Delta Elektrogas RFS Gas Pressure Regulators

Gas pressure regulators with filter and safety shut-off valve

The RS type is a regulator for gas pipelines according to EN 88. It is equipped with a safety shut off valve that blocks gas flow in the event of outlet pressure being too low or too high. In the RFS type, a filter according to DIN3386 is present. This device is suitable for supplying clean gas at stable pressure to all the devices downstream and protecting them against excess pressure

Features :

  • The regulators are made of aluminum alloy die-cast and they are available with inlet/outlet connections from ¾” to 2”.

  • The regulators are equipped with adjustable springs, so outlet, maximum and minimum pressures can be set on-site in a very precise way.

  • The safety shut-off valve and regulator are independent, in this way regulating action can not hinder safety function.

  • A metallic mesh is present in RS with the scope of preventing serious damage to the moving parts due to dirt circulating in the pipeline (filtration grade <1mm). RFS is equipped with a filter element with a very high holding capacity for dust and impurities (filtration grade<30μm).

  • The filter structure consists of a steel support frame covered with a double-layer high-performance nonwoven made of polyolefine fibers. Thanks to that, moving parts of a regulator and other devices downstream are fully protected.

  • The regulators are equipped with a working and safety diaphragm, hence it is not necessary to connect outside the vent line.

  • The closing plate is balanced with compensating diaphragm so that variation in inlet pressure does not cause any variation in outlet pressure.

  • The impulse line is integrated into the regulator. Special versions with external impulse lines are available on request.

  • Pipe connections meet group 2.

  • R - RF regulators have been designed to generate low-pressure drops with high flow.

  • The governors can lock up when there is no flow.

  • Suitable for use with air and non-aggressive gases included in the 1, 2, and 3 families (EN 437).

  • Provided with G1/8 pressure test points on one side in the inlet (after the filter cartridge) and outlet chamber to connect manometers, pressure switches, or other gas equipment.

  • All components are designed to withstand any mechanical, chemical, and thermal conditions occurring during typical service.
  • Effective impregnation and surface treatments have been used to improve mechanical sturdiness, sealing, and resistance to corrosion of the components.

  • Regulators are 100% tested and fully warranted.

Specification :


Gas threaded f/f ISO 7-1 from Rp3/4 to Rp2
Flanged PN16 – ISO 7005 DN40 - DN50

Ambient temperature

-15°C ... +60°C

Inlet-Outlet pressure

RS or RFS models
Max 500mbar (50 KPa) or Pout+30mbar

Max testing pressure

Max 750 mbar (RS or RFS models)
Max 9 bar for inlet chamber and max 0.9 bar for outlet chamber (6RS or 6RFS models)

Max testing pressure M

Max 750 mbar at the inlet chamber – max 200 mbar at the air control chamber

Flow capacity

See Datasheet

Filtration grade

with metallic filter <1mm
with filtering cartridge ≤30 μm (G4 according to EN779)


Horizontal (with settable spring upward) or vertical pipeline.

Gas type

Natural gas, town gas, LPG (gaseous) of families 1,2,3 (EN437).
Special version for biogas..

Materials in contact with a gas

Aluminum alloy, Brass, Stainless steel, plated steel, Polyamide,
Anaerobic adhesive, Nitrile rubber (NBR),
Fluoroelastomer (FPM), Polytetrafluoroethylene (PTFE)

Download Datasheet: Delta Elektrogas RFS Gas Pressure Regulator

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