Directly controlled proportional controller with diaphragm actuator
The ARI-PREDEX overflow regulator type Fig 705 is a directly controlled proportional regulator without auxiliary energy for regulating a set inlet pressure. It opens automatically when the inlet pressure exceeds the setpoint and closes when it falls below it.
Thanks to the diaphragm actuator with rolling diaphragm and stainless steel bellows, the regulator works independently of the outlet pressure. It is suitable for fluids of group II according to the Pressure Equipment Directive 2014/68/EU, such as water vapor, neutral gases and liquids.
| Characteristic | Value |
| Nominal size | DN 15 – DN 150 |
| Nominal pressure | PN 16, PN 25, PN 40 |
| Setpoint ranges | 0.2-16 bar (depending on spring and actuator) |
| Temperature range | -60 °C to +350 °C (depending on material) |
| materials | Body: Cast iron, ductile iron, cast steel, stainless steel |
| Gaskets | Metal sealing or PTFE soft seal |
| Leakage class | Class I according to DIN EN 1349 / 60534-4 |
Water vapor, neutral gases and liquids.
Up to 350 °C (depending on the material).
0.2-16 bar (depending on spring and actuator).
Pressure Equipment Directive 2014/68/EU, DIN EN 1092, DIN EN 558.
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