Technical data

TECHNICAL DATA
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: [phone] Technical Services 877-384-5464 Fax: [phone] Email: [e-mail]
PREACTION SPRINKLER
SYSTEM
Page 58
February, 2010
Halar
®
Coating Repair
If the Halar
®
coating becomes chipped, immediately repair the damaged area to inhibit the potential
for corrosion. Follow instructions below:
1. Wipe clean and prepare the area to be repaired as instructed.
2. Using a hand held torch, gently heat the Halar
®
coating around the area needing repair to the
melting point of the Halar
®
.
3. Allow the heated Halar
®
to flow together.
4. Allow the coating to cool as directed in the instructions.
Valve Disassembly
1. Remove the valve from service.
a. Close the main water supply control valve and priming valve.
b. Open the auxiliary drain valve.
c. Release the pressure in the priming chamber by opening the emergency release valve.
2. Disconnect and remove necessary trim from the cover and remove cap screws.
For 2” through 8” deluge valves only:
3. Lift cover from body.
4. Remove the clapper assembly by lifting it from body.
5. Inspect seat. If replacement is necessary, do not attempt to separate it from body. The seat is not
removeable.
6. To replace the diaphragm rubber, remove the circle of screws. Remove the clamp ring. The dia-
phragm rubber can be removed.
7. To replace the seat rubber assembly, the clapper assembly must be removed from the valve (see
Step 3 above). Remove the circle of screws. The seat rubber assembly can be removed.
For 1-1/2” deluge valves only:
3. Lift the cover from the spacer.
4. Remove the spacer and the rolling diaphragm and clapper assembly from the body.
5. To replace the clapper assembly, remove the screw and sealing-washer assembly. Install the new
clapper assembly and discard the old.
6. To replace the lower diaphragm, remove the screw and sealing-washer assembly, and the clap-
per. Install the new diaphragm and discard the old.
7. To replace the upper diaphragm rubber, remove the screw and sealing-washer assembly, and the
clamp plate. Install the new diaphragm and discard the old.
NOTE: PRIOR TO INSTALLING A NEW DIAPHRAGM RUBBER, SEAT RUBBER OR LOWER DIA-
PHRAGM, MAKE CERTAIN THAT ALL SURFACES ARE CLEAN AND FREE OF FOREIGN MATTER.
THE SEAT MUST BE SMOOTH AND FREE OF NICKS, BURRS OR INDENTATIONS.
NOTE: THE CLAPPER RUBBER MUST BE INSTALLED WITH THE RIDGE ON THE CLAPPER
RUBBER FACING TOWARDS THE CLAPPER.
Valve Reassembly
1. Prior to reassembly, flush the valve of all foreign matter. The valve seat must be clean and free
from all marks and scratches.
2. To reassemble, reverse disassembly procedure.
For the 1-1/2” deluge valves only:
3. When installing diaphragms, care must be taken to assure all bolt holes are aligned. Also, the
fabric side (rough side) of the diaphragms must be positioned toward piston. Prior to tightening
screws, install the clapper assembly into the spacer.
a. Insert the upper diaphragm through the opening in spacer from the bottom surface of the
spacer to the top. The clapper assembly must be toward the inlet chamber of the valve.