Instruction Manual

Instruction Manual
D103803X012
Z500 Valve
April 2015 - rev B
10
Figure 2. Bolting Tightening Pattern
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Valve Leaking through Ball or Seating Area
D Valve body ID or bore is clogged-- Flush or clean valve ID and try to cycle valve.
D Valve is not fully closed-- Close valve, taking care not to over torque.
D Actuator travel stops are not set correctly-- Set stops and cycle, checking for leaks.
D Seat or Ball is damaged-- Contact your Emerson Process Management sales office
for repair.
D Belleville spring is collapsed — Contact your Emerson Process Management sales office for repair.
Note
If you need additional trouble-shooting assistance, please contact your Emerson Process Management sales office.
Packing Replacement
WARNING
Avoid personal injury from sudden release of process pressure. Before performing any maintenance operations:
D Do not remove the actuator from the valve while the valve is still pressurized.
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 Always wear protective gloves, clothing, and eyewear when performing any maintenance operations.
D 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.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.