FROM ONE HEX NUT TO
THE OTHER AS YOU TIGHTEN
THESE TWO SURFACES MUST REMAIN PARALLEL
AS YOU TIGHTEN THE HEX NUTS
BONNET
ENVIRO-SEAL Sliding-Stem Valves
July 2017
3