EVRM-NA -6NA Safety solenoid valves for gas manual reset - Normally Open
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EVRM-NA EVRM-6NA Safety solenoid valves for gas Manual reset - Normally open DN10 … DN200

ELEKTROGAS – TECHNICAL MANUAL EVRM-NA EVRM-6NA Safety solenoid valves for gas Manual reset - Normally open 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 and servicing ………………………….. 10 The EVRM-NA /6NA type valve is a manual reset safety valve that is normally open. The closing function is electrically activated. This...

ELEKTROGAS – TECHNICAL MANUAL 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. If energizing of the sensor persists because of the presence of gas, the valve remains under power and does not allow reset. When the causes for locking...

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" to 2" - (not available for 6 bar versions and brass models). To install the micro-switch the adapting kit must be required. The threaded models Rp11/2 and Rp2 can be provided with flanged connections using an optional kit. Whole range can be provided with Ex-proof...

ELEKTROGAS – TECHNICAL MANUAL Tab. 2 Material and Connections CuZn Rp 3/8 Rp 1/2 G 3/4 G1 Overall dimensions ( ) Valve open

ELEKTROGAS – TECHNICAL MANUAL Gas flow chart (Pressure drop) Formula of conversion from air to other gases Specific gravity ρ [Kg/m³] Air Natural gas Town gas LPG

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: 3 In the 2” solenoid valve with an air flow of 80 Nm /h there is a pressure drop ∆p = 5 mbar. 3 If we consider that 80 m /h is the flow at 200 mbar of inlet pressure, then the pressure drop to be consider is: ∆p = 5x(1+0,2) = 6 mbar Normally, pressure drop and flow rate for the valves are read from the gas flow diagram. However, the valves can also...

ELEKTROGAS – TECHNICAL MANUAL Ordering information Tab.4 Additional code for special voltages Designation (230VAC) 600 mbar Rp 3/8 brass Rp 1/2 brass G 3/4 brass G 1 brass Rp 3/8 Rp 1/2 Rp 3/4 Rp 1 Rp 1¼ Rp 1½ Rp 2 DN 40 (1) DN 50 (1) (2) DC operation with impulse only (3) Provided with different mechanical parts (not interchangeable) The versions with inlet pressure p1 ≤ 6 bar (600 kPa) may be order inserting the digit “6” in to the designation. Different voltage than 230V may be order adding to the standard designation the additional code shown above. Other optionals must be order with...

ELEKTROGAS – TECHNICAL MANUAL 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. Spa Viale Lombardia 20 I-20021 Bollate (MI) The following standards/technical specifications have been fulfilled: - Quality Management System is certified according to UNI EN ISO 9001 and the monitoring is carried out by the notified body: Kiwa Gastec Italia Spa. Via Treviso, 32/34 I- 31020 San Vendemiano (TV)

ELEKTROGAS – TECHNICAL MANUAL 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. IMPORTANT: before proceeding with the installation, ensure that all the features of your system comply with the specifications of the valve (gas type, operating pressure, flow rate, ambient temperature, electrical voltage, etc.). CAUTION Shut off the gas supply at the main manual shut-off valve and disconnect electrical power to the valve before...

ELEKTROGAS – TECHNICAL MANUAL 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). To remove the terminal block (1) from the plug housing (3), remove the gasket (2) and extract the screw (4) completely, then insert a flat screwdriver into the slot located on edge and pull it. Insert the cable in to the gland-nut, washer, grommet and then into the plug housing. Connect power cables to the board terminals according...