ELEKTROGAS – MANUALE TECNICO
2-12
EVRM-NC
EVRM-6NC
Safety solenoid valves for gas
Manual reset - Normally closed
Contents
Description ………………………………………….. 2
Features …………………………………………….. 2
Functioning and application ………………………. 3
Accessories and optionals ………………………… 4
Technical specifications …………………………… 4
Gas flow chart (pressure drop) …………………… 6
Ordering information ………………………………. 8
Standards and approvals …………………………. 9
Installation and servicing ………………………….. 10
Description
The EVRM-NC /6NC type valve is a manual reset safety valve that is normally closed (open
when energized). The closing function is electrically activated. 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 200.
Suitable for use with air and non-aggressive gases included in the 1, 2 and 3 families (EN 437).
This 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).
Flanged models are provided with gauges in the outlet chamber too. Other gauge points on
request.
Provided with G1/8 connection on the bottom for closed position indicator micro switch from
DN65 to DN200 (on request from 3/4" to 2").
The coils are provided with ISO 4400 plug or with terminal box for DN100 and higher. Both
systems are provided with suitable cable gland to avoid water and dirty contamination.
Pipe connections meet group 2, according to EN161 requirements.
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.
