Viking Clapper Assembly for 3 in. & 4 in. Model F1 & F2 Dry Valves is a spring-loaded assembly designed to provide a positive mechanical seal, filling a dry pipe fire sprinkler system with water when air pressure drops. This clapper assembly is a suitable replacement part for select 3 in. (76.2 mm) & 4 in. (101.6 mm) Dry Valves manufactured by Viking.
Viking Clapper Assembly for 3 in. & 4 in. Model F1 & F2 Dry Valves includes the following parts:
- A clapper assembly with ductile iron 64-45-12, PFTE coated steel, and bushings
- A stainless steel UNS-S30400 hex-head cap screw, size 3/8 in.-16 x 3/4 in. (12.7 mm)
- A stainless steel UNS-S30400 rubber retainer
- Ethylene propylene clapper rubber
To replace the existing clapper assembly in Model F1 & Model F2 Dry Valves, first ensure that the existing assembly is latched in the open position. Never reach into a dry pipe valve when the clapper is closed.
Hold the spring-loaded clapper arm assembly down and remove a retaining ring from one end of the clapper rod. Release the spring-loaded clapper arm assembly, allowing it to lock in the open position. Slide the rod out of the clapper arm assembly. Then, remove the existing clapper assembly and install this Viking Clapper Assembly for 3 in. & 4 in. Model F1 & F2 Dry Valves by following these steps in reverse order.
For more information, consult the repair and troubleshooting steps provided with your dry pipe valve.