VMM Multiple safety solenoid valve for gas regulating trains
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VMM Multiple safety solenoid valve for gas regulating trains DN32 … DN50

ELEKTROGAS – Technical Sheet EE163 - 11/11 VMM Multiple safety solenoid valve for gas regulating trains 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 The VMM type valve is a combination of two solenoid valves in an only compact and versatile valve housing. This type of device is...

ELEKTROGAS – Technical Sheet EE163 - 11/11 The VMM type valve is a safety shutting device using auxiliary power supply. The first valve (A) is a fast opening safety solenoid valve. When it is de-energized, the spring pushes on the seal disc, keeping the gas passage closed. Now, the inlet chamber is under the gas line pressure, and it forces on the disc too, improving the seal. When the coil is powered the valve opens rapidly, against the strength of the spring and gas pressure. If the power supply is shut off, the valve rapidly closes, interrupting the gas flow. Equally, the second valve...

ELEKTROGAS – Technical Sheet EE163 - 11/11 Special versions and optionals The valve can be provided with G1/8 connection on the bottom for closed position indicator micro-switch (CPI). To install the micro-switch the installing kit must be required. Protection class can be increased up to IP65. The valves will be provided with a sealed terminal box and cable set. Whole range can be provided with Ex-proof marking for use in Zone 2, according to 94/9/EC Directive (ATEX). The valve can be provided with electrical connection made by standard plug ISO 4400. The threaded models Rp11/2 and Rp2 can...

ELEKTROGAS – Technical Sheet EE163 - 11/11

ELEKTROGAS – Technical Sheet EE163 - 11/11 (Pressure drop) Formula of conversion from air to other gases Specific gravity ρ [Kg/m³] Air Natural gas Town gas LPG

ELEKTROGAS – Technical Sheet EE163 - 11/11 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 60 Nm /h there is a pressure drop ∆p = 6 mbar. 3 If we consider that 60 m /h is the flow at 200 mbar of inlet pressure, then the pressure drop to be consider is: ∆p = 6x(1+0,2) = 7,2 mbar Normally, pressure drop and flow rate for the valves are read from the gas flow diagram. However, the...

ELEKTROGAS – Technical Sheet EE163 - 11/11 Ordering information Valve type Connections size 32 = Rp1¼ 1 40 = Rp1½ DN40 ( ) 1 50 = Rp2 DN50 ( ) Max. Operating pressure 2 = 200 mbar 3 = 360 mbar Supply voltage A = 230V 50/60Hz B = 110V 50/60Hz C = 24V AC/DC Second valve type F = fast S = slow By-pass valve on the Right side (seen from the inlet) 0 = none 1 = ½” (DN15) Fast 2 = ½” (DN15) Slow By-pass valve on the Left side (seen from the inlet) 0 = none 1 = ½” (DN15) Fast 2 = ½” (DN15) Slow (1) Optional kit : extension code “FL” The special version suitable for aggressive gases may be order...

ELEKTROGAS – Technical Sheet EE163 - 11/11 The valve design meets current European approval requirements regarding safety shut-off functions on gaseous fuels. These products conform with the Gas Appliances Directive (2009/142/CE) and the certification has been issued by the notified body: GASTEC CERTIFICATION B.V. Wilmersdorf, 50 NL-7323 AC Apeldoorn CE Reg.-Nr. 0063AQ1350 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...

ELEKTROGAS – Technical Sheet EE163 - 11/11 Installation, adjustment 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. 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...

ELEKTROGAS – Technical Sheet EE163 - 11/11 ELECTRICAL CONNECTION (IEC 730-1) Valve is provided with terminal box or standard plug for the electrical connections. To connect the valve do the following: Terminal box version: - Using a screwdriver remove the box cover. - Unscrew the gland-nut (7) and remove the retaining ring (9) and conical grommet (5). - Insert the cable in to the gland-nut, retaining ring, grommet and then into its housing in the box cover. - Connect power cables to the rectifier terminals (1) according to printed designation. - Pull the cable and screw back the box cover,...

ELEKTROGAS – Technical Sheet EE163 - 11/11 1 = Connection flange 2 = G1/4 pressure gauge 3 = Filter 4 = Electrical connections 5 = By-pass flow adjustment 6 = Opening time adjustment (T) 7 = Fast stroke adjustment (Vstart) 8 = Flow rate adjustment (Vmax) A = First valve B = Second valve C = By-pass valve X = Inlet chamber Y = Middle chamber Z = Outlet chamber FAST STROKE ADJUSTMENT (Vstart) 1. 2. 3. Remove plastic cap. Using an hexagonal wrench, turn the outer screw clockwise to decrease or counterclockwise to increase the initial fast stroke. When adjustment is completed, screw back the...