SAFETY SOLENOID VALVE FOR GAS
EVRM-NC / EVRM-6NC
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 passage 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, opening must be worked manually as described above. This type of device,
connected with one or more pressure switches is suitable for locking operations upon gas, air, or electric
current failure, and is qualified for continuous service (permanently live).
1- INSTALLATION (Qualified technicians only)
Shut off the gas supply and electrical power before servicing any part of the system.
Check correspondence of flow direction with arrow printed on valve body, check correct alignment of
connecting pipes and allow enough space from the walls to allow free air circulation. Avoid overtightening
and use proper tools only. Valve may be mounted with coil in horizontal or vertical position. Coil may be
oriented 360 degrees in any direction.
Install in an area that is protected from rain and water splashes or drops.
2- ELECTRICAL CONNECTION (IEC 730-1)
Using a screwdriver remove the DIN plug (box cover) from the coil and connect power cables to the clamps
according to printed designation. When reassemble use cable gland properly.
Perform leak and functional tests after mounting.
3- OPENING FUNCTION
To open the valve remove the plastic cap, pull the knob completely up to complete resetting. Put back the
plastic cap. The 6 bar type requires pressure compensation: pull the knob for the first step, wait some
moment, and then pull the knob completely up to full resetting (from 3/4” to 6”).
4- CLEANING AND MAINTENANCE
Dust and any foreign bodies may be easily removed from the filter or the gas passage zone. After shutting
off upstream gas and electric current, the coil is removed by unscrewing the reset knob and the knurled
fastening cap. Unscrew the screws fixing the counter flange to valve body. During this operation care should
be taken not to cause damage to the seat housing.
5- TECHNICAL SPECIFICATIONS
Connections
: gas threaded ISO 7-1 from Rp3/8 to Rp2½
: flanged PN16 – ISO 7005 from DN40 to DN200
Voltage rating
: 230VAC, 110VAC, 24V AC/DC, 12V AC/DC
Voltage tolerance
: -15% / +10%
Ambient temperature
: -15°C / +60°C
Max. operating pressure
: 600 mbar or 6 bar
Closing time
: < 1 second
Protection class
(EN 60529)
: IP 65 from Rp3/8 to DN80, IP 54 from DN100 to DN200
Cable gland (EN 50262)
: PG 9 (M20x1,5 from DN100 to DN200)
Pressure inlets
: G1/4 on two sides (except brass models)
Limit switch
: by request from 3/4" to 8"
Strainer
: 600 µm (except brass models)
Gas type (EN 437)
: Air and non-aggressive gases 1, 2 and 3
(gaseous state only)
(special version for aggressive gases)
Comply with the essential requirements of the following Directives:
97/23/EC, 2006/95/CE, 2004/108/CE.
This control must be installed in compliance with the rules in force.
Elektrogas reserves the right to update or make technical changes without prior notice.
GB
