Description
DN100 PN16 Gas Safety Shut-Off Valve Manual Reset Elektrogas EVRM-NC9
The Elektrogas EVRM-NC9 is a DN100 (4") PN16 flanged, 2/2 way normally closed manual-reset gas safety shut-off solenoid valve designed for automatic isolation of natural gas, LPG, air and compatible non-aggressive gases.
Designed for gas detection systems, burner installations, boilers, gas trains and other gas-consuming equipment, the EVRM-NC9 provides fail-safe gas isolation when connected to gas leakage detectors, safety thermostats, carbon monoxide alarms or other safety control systems.
Unlike an automatic-reset solenoid valve, energising the EVRM-NC9 coil does not automatically reopen the gas supply. Once the safety circuit has been restored, the valve must be deliberately reopened using the manual reset control.
Key Features
✓ EN161 gas safety shut-off valve
✓ DN100 (4") PN16 flanged connection
✓ 2/2 way normally closed
✓ Manual reset safety operation
✓ Fail-safe closed on power loss
✓ Requires manual reopening after shutdown
✓ Maximum operating pressure 600 mbar
✓ Optional 6 bar EVRM-6NC version
✓ Kvs flow factor 148 m³/h
✓ Closing time under 1 second
✓ Integrated 600μm filter
✓ G1/4 pressure monitoring ports
✓ G1/8 connection for optional PCS9 closed-position switch
✓ Continuous duty 100% ED
Technical Specification
Model: Elektrogas EVRM-NC9
Function: 2/2 way normally closed with manual reset
Operation: Manual reset, direct acting gas safety shut-off valve
Connection: DN100 (4") PN16 flange
Maximum pressure: 0.6 bar / 600 mbar
High-pressure option: EVRM-6NC9, maximum 6 bar
Kvs flow factor: 148 m³/h
Closing time: <1 second
Media: Air and non-aggressive gases in gas families 1, 2 and 3 according to EN 437
Body: Aluminium alloy
Seals: NBR-based rubber certified for gas according to EN 549
Filter: Integrated 600μm metal mesh
Pressure monitoring: G1/4 pressure gauge connections
Position indication: G1/8 connection included for optional PCS9 closed-position indicator switch
Standard voltage: 230V AC 50/60Hz
Voltage options: 110V AC 50/60Hz, 24V AC/DC or 12V AC/DC
Voltage tolerance: -15% to +10%
Power consumption: 12 W
Duty: Continuous service, 100% ED
Ambient/media temperature: -20°C to +60°C
Protection: IP54
Electrical connection: Terminal box
Electrical safety: Class I according to EN 60335-1
Coil winding insulation: Class H
Coil thermal resistance: Class F
Manual Reset Fail-Safe Operation
When de-energised, an internal spring holds the valve disc closed and prevents gas flow.
Applying electrical power to the coil does not automatically open the valve. To restore gas flow, the coil must first be energised and the manual reset rod at the top of the valve operated to open the valve.
Once manually reset, the valve remains open while electrical power is maintained.
If electrical power is interrupted by a gas detector, safety thermostat, emergency control or power failure, the valve closes rapidly in under one second. When power is restored, the valve remains closed.
The cause of the shutdown must therefore be investigated and cleared before the valve is manually reset and the gas supply restored.
Gas Safety Applications
The EVRM-NC9 is suitable for safety isolation applications including:
✓ Gas leak detection systems
✓ Natural gas installations
✓ LPG installations
✓ Gas-fired burners
✓ Boilers and heating equipment
✓ Industrial gas trains
✓ Safety thermostat systems
✓ Carbon monoxide alarm systems
✓ Emergency gas shut-off systems
Pressure Gauge & Position Indication Connections
G1/4 pressure gauge connections are provided for connection of compatible:
✓ Pressure gauges
✓ Pressure switches
✓ Gas leakage testers
✓ Other gas monitoring equipment
A G1/8 connection is also provided for fitting the optional PCS9 mechanical closed-position indicator switch.
Optional Versions & Accessories
6 Bar Version: EVRM-6NC9 version available for operating pressures up to 6 bar.
PCS9 Closed Position Switch: Optional mechanical closed-position indication switch.
Normally Open Version: EVRM-NA9 manual-reset normally open version available.
Biogas Version (J): Special version available for aggressive gases such as biogas, with special construction and seals.
ATEX Version: Explosion-protected execution available for Zones 2 and 22 according to ATEX 2014/34/EU.
110V AC: Alternative supply voltage.
24V AC/DC: Alternative supply voltage.
12V AC/DC: Alternative supply voltage.
Certifications & Compliance
EN161 gas safety shut-off valve
Pressure Equipment Directive 2014/68/EU – CE Reg. No. PED/0497/895/07
ATEX 2014/34/EU when marked on the product
Electromagnetic Compatibility Directive 2014/30/EU
Low Voltage Directive 2014/35/EU
RoHS II 2011/65/EU
The current factory documentation lists these applicable directives and approvals.
Installation Notes
The valve may be installed with the coil vertically or horizontally, but must not be installed upside down.
For installation in vertical pipework, gas flow must be from bottom to top.
A gas filter should be installed upstream of the valve, and the installation location must be protected from rain, water splashes and dripping water.
Leak and functional testing should be carried out after installation. Elektrogas specifies that correct operation should be checked at least annually and recommends valve replacement after 10 years from the manufacturing date due to seal ageing.
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