RMA Products Profile
Where Accuracy Meets Innovation in Pipeline Metering
RMA Control
Gas Control
With this type of control, solenoid valves lead the pipeline pressure directly into the cylinder, thereby opening or closing the unit. The amount of gas needed for regulation purposes is reduced considerably since gas or oil reservoirs are not employed.
Furthermore, the actuators are more compact and weigh less than conventional gas over oil systems. niwatec‘s DG direct gas control can be equipped with a handwheel or with a hydraulic cylinder with hand pump, both working independently from the control.The modular structure facilitates maintenance and the integration of security-relevant components, such as linebreak control systems, high-, low- or differential pressure pilots and ESD valves.
Standard Features
- Operational pressure upto 200 bar
- For double or single acting actuators (with spring reset)
- Electric explosion protection in accordance with Ex-e, Ex-d or Ex-ia
- CE and ATEX 94/9/EG certified
- Control voltage: 24 V DC, 48 V DC, 110 V DC, 220 VDC, 115 V AC, or 230 VAC
- Temperature range: -29 °C to +50 °C
- Control components mounted in stainless steel casing or by request on stainless steel panel
- Tubing and fittings made of stainless steel, manufacturer of fittings according to customer‘s specification
- Position feedback open or closed
Optional Features
- Manual emergency operation by means of hand wheel or hydraulic hand pump
- Extended temperature range: -60 °C to +60 °C
- Low or high pilots for pipeline protection
- Coils with low power consumption (approx. 3 W per valve)
- Linebreak system (electric or mechanic)
- Differential pressure switch (electric or mechanic)
- ESD, Partial Stroke or SAV function
- Profibus, modbus or foundation fieldbus interface board
- Redundant solenoid valves
- SIL 2 / SIL 3
- Low regulating times (down to < 1 second) for single acting actuators
- Pressure reservoir for emergency strokes corresponding to PED 97/23/EG, GOST or ASME VII Div. 1 (approval according to country of destination). Number of emergency strokes according to customer‘s specification
- Pressure switch for signalisation of minimum pressure needed
- Local / remote switch (maintenance switch)
- Control cabinet heating incl. thermostat
- Cathodic separation
- Fire protection
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