Advertisement
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
5. Remove the 12 cover screws (12).
6. The cover (11) and trim that is still connected may now be removed from the body. (It may be necessary to pry the valve open
as the diaphragm may bond itself to the cover (11) and valve body over time.)
C. Removing / Replacing the Check Diaphragm: (Refer to Figure 11.)
1. The check diaphragm (10) may be lifted from the valve body (1).
2. If necessary, replace the check diaphragm (10).
D. Inspecting the Prime Chamber and Coupling for leaks: (Refer to Figure 11.)
If desired, it is possible to set the G-4000P Valve and inspect for leaks with the cover (11) removed.
1. Slowly open the prime valve.
2. With prime water established, partially open the main water supply control valve.
3. Visually inspect the inside of the G-4000P Valve for leaks.
E. Removing / Replacing the Prime Coupling: (Refer to Figure 11.)
1. Open the 1/2" union on the prime line.
2. Using a wrench on the flats of the coupling (7), remove the coupling (7) from the valve body (1).
3. Inspect the coupling (7) and two O-rings (5 & 6). Replace if necessary, using the instructions in O-Ring Replacement Bulletin
F_120611.
F. Removing / Replacing the Prime Chamber Assembly: (Refer to Figure 11.)
1. The prime chamber assembly (4) is now held in place by two flanges on the outside diameter of the assembly. Slide the prime
chamber assembly (4) toward the prime line and remove from the body.
2. Inspect and replace if necessary.
3. Inspect the seat. The seat should be clean and free of foreign material. If the seat is damaged, the G-4000P Valve must be
replaced.
G. Re-Assembling the Valve: (Refer to Figure 11.)
1. Place the prime chamber assembly (4) in the valve body (1). Make sure the two flanges are positioned in the groove.
2. Thread the prime coupling (7) into the valve body (1). Make sure the end of the prime coupling (7) is inserted into the prime
chamber assembly (4).
3. Tighten the 1/4" socket set screw (8).
4. Lay the check diaphragm (10) into the valve body (1).
5. Position the cover (11) onto the valve body (1), and install and tighten the cover screws (12).
6. Re-install any trim that was removed.
7. Place the valve in service by following the steps in Section 4.F.
8. AVAILABILITY
The Viking Model G-4000P Valve is available through a network of domestic and international distributors. See the Viking Corp. Web
site for closest distributor or contact The Viking Corporation.
Form No. F_112008
18.10.25
TECHNICAL DATA
P65
4" MODEL G-4000P
DOUBLE INTERLOCK PREACTION
WITH ELECTRIC/PNEUMATIC RELEASE
Page 9 of 12
Advertisement
