The RS type is a regulator for gas pipelines 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 to protect them against excess of pressure.
Regulators for gas with filter and safety shut-off DN20-DN50
In 1961 Elettromeccanica DELTA s.p.a. was founded in Arcade (TV) with the aim of designing and manufacturing oil burners with mechanical atomization. Today, Elettromeccanica DELTA and its brand Deltapumps and Elektrogas are leading manufacturers of gear oil pumps and safety control valves, exported in more than 60 countries in the world.
The RS type is a regulator for gas pipelines 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 to protect them against excess of pressure.
Regulators for gas with filter and safety shut-off DN20-DN50
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.
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 are equipped with a filter element
with a very high holding capacity of dust and impurities (filtration grade<30µm). Filter structure
consists in a steel support frame covered with a double-layer high-performance nonwoven made
of polyolefine fibers. Thanks to that, moving parts of regulator and other devices downstream are
fully protected.
The regulators are equipped with 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 of inlet pressure
does not cause any variation of outlet pressure.
The impulse line is integrated inside the regulator. Special versions with external impulse line are
available on request.
Pipe connections meet group 2.
R – RF regulators have been designed to generate low pressure drop 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 equipments.
All components are designed to withstand any mechanical, chemical and thermal condition
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.
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 500mbar (50 KPa) or Pout+30mbar
Pressure 8-16 13-26 20-40 30-60 50-100 80-160 130-260
(mbar)
Spring color 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)
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)
