20 - 50mm Pressure Operated Direction Valves - D10971
General Information
Supplied in single or double inlet configurations this range of valves is designed to give maximum versatility of operation and can be used in CO2 or halocarbon systems.
These valves can be operated either by using independent pilot pressure or manifold pressure and can be fitted with a hand-wheel over-ride, according to customer specification. In addition the unit can be actuated electrically by a protractor type Metron.
In the case of the pilot pressure type, when control pressure is applied to the actuator port, pressure is ported through to the lower side of the lift piston, thereby initiating the opening of the pilot seat followed by the main valve seat.
Using manifold pressure for operation, the unit is fitted with a transfer valve block to which can be attached any one of our range of actuators. In the event of actuation, gas pressure is ported through from the manifold area to the lower side of the lift piston, thereby initiating the opening of the pilot seat followed by the main valve seat.
Basic Specifications
| BSPT P.O.D. Valves. | NPT P.O.D. Valves. | |||
| Part No | Inlet/Outlet | Act. Port | Inlet/Outlet | Act. Port |
| D10971/20 | 3/4" BSPT | 1/8" BSPT | 3/4"NPT | 1/8" NPT |
| D10971/25 | 1" BSPT | 1/8" BSPT | 1" NPT | 1/8" NPT |
| D10971/32 | 1 1/4" BSPT | 1/8" BSPT | 1 1/4" NPT | 1/8" NPT |
| D10971/40 | 1 1/2" BSPT | 1/8" BSPT | 1 1/2" NPT | 1/8" NPT |
| D10971/50 | 2" BSPT | 1/8" BSPT | 2" NPT | 1/8" NPT |
| 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 |
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The P.O.D. Valves can be supplied in the following optional configurations. Please refer to relevant sections below for operating instructions. |
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| Single or double inlet | The valve can be supplied in single or double inlet configurations. Ports may be supplied with either BSPT or NPT threads to suit the manifold. |
| Manual hand-wheel | Turning the hand-wheel anticlockwise (as seen from above) initiates the opening of the valve. Turning further fully opens the valve. Turning the hand-wheel fully clockwise will close the valve |
| Pressure operation only | A 1/8” BSPT or 1/8” NPT actuator port (dependant on customer requirements) is provided in the side face of the valve. 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. |
| Transfer port |
An optional transfer port can be supplied in the side of the POD valve bonnet to be used as an auxiliary port. This port will only supply pressure when the POD valve has been actuated by control pressure applied to the actuator port and when the POD valve is fully open. NOTE: The transfer port cannot be supplied in conjunction with a transfer valve block. |
| Transfer valve block |
An optional transfer valve block can be supplied fitted to the side of the POD valve. When a DAB actuator is fitted to the valve block the transfer valve enables manifold pressure from inside the POD valve, if sufficient pressure present, to be used to open the POD valve. NOTE: The transfer valve block cannot be supplied in conjunction with a transfer port. |
| Micro-switch | An optional micro-switch can be supplied fitted to the side of the POD valve. Its function is to provide a means of electrical indication when the valve is fully open or closed. |