Datasheet Content
EVRM-NC
EVRM-6NC
Safety solenoid valves for gas
Manual reset - Normally closed
DN10 … DN300
elektrogas.com EE166 -0613
ELEKTROGAS – TECHNICAL MANUAL
EVRM-NC
EVRM-6NC
Safety solenoid valves for gas
Manual reset - Normally closed
Contents
Description ………………………………………….. 2
Features …………………………………………….. 2
Functioning and application ………………………. 3
Technical specifications …………………………… 4
Gas flow chart (pressure drop) …………………… 6
Ordering information ………………………………. 8
Special versions and optionals …………………… 8
Design, installation and servicing ........................ 9
Standards and approvals …………………………. 10
Description The EVRM-NC /6NC type valve is a manual reset safety valve that is normally closed (open
when energized). This type of device, connected to one or more gas leakage detectors, safety
thermostat or alarm signals for the presence of carbon monoxide, is suitable to perform locking
operations on the gas line.
Features The valves are made of aluminum alloy die-cast (or hot-pressed brass for OT versions), with a
wide range for inlet/outlet connections from DN10 up to DN 300.
Pipe connections meet group 2, according to EN161 requirements.
Suitable for use with air and non-aggressive gases included in the 1, 2 and 3 families (EN 437).
Special versions for aggressive gases (Biogas).
The whole range can be provided in Ex-proof execution, for use in Zones 2 and 22, according to
94/9/EC Directive (ATEX).
Two range of operating pressure: low pressure (0…600 mbar) and medium pressure (0…6 bar).
The valve is open only when energized: if, for any reason, power supply goes down, the valve
closes immediately (intrinsic safe).
An incorporated fine mesh filter protects the valve seat and disc as well as downstream
components and prevents dirty contamination (except brass models).
Provided with G1/4 pressure gauge on two sides in the inlet chamber (except brass models), to
connect manometers, pressure switches, leakage tester or other gas equipments. Flanged
models are provided with gauges also in the outlet chamber.
The coils are provided with ISO 4400 plug or with terminal box for DN100 or bigger. Both
systems are provided with suitable cable gland to avoid water and dirty contamination.
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.
Valves are 100% tested by computerized testing machineries and are fully warranted.
WARNING
This control must be installed in compliance with the rules in force.
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ELEKTROGAS – TECHNICAL MANUAL
Functioning and
application The EVRM-NC type valve is a manual reset safety valve that is normally closed. When not in
working position the spring works on the shutter keeping the gas orifice closed. Simply by
energizing the coil the valve does not open. It is necessary to manually move the reset rod
located at the top of the coil. Once opened, the valve can maintain this position until electric
current circulates on the coil. In absence of electric current the valve closes rapidly and remains
shut upon return of same. Once the causes for the lock have been eliminated, valve must be
opened manually as described above.
Fig.1
The models from DN125 or bigger and the 6 bar versions are provided with a dual-shutter
system for pressure compensation. To open the valve pull the knob for the first step, wait for
pressure compensation, and then pull the knob completely up to full resetting.
This kind of device is normally installed downstream a manual shut-off valve and upstream of
the gas regulating train. Figure 2 shows a example of installation.
Gas
detector
Gas Solenoid valve Consumer
network manual reset
Fig.2
WARNING
Location and mode of installation must be in compliance with local rules in force.
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ELEKTROGAS – TECHNICAL MANUAL
Technical
specifications Tab. 1
Connections Gas threaded ISO 7-1 from Rp3/8 to Rp2½
Flanged PN16 – ISO 7005 from DN40 to DN300
Voltage rating 230 VAC 50/60 Hz
110 VAC 50/60 Hz
24 VAC/DC
12 VAC/DC
Voltage tolerance -15% / +10%
Power consumption see charts
Ambient temperature -15°C / +60°C
Max. operating pressure 600 mbar (60 kPa)
6 bar (600 kPa)
Flow capacity see charts
Closing time < 1 second
Filter (except brass models) 600 µm, metal mesh
Protection class IP65 models with DIN plug DN10..DN80
(EN 60529) IP54 models with terminal box DN100..DN300
(IP65 optional)
Cable gland PG 9 models with DIN plug DN10..DN80
M20 models with terminal box DN100..DN300
Coil winding insulation Class H (200°C)
Coil thermal resistance Class F (155°C)
Materials in contact with gas Aluminium alloy
Brass
Stainless steel
Plated steel
Anaerobic adhesive
Nitrile rubber (NBR)
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ELEKTROGAS – TECHNICAL MANUAL
Fig.3
Tab. 2
Material and Power Flow factor Overall dimensions Weight
connections consumption Kvs
@230VAC [m³/h] [mm]
CuZn AlSi [W] A B C D Int h [Kg]
Rp 3/8 8 0,7 30 58 115 130 - - 0,4
Rp 1/2 8 1,3 30 58 115 130 - - 0,4
G 3/4 8 2,0 35 55 113 130 - - 0,6
G1 8 4,5 40 62 115 137 - - 0,7
Rp 3/8 12 2,9 70 77 148 164 - - 0,9
Rp 1/2 12 4,8 70 77 148 164 - - 0,9
Rp 3/4 12 9,5 85 96 158 180 - - 1,1
Rp 1 12 12 85 96 158 180 - - 1,1
Rp 11/4 12 20 120 153 188 220 - - 2
Rp 11/2 12 26 120 153 188 220 - - 2
Rp 2 12 40 106 156 192 230 - - 2,3
1
DN 40 ( ) 12 26 150 193 188 262 110 4x18 3,7
1
DN 50 ( ) 12 40 165 196 192 274 125 4x18 4,3
2 2
Rp 21/2 25 63 175 218 249 ( ) 297 ( ) - - 5,5
2 2
DN 65 25 63 200 305 262 ( ) 352 ( ) 145 4x18 7,6
2 2
DN 80 25 80 200 305 262 ( ) 352 ( ) 160 8x18 7,6
2 2
DN 100 45 148 252 350 305 ( ) 435 ( ) 180 8x18 17
2 2
DN 125 45 250 310 460 370 ( ) 540 ( ) 210 8x18 29
2 2
DN 150 45 315 310 460 370 ( ) 540 ( ) 240 8x23 31
2 2
DN 200 45 516 370 546 425 ( ) 635 ( ) 295 12x23 46
2 2
DN 250 45 660 405 600 485 ( ) 712 ( ) 355 12x28 72
2 2
DN 300 45 1120 460 700 523 ( ) 786 ( ) 410 12x28 99
1 2
( ) Optional Kit ( ) Valve open…
