Datasheet Content
EVRM-NA6
EVRM-NA8
EVRM-NA6 / EVRM-NA8
Printed in Italy - EE401/0900
S O L E N O I D V A L V E S
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Solenoid safety valves for gas
Manual reset - Normally open
The EVRM-NA type valve is a manual reset safety valve
that is normally open. This type of device, connected
with one or more gas leakage detectors or alarm signals
for the presence of carbon monoxide, is suitable for
performing locking operations on the gas line.
The EVRM-NA type valves are made in accordance with
EN161 standard (when applicable). All models are
conforming with the European Directives 89/336 EEC
and 73/23 EEC.
Features
Large range for inlet/outlet connections, from 3/8” to
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6” pipes sizing.
Provided with G1/4” pressure gauge on two sides in
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the inlet pressure chamber (except brass models).
Others gauge points on request.
Optional G1/8” connection for closed position
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indicator micro switch (on request from 3/4" to 6").
Fine mesh filter incorporated to prevent dirty
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contamination of the seal seat (except brass
models). EVRM-NA8
Maximum operating pressure 500 mbar.
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Suitable for air and non-aggressive gases (1, 2 and Technical specifications
3 families).
Connections ……………….. f/f Gas threaded ISO 228/1
Coil insulation is class H (180° C).
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from Rp 3/8" to Rp 2"
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Terminals with DIN plug and PG connector. Flanged PN16 – ISO 7005
from DN65 to DN150
Valves are 100% tested by computerized testing
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machineries and are fully warranted. Voltage rating ……………...230 Vac 50/60 Hz
110 Vac 50/60 Hz
For valve identification see the following charts.
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24 Vac/dc
12 Vac/dc
Voltage tolerance …………. -15% / +10%
WARNING Power consumption ………. see charts
This control must be installed in compliance with the
Environment temperature …-15° C / +60° C
laws in force.
Read instructions before use. Max. working pressure …… 500 mbar
Flow capacity ……………… see charts
Seal ………………………… NBR
Closing time ……………….. < 1 sec.
Protection class …………… IP 54
Cable gland …………………PG09
Overall dimensions ……….. see charts
Printed in Italy - EE402/0900
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S O L E N O I D V A L V E S
Operation
The EVRM-NA type valve is a manual reset safety valve
that is normally open. A manual operation is therefore
necessary to open the valve and set the mechanism
consenting to maintain this state. The powering by
means of line current and/or condenser discharge,
induced by the leakage detector, causes tripping of the
mechanism and consequent closing of the gas passage.
If energizing of the sensor persists due to the presence
of gas, the valve remains under power and does not
allow reset. When the causes for locking have been
eliminated, valve must be opened manually.
Accessories
A fine mesh filter is provided, to prevent dirty
contamination of the seal seat. However, an external
strainer must be installed upstream of the valve. Brass
models are available without internal filter only.
Inlet pressure area is provided with bilateral G¼"
gauges, to connect min/max adjustable pressure
switches, leakage tester or other gas equipments. On
request are available gauges in outlet area from DN32
model to DN50. These are standard from DN65 to
DN150. Brass models are available without gauges only.
On request, valves are supplied with a G1/8” connection EVRM-NA3
on the bottom, to installed a closed position indicator
micro switch (from 3/4" to 6"). An adapting rod is General information
provided too.
Avoid overtightening and mount tension free.
All components are design to withstand any mechanical,
chemical and thermal condition occurring during typical
Coil features service.
Coil and DIN plug are provided with suitable gaskets, to An effective impregnation/heat treatment has been used
avoid water and dirty contamination (see the Service to improve mechanical sturdiness, sealing and
Instruction Section).
resistance to corrosion of the components.
Valves are suitable for use with air and non-aggressive
gases included in the 1, 2 and 3 families (EN 437).
For special applications ask the Corrosion Chart
showing the compatibility of materials with fluids.
Materials used: Aluminium
Brass
Cast iron
Stainless steel
Nitrile rubber (NBR)
Ethylene propylene (EPDM)
Viton™
PTFE (Teflon™)
Note: the chart is for general recommendation only.
Printed in Italy - EE403/0900
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