V46 and V47 Repair Parts and Service Instructions
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1. Decrease the compression on the main spring by turning the range adjusting screw clockwise until it stops.
Using excessive force to turn the screw beyond the stop point strips the thread.
2. Remove the four screws holding the spring housing and remove the entire housing assembly. See Figure 2.
3. Remove the valve assembly screw (Figure 3).
4. Remove the guide post and old diaphragms (Figure 3).
5. Remove the sensing element and the diaphragms between it and the valve body (Figure 3).
6. Pull the disc, disc retainer, and extension sleeve assembly from the valve (Figure 3).
7. Remove the old valve seat and replace it with the new valve seat (Figure 3). (A seat wrench is not provided for
2 and 2-1/2 in. valves. Use 1-1/2 and 1-15/16 in. hex stock, respectively.)
8. Replace the three diaphragms between the sensing element and valve body (Figure 4).
9. Replace the guide plate gasket and bellows sealing ring (Figure 4).
10. Assemble the sensing element to the valve body with the bellows push rod, new diaphragms, guide plate
gasket, and bellows sealing ring in place.
11. Assemble the new disc, disc retainer, and extension sleeve.
a. Apply a small amount of grease to the grooves on the bottom of the new extension sleeve and the top of
the new disc retainer. Place one
O-ring into each groove.
b. Place the subassembly into the valve.
12. Place two new diaphragms on the spring housing end of the valve body.
13. Screw the valve assembly screw through the guide post and into the bellows push rod (Figure 3).
14. Place the spring housing assembly over the guide post and secure in place with the four housing screws.
15. Adjust the valve to desired opening point. Then manually flush the valve. See the
section.
Risk of Personal Injury.
Protect eyes. Do not remove the two screws on the sides of the spring housing. Disassembly can cause a
compressed spring to fly out and may result in serious eye injuries, blindness, or other severe injury.
