Install Instructions

FOR V5055, V5097 GAS VALVES
95-6981—5 2
Fig. 1. Placement of valve and bonnet seals.
Fig. 2. Placement of valve and bonnet
seals in the four-inch valve.
10. After positioning the bonnet assembly, replace the bolts
removed in step 6.
NOTE: When replacing the bonnet assembly on the 4-inch
valve, draw it evenly into the valve body. Finger-
tighten the eight bolts. Draw the bonnet assembly
into the valve by tightening, in order, bolts 1, 5, 7 and
3 (two turns each). See Fig. 3. Repeat until the
bonnet assembly is seated. Tighten the remaining
bolts. Torque the bolts as follows:
— 3/4 in. (19 mm) to 1-1/2 in. (38 mm) valves:
55 in.-lb.
— 2 in. (51 mm) to 4 in. (102 mm) valves: 75 in.-lb.
11. Remount the actuator.
12. Securely tighten the set screws (50 to 60 inch-pounds).
13. Replace the crank arm assembly if disconnected in
step 3.
14. With the gas still off, cycle the actuator to check for
proper mechanical operation.
Fig. 3. Replacement 4-inch valve bonnet assembly.
CHECKOUT
IMPORTANT
Both bonnet seal and seat leak checks must be
performed after installation.
Bonnet Seal Check
After the bonnet assembly is reinstalled, turn on the gas at the
manual valve and check for gas leakage around the bonnet
seal. Paint the seal area with a rich soap and water solution.
Bubbles indicate a gas leak. If a leak is detected, check to see
that the bonnet screws are tight. If necessary, turn off the gas
again and remove the bonnet to make sure the seals are
properly seated.
Tightness of Closure Check
Instructions for testing tightness of closure of gas safety
shutoff valves on burner startup (by qualified personnel).
See Fig. 4.
M9578
VALVE SEAL
BONNET SEAL
SMALL SEAL
LARGE SEAL
M9579
18
45
2
3
7
6
M9582