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MODEL 700 CONTROL VALVE
Figure 9-1: Using the piston to remove the seat ring from the 150/300 lb
cylinder
1. Cylinder
3. Seat ring
4. Piston
9. Turn the cylinder over with the ports on top when removing the high pressure seat
ring. Remove the set screw from the seat ring. Turn the seat ring counterclockwise
to remove the seat ring and then remove the O-ring from the cylinder.
9.3.2
Cylinder disassembly NPS 16 valve only
Important
The 16-in 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,
¾
-in no. 10x18-in to 24-in long
•
(2)
¾
" no. 10x2-in bolts with
¾
-in flatwashers
•
Hand pump
User manual
Planned maintenance
P/N 3-9008-553
November 2020
User manual
51