Instruction Manual
D100381X012
HS Valve
June 2019
3
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
Before installing the valve, inspect it for shipping damage and be certain the valve cavity and adjacent pipelines are
free of any foreign material that may damage the seating surfaces. If continuous operation is required during
maintenance, install a three-valve bypass around the valve.
HS valves may be installed in any position, but the standard position is with the valve in a horizontal run of pipe with
the actuator above the valve.
When installing the valve, use accepted piping and welding practices. For flanged valves, use a suitable flange gasket
between the valve and the pipeline flanges. Orient the valve so that flow will be in the direction indicated by the flow
arrow.
If the actuator was not attached to the valve before installation, or if valve plug travel has not been adjusted, refer to
the Mounting Actuator and Adjusting Travel section in this manual and the appropriate actuator instruction manual.
Maintenance
Valve parts, such as the packing, valve plug, seat ring, and guiding bushings, 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 disassembly necessary for inspection or replacement of parts. All
maintenance operations may be performed with the valve in the line.
WARNING
D
Avoid personal injury or property damage 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
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
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 precompression.
D
Use lock-out procedures to be sure that the above measures stay in effect while you work on the equipment.
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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.
Packing Lubrication
If a lubricator or lubricator/isolating valve (figure 3) is provided for PTFE/composition or other packings that require
lubrication, it will be installed in place of the pipe plug. Use a good quality silicon-base lubricant. Packing used in
oxygen service or in processes with temperatures over 500
°
F (260
°
C) should not be lubricated. To operate the
