Valve Manifold
Manifold valves consist of multiple needle valves and a circuit connecting those valves.
Their main applications are;
Equalizing pressure in differential pressure transmitters
Blocking one path and opening another in case of maintenance, repair, calibration and substance discharge.
Manifold valves are standard access for pressure transmitters and differential pressure transmitters.
Using a manifold valve in instrumentation will help to repair or calibrate the instruments without shutting the whole operation down. For this purpose, there are three types of manifold valves;
Two-way manifold valves
Three-way manifold valves
Five-way manifold valves
- 2WAY VALVE MANIFOLD
They are used in pressure transmitters. They usually consist of a isolate valve and a drain valve. When we use this manifold for calibration, we close isolate valve, connect drain to a pressure calibrator and then we can test the pressure.
In this case, there is no need to remove the instrument from the line or shut down the line entirely.
- 3WAY VALVE MANIFOLD
They are used in differential pressure transmitters and usually consist of two isolate valve and one equalizer valve.
To find out differential pressure transmitter’s zero trim, we open equalizer and close isolate valve. In this case, the pressure equalizes on both high pressure and low pressure sides and if differential pressure transmitter is calibrated, the device should show “zero”.
- 5WAY VALVE MANIFOLD
They are used for differential pressure transmitters. Five-way manifolds consist of two isolate, one equalizer and two vent valves.
The process of checking transmitter’s zero trim is the same as in three-way manifolds. For calibration of these transmitters, first we equalize pressure of the sides and then connect the vent valve to a pressure calibrator.
This company offers manifold valves with Brazilian brand “Smar” and Indian brand “General Instrument Consortium”.
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| VALVE MANIFOLD SMAR | Manifold Valves |
| Manifold & Needle Valves |
