DRV-1 – the lightest & smallest trimmed dry valve

The Viking model DRV-1 dry valve is a latching differential valve used to separate the water supply from the dry pipe sprinkler system. The valve head provides a positive mechanical seal within the valve, separating the supply water pressure from the air in the system. The differential design allows a low system air pressure to control a higher water supply pressure. When a sprinkler activates, it causes the air pressure in the dry pipe system to drop enough to eliminate the pressure differential. This triggers the valve to open, allowing water to enter the system.

The valve also operates a water motor alarm and/or an electric pressure alarm switch. The Viking model D-2 accelerator can be used to speed up the operation of the valve on large capacity systems or where faster action is required.