Dry pipe valve

The Inbal Dry Pipe Valve is specifically designed to control the flow of water to the dry pipe sprinkler system and to provide actuation of fire alarms when the system operates. The Inbal Dry Pipe Valve is used to separate the water supply from the dry pipe sprinkler system, by providing a bubble tight seal as long as the valve is in a set position. The Inbal Automatic Water Control Valve which is used in this dry pipe system is a pressure operated, sleeve actuated, axial valve designed for use in fire protection systems. The trim design allows low air pressure supply to control a higher water supply pressure.

When a sprinkler operates, the air pressure in the piping system drops sufficiently to open the Inbal Dry Pipe Valve, allowing water to flow into the dry pipe system to be discharged from the fused sprinkler. The operation of the Inbal 700DG-04E activates a water motor alarm and/or an alarm pressure
switch. The Inbal Dry pilot Valve opens also when a hydraulic emergency release is operated. As soon as the sprinkler piping is reset, the Inbal Dry Pipe Valve resetting is merely done by activating the reset knob.

The control trim includes pilot valves, actuators, accessories, fittings and gauges to provide for proper operation, either by vertical or horizontal installation.
The standard material Inbal Dry Pipe Valves are rated to 300 psi (21 bar) and are available in sizes 11⁄2″ (40 mm) to 12″ (300 mm). The valves have threaded, flanged, grooved, or wafer inlet and outlet ends.

The only moving part in the Inbal Dry Pipe Valve, when it operates, is the reinforced sleeve which forms a drip- tight seal with the corrosion resistant core. It has a smooth opening to prevent any water hammer in the piping system.