Maintenance - Fisher EAS easy-e Instruction Manual

ES Valve
July 2017
Valves with ENVIRO‐SEAL live‐loaded packing or HIGH‐SEAL Heavy‐Duty live‐loaded packing will not require this initial
re‐adjustment. See the Fisher instruction manuals titled ENVIRO‐SEAL Packing System for Sliding‐Stem Valves or
Heavy‐Duty Live‐Loaded Packing System (as appropriate) for packing instructions. If you wish to convert your present
packing arrangement to ENVIRO‐SEAL packing, refer to the retrofit kits listed in the Parts Kits sub‐section near the end
of this manual.

Maintenance

Valve parts are subject to normal wear and must be inspected and replaced as necessary. Inspection and maintenance
frequency depends on the severity of service conditions. This section includes instructions for packing lubrication,
packing maintenance, trim maintenance, and ENVIRO‐SEAL bellows seal replacement. All maintenance operations
may be performed with the valve in the line.
WARNING
Avoid personal injury or damage to property from sudden release of pressure or uncontrolled process fluid. Before starting
disassembly:
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 the valve.
D 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.
D Vent the power actuator loading pressure and relieve any actuator spring compression.
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 additional measures that must be taken to protect against process
media.
CAUTION
Follow instructions carefully to avoid damaging the product surfaces, which could result in damage to the product.
Note
Whenever a gasket seal is disturbed by removing or shifting gasketed parts, a new gasket should be installed upon reassembly.
This is necessary to ensure a good gasket seal since the used gasket may not seal properly.
Note
If the valve has ENVIRO‐SEAL or HIGH‐SEAL live‐loaded packing installed, refer to instruction manuals ENVIRO‐SEAL Packing
System for Sliding‐Stem Valves, D101642X012, or HIGH‐SEAL Live‐Loaded Packing System, D101453X012, for packing
4
Instruction Manual
D100397X012