Delta-Elektrogas RFS Gas Regulators according to EN 88. It is equipped with a safety shutoff valve which blocks gas flow in 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. Regulators for gas with filter and safety shut-off DN20-DN50.
2011 – Elektrogas with a product that now includes control valves, filters, gas regulators, servomotors, and combustion controllers. Elettromeccanica DELTA, with its brands Elektrogas and Delta pumps, is a proud manufacturer of safety and control products for gas firing systems and fuel oil appliances, successfully installed in more than 60 countries in the world.
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 totally 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 of 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 the regulator and other devices downstream are
fully protected.
The regulators are equipped with working and safety diaphragms, 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 have the ability to 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.
Specifications
Connections 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 500 mbar (50 KPa) or Pout+30mbar
Pressure 8-16 13-26 20-40 30-60 50-100 80-160 130-260
(mbar)
Spring colors red blue – orange green pink yellow
6RS or 6RFS models
max 6 bar (0,60 MPa) or P out + 50 mbar (6RS or 6RFS models)
Pressure 20- 40 30-60 50-100 80-160 130-260 200-400 320-640
(mbar)
Spring color – orange green pink yellow black violet
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)
The pressure of safety shut-off
Minimum pressure (mbar) 4-15 8-30 15-55 30-110
Spring color – violet black yellow
Maximum 36-65 50-90 85-150 140-250 220-400 330-600 520-950
pressure
(mbar)
Spring color – orange green pink yellow black violet
Regulating class RS or RFS models: Class A (±15% of set value)
(EN88)
6RS or 6RFS models:
AC20 (±20% of set value) for springs 20-40 and 30-60 mbar,
AC10 (±10% of set value) for other springs
SG30 for lock-up (+7.5mbar or +30% of set value, at least)
Over-pressure shut-off:
AG30 for springs 36-65, 50-90, 70-120, 95-170
AG10 for other springs
Filtration grade with metallic filter <1mm
with filtering cartridge ≤30 µm (G4 according to EN779)
Flow capacity See tab. 2
Installation 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 Aluminum alloy
with gas Brass
Stainless steel
Plated steel
Polyamide
Anaerobic adhesive
Nitrile rubber (NBR)
Fluoro elastomer (FPM)
Polytetrafluoroethylene (PTFE)
