TECHNICAL DATA
2” MoDEL G-2000 Dry vALvE
rISEr ASSEMBLy
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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: [email protected]
visit the viking website for the latest edition of this technical data page www.vikinggroupinc.com.
Form No. F_011110 17.04.27 Rev 17.1
5. Remove the 8 cover screws.
6. The cover and trim that is still connected may now be removed from the valve body. (It may be necessary to pry the valve
open as the diaphragm may bond itself to the cover and body over time.)
B. removing / replacing the Check Diaphragm
1. The check diaphragm may be lifted from the valve body.
2. If necessary, replace the check diaphragm.
C. Inspecting the Prime Chamber and Coupling for Leaks
If desired, it is possible to set the G-2000 Dry Pipe Valve and inspect for leaks with the cover removed.
1. Remove the Model A-1 Differential Valve from the prime line and temporarily install a pipe plug.
2. Slowly open the prime valve. Confirm that the valve is primed by reading the prime pressure gauge.
3. With prime water established, partially open the main water supply control valve.
4. Visually inspect the inside of the dry pipe valve for leaks.
5. Close the main water supply control valve.
D. removing / replacing the Prime Coupling
1. Open the 1/2” union on the prime line.
2. Using a wrench on the flats of the coupling, remove the coupling from the valve body.
3. Inspect the coupling and O-rings. Replace if necessary, using the instructions in O-Ring Replacement Bulletin F_120611.
E. removing / replacing the Prime Chamber Assembly
1. The prime chamber assembly is now held in place by two flanges on the outside diameter of the assembly. Slide the prime
chamber assembly 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-2000 Dry Pipe Valve
must be replaced.
F. re-Assembling the valve
1. Verify that the prime piston is fully extended downward.
2. Place the prime chamber assembly in the valve body. Make sure the two flanges are positioned in the groove.
3. Thread the prime coupling into the valve body. Make sure the end of the prime coupling is inserted into the prime chamber
assembly.
4. Lay the check diaphragm into the valve body.
5. Position the cover onto the valve body, and install and tighten the cover screws.
6. Re-install any trim that was removed.
7. Place the valve in service by following the steps in Section 4.G.
7. AvAILABILITy
The Viking Model G-2000 Dry Valve Riser Assembly is available through a network of domestic and international distributors. See the
Viking Corp. Web site for closest distributor or contact The Viking Corporation.
