Elektrogas VML Series User Manual

ELEKTROGAS – TECHNICAL MANUAL
2-13
VML
Safety solenoid valves for gas
Slow opening and fast closing type
Contents
Description ………………………………………….. 2
Features …………………………………………….. 2
Functioning and application ………………………. 3
Special versions 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 VML type valve is a slow 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, with a wide range for inlet/outlet connections
from DN10 up to DN80.
Pipe connections meet group 2 and backpressure sealing is compliant with class A, according
to EN161 requirements.
Suitable for use with air and non-aggressive gases included in the 1, 2 and 3 families (EN 437).
The valve is open only when energized: if, for any reason, power supply goes down, the valve
closes immediately (intrinsic safe).
Suitable for cycle operation and qualified for continuous service (100% ED).
Equipped with flow rate adjustment.
An incorporated fine mesh filter protects the valve seat and disc as well as downstream
components and prevents dirty contamination.
Provided with G1/4 pressure gauge on two sides in the inlet chamber, 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 terminal box or with ISO 4400 plug (optional). 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.

Elektrogas VML Series Specifications

General

Brand	Elektrogas
Model	VML Series
Category	Control Unit
Language	English