WARNING: Personal injury may result if this manual is not read and strictly adhered to.
WARNING: This valve must be installed by a qualified installer strictly in accordance with the Installation Instructions and local codes and regulations. Valves installed incorrectly may not operate as intended and could cause property damage or personal injury.
WARNING: After completing the Installation Instructions, make sure the valve is installed in the closed position.
DESCRIPTION:
The Grinnell E-2 dry pipe valve is designed for use in dry pipe sprinkler systems where freezing conditions prevail or where it is necessary to prevent water damage from accidental drainage of the system due to a broken sprinkler or piping. The valve is designed for use with compressed air at supply pressure of a maximum 250 psi.
The E-2 is of the angle type with semi-steel body, bronze trim and brass clapper and seat assembly. The valve has an external trip valve and a fusible alloy link located above the main valve seat.
INSTALLATION:
Refer to Installation Instructions for comprehensive installation instructions.
OPERATION:
Under Normal Conditions
When the system air pressure is maintained above the tripping pressure of the fusible link, the valve is held closed. If a sprinkler opens (or piping breaks) and air is lost from the system, the pressure differential across the fusible link forces the link to rupture and release the trip valve allowing water to flow through the main valve and out of the open sprinkler.
Under Fire Conditions
When heat from a fire causes a sprinkler in the system to fuse the fusible link and release the trip valve, water pressure from the supply side will open the main valve and allow water to flow through the system.
CLOSING:
Manually
Turn the valve handwheel clockwise until closed.
Water Pressure Automatically
For automatic water-sealed operation refer to installation and maintenance instructions for proper filling and priming.
Air Pressure Automatically
For air-sealed systems the main valve will automatically re-seat as the air supply pressure is increased (restored) to 1-2 psi above designed trip pressure.
DRAINAGE:
Refer to Installation Instructions for complete drainage instructions.
INSPECTIONS AND MAINTENANCE:
Inspections and Maintenance should be performed at intervals established by the Authority Having Jurisdiction (AHJ).
At a minimum, perform semi-anually:
- Inspect to verify system air (pressure) is 1-2 psi above listed trip pressure.
- Remove and inspect the trip valve and verify that the O-ring and sealing surfaces are in good condition and free of debris.
- Check fusible link to verify that it is intact and free of corrosion.
- Remove the test caps and verify the sprinkler drain valves operate freely.
- Exercise main valve by briefly turning the handwheel counter-clockwise to lift clapper and then reclose.
- Replace test caps.
Refer to Installation Instructions for maintenance procedures after a fire or waterflow alarm.
STORAGE AND HANDLING:
- Storage temperature range: -4°F to 140°F (-20°C to 60°C).
- Do not exceed 75 psi during handling with system drained.
