Related Manuals for Elektrogas EVRM-NA
Summary of Contents for Elektrogas EVRM-NA
- Page 1 EVRM-NA EVRM-6NA Safety solenoid valves for gas Manual reset - Normally open DN10 … DN200 elektrogas.com EE167 -0510...
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Page 2: Table Of Contents
Installation and servicing ………………………….. 10 Description The EVRM-NA /6NA type valve is a manual reset safety valve that is normally open. 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... -
Page 3: Functioning And Application
Functioning and application The EVRM-NA /6NA type valve is a manual reset safety valve that is normally open. A manual operation is therefore necessary to open the valve and to reset the mechanism consenting to maintain this state. The powering by means of line current and/or condenser discharge, induced by the leakage detector, safety thermostat or alarm system causes driving of the mechanism and consequent closing of the gas orifice. -
Page 4: Special Versions And Optionals
ELEKTROGAS – TECHNICAL MANUAL Special versions and optionals The sizes 1”¼, 1”½ and 2” can be provided with G1/4 gauges also in the outlet chamber. A closed position indicator micro-switch (CPI) can be installed. Models from DN65 to DN200 are provided with G1/8 connection on the bottom for these facilities -on request from 3/4"... - Page 5 ELEKTROGAS – TECHNICAL MANUAL Fig.3 Tab. 2 Material and Power Flow factor Overall dimensions Weight Connections Consump. @230VAC [mm] [m³/h] [Kg] CuZn AlSi Rp 3/8 Rp 1/2 G 3/4 Rp 3/8 Rp 1/2 Rp 3/4 Rp 1 12,0 Rp 11/4...
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Page 6: Gas Flow Chart (Pressure Drop)
ELEKTROGAS – TECHNICAL MANUAL Gas flow chart (Pressure drop) Fig. 4 Formula of conversion from air to other gases Tab. 3 Gas type Specific gravity ρ ρ ⋅ [Kg/m³] 1,25 1,00 Natural gas 0,80 1,25 Town gas 0,57 1,48 2,08 0,77 15°... - Page 7 ELEKTROGAS – TECHNICAL MANUAL When the flow read on the diagram is referred to operating pressure instead of standard conditions, the pressure drop ∆p read on the diagram must be multiplied for the factor: (1+ relative pressure in bar) Example: In the 2”...
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Page 8: Ordering Information
ELEKTROGAS – TECHNICAL MANUAL Ordering information Tab.4 Additional code for special voltages Designation (230VAC) Connections 110 VAC 24 V AC/DC ( 24 VDC-22W 12 VDC-12W ( 12 VDC-22W 600 mbar 6 bar EVRMNA0O EVRM6NA0O Rp 3/8 brass EVRMNA1O EVRM6NA1O Rp 1/2 brass... -
Page 9: Standards And Approvals
ELEKTROGAS – TECHNICAL MANUAL Standards and approvals The valve design meets current European approval requirements regarding safety shut-off functions on gaseous fuels. These products conform with the Pressure Equipment Directive (97/23/EC) and the certification has been issued by the notified body: C.S.I. -
Page 10: Installation And Servicing
ELEKTROGAS – TECHNICAL MANUAL Installation and servicing To assure a proper and safe operation, as well as a long life of the valve, the installation procedure and a periodical servicing are very important topics and the following instructions should be always fulfilled. - Page 11 ELEKTROGAS – TECHNICAL MANUAL ELECTRICAL CONNECTION (IEC 730-1) Valve is provided with an ISO 4400 plug for the electrical connections. To connect the valve do the following: Using a screwdriver remove the plug from the coil. Unscrew the gland-nut (7) and remove the washer (6) and grommet (5).
- Page 12 ELEKTROGAS – TECHNICAL MANUAL INTERNAL INSPECTION If the valve does not work properly, do not dismount the resetting mechanism, but replace it with a new one. THREADED MODELS Shut ball valve upstream the system and make sure no pressure is inside the valve.
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