Block Valves: Instruction Manual for All Sizes
1-18
D
R
A
FT 9/
21
/04
10. Place the quad ring (7) in its groove.
11. Push the piston cup (5) into the air cylinder (6) with the rubber-coated side down.
12. Place the air cylinder (6) onto the valve stem (8) with the rubber side of the piston cup
(5) facing up.
13. Thread the stop nut (4) onto the valve stem (8).
14. Using a torque wrench, torque the stop nut to 45 inch-pounds.
15. Push the red visual indicator cap (3) onto the valve stem (8).
16. Place the O-ring (13; 15) into its groove on the valve body.
17. Place the air cylinder/bellows assembly into the valve body.
18. Put the air cylinder cover (1) into position and secure the assembly with cap screws (2).
19. Mount the solenoid assembly to the air cylinder and tighten with a 5/8" open end
wrench.
1.3.5.5 Position Indicator
This discussion details how to disassemble the position indicator so that:
❑
A defective microswitch can be fixed
(see “Replacing the Defective Microswitch” on page 1-21)
or
❑
A new position indicator can be installed using a kit
(see “Installing the Position Indicator Kit” on page 1-22).
In either case:
1. Disassemble the valve as explained in “Disassembly/Reassembly” on page 1-21.
2. Perform the procedure required.
3. Reassemble the valve as explained in “Disassembly/Reassembly” on page 1-21.
4. Once either procedure is complete, the switches can be tested (see “Test Procedure” on
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