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9.3.2
Cylinder disassembly NPS 16 valve only
Important
The 16" valve does NOT disassemble as a complete assembly. The first step is to remove the cylinder
head from the valve body.
Prerequisites
The construction of the NPS 16 valve cylinder assembly is different from all other valve
cylinder assemblies and requires different procedures. The following tools are needed to
disassemble and reassemble the control valve.
•
Socket wrench
•
Adjustable wrench
•
Extended allen wrench set
•
Mallet and cold chisel
•
Appropriate lifting gear and sling
•
(2) all thread rods, 3/4" no. 10x18"-24" long
•
(2) 3/4" no. 10x2" bolts with 3/4" flatwashers
•
Hand pump
•
Drip pan
•
(3) hoist rings 1"-8" nnc 10,000 lb, part number 1-504-90-094
Procedure
1.
Completely block all product flow to the valve and drain the process line.
2.
Disconnect "Y" port on top of cylinder head and relieve pressure in the valve.
SPRING FORCE HAZARD
Use extreme caution when removing the cylinder head from the valve body.
Failure to disassemble or reassemble the valve without carefully being aware of the
force of the spring against the cylinder head may result in death, serious injury or
damage to the equipment.
SPRING TENSION HAZARD
Do not remove jack screws (long bolts). Jack screws are spring tension retaining devices
and must NOT be tampered with. Follow disassembly procedure above.
Failure to comply with instructions may result in serious personal injury or damage to
the equipment.
User manual
WARNING!
WARNING!
USER MANUAL
Planned maintenance
89
89
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