ELEKTROGAS – TECHNICAL MANUAL
2-13
VMR
VMR-OTN
Safety solenoid valves for gas
Fast opening and fast closing type
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, adjustment and servicing …………….. 10
Description The VMR type valve is a fast opening single-stage solenoid valve, normally closed (open when
energized). This type of device is suitable for air or gas blocking and releasing controls, required
in gas power burners, atmospheric gas boilers, industrial kilns and others gas consuming
appliances.
Features The valves are made of aluminum alloy die-cast (or hot-pressed brass for OTN versions), with a
wide range for inlet/outlet connections from DN 8 up to DN 150.
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).
Qualified for continuous service (100% ED).
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 DN150 (on request from 3/4" to 2").
The coils are provided with ISO 4400 plug or with terminal box. Both systems are provided with
suitable cable gland to avoid water and dirty contamination.
Pipe connections meet group 2 and backpressure sealing is compliant with class A, 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.
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