The control system of the pneumatic valves consists of a flow, level, S.G or pressure transmitter with an analogue output of 4-20mA, an analogue switch receiving the signal from the transmitter to close or open a set of N/C or N/O contacts, as well as a 4/3 directional solenoid valve activated by the analogue switch to determine the NGD valve's control position.
The NGD pneumatic valve's actuator is a natural and integrated part of the valve and is ideal for plants or pump stations where compressed air source can energise many valves.
Key advantages of Dual pneumatic control valves:
- Off-the-shelf pneumatic valves, fittings and pneumatic components enable any control and safety application
- Cost effective and reliable actuating and control system
- Low pressure actuating and control system