D10979

75 - 150mm Pressure Operated Direction Valve

Note: This Valve is available for marine use only

General Information

Supplied in globe or angle pattern, the valve is pressure operated with a manual hand-wheel over-ride. It is designed to be used in both CO2 and halocarbon fire protection systems. Electrical switching of actuation is provided giving visual indication when the valve is in the full open position.

When pressure is applied to the actuator port the actuator piston moves upward initially opening the pilot valve thereby evacuating the pressure in the internal area of the balance piston. Further movement ensures full opening of the main valve. As the valve opens a spring-loaded cam attached to the centre stem moves up to actuate a switch indicating that the valve has opened.

An 1/8” BSPT or 1/8” NPT outlet port (dependant on customer requirements) is provided to operate other equipment once the valve is open.

Manual Hand-wheel Operation

Turning the hand-wheel anticlockwise initiates the opening of the valve. Turning further fully opens the valve. Turning the hand-wheel fully clockwise will close the valve

Pressure Operation

A 1/8” BSPT or 1/8” NPT actuator port (dependant on customer requirements) is provided in the side face of the valve bonnet. When a pressure of at least 160PSI is applied to this port, the valve will fully open. When pressure is removed the valve will automatically close.

Basic Specifications

	Minimum	Maximum
Operating Temperature	-20 degrees C	+50 degrees C
Pressure Range	7 BAR - 100 PSI	140 BAR - 2030 PSI
Control Pressure	11 BAR - 160 PSI	140 BAR - 2030 PSI