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Summary of Contents for Elektrogas VMM
- Page 1 Multiple safety solenoid valve for Gas regulating trains DN32 … DN50 www.elektrogas.com VMM402AS30 Certified Quality System Printed in Italy - EE163/0704...
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Page 2: Technical Specifications
Multiple safety solenoid valve for gas regulating trains Class A - Group 2 The VMM type valve is a combination of two solenoid valves in an only compact and versatile valve housing. This device is suitable for air or gas blocking and... -
Page 3: Operation
3- Operation The VMM type valve is a safety shutting device using auxiliary power supply. The first valve (A) is a fast opening solenoid valve that is safety. 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. -
Page 4: Valve Identification
1 = ½” (DN15) Fast 3 = 1” (DN25) Fast 2 = ½” (DN15) Slow 4 = 1” (DN25) Slow ) Optional kit Fig. 3 Model Overall dimensions (mm) Weight (Kg) VMM….F00 13,0 VMM….S00 13,7 Gas threaded VMM….S10 15,3 according to VMM….S20 15,5 ISO 7/1 VMM….S30... -
Page 5: Loss Of Pressure
8- Loss of pressure mmH O 2" 1"½ 1"¼ mbar Formula of conversion from air to other gases Gas type Specific gravity (Kg/m³) Natural Gas 0.80 1.25 Town Gas 0.57 1.48 2.08 0.77 1.25 1.00 +15°C, 1013 mbar, dry Printed in Italy - EE163/0704... -
Page 6: Valve Installation
9- Valve installation 10- Electrical connections (IEC 730-1) Verify the line pressure is lower of the maximum working Check correspondence between valve voltage rating and pressure admitted to the valve. line power supply, before making any electrical connections. Check correspondence of flow direction with arrow printed on valve body. -
Page 7: Flow Rate Adjustment
Fig. 6 1 = Connection flange 2 = G1/4" pressure gauge 3 = Filter 4 = Electrical connections 5 = By-pass flow adjustment 6 = Opening time adjustment (T) 7 = Rapid stroke adjustment (Vstart) 8 = Flow adjustment (Vmax) A = First valve B = Second valve C = By-pass valve... - Page 8 13- Maintenance To maintain a good performance of the system, almost once a year, an inspection of the valve is recommended. External inspection Brake Turn off all power before servicing any part of the system. Check the conditions of the terminal board gasket. If gasket is deteriorated, replace it with a new one.
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