VML Safety solenoid valves for gas Slow opening and fast closing type DN10 … DN80

ELEKTROGAS – Technical Sheet EE162 - 05/12 The VML type valve is a slow opening single-stage solenoid valve, normally closed (open when energized). This type of device is suitable for air or gas blocking and releasing controls, required in gas power burners, atmospheric gas boilers, industrial kilns and others gas consuming appliances. The valves are made of aluminum alloy die-cast, with a wide range for inlet/outlet connections from DN10 up to DN80. Pipe connections meet group 2 and backpressure sealing is compliant with class A, according to EN161 requirements. Suitable for use with air and...

ELEKTROGAS – Technical Sheet EE162 - 05/12 The VML type valve is a safety shutting device using auxiliary power supply. 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 slowly because of the hydraulic brake, against the strength of the spring and gas pressure. The rapid stroke may be adjusted using the regulating screw on the top (see the installation and service instructions), to adjust the initial gas flow....

ELEKTROGAS – Technical Sheet EE162 - 05/12 Technical specifications Gas threaded f/f ISO 7-1 from Rp1/2 to Rp2½ Flanged PN16 – ISO 7005 from DN40 to DN80 Voltage rating Voltage tolerance Power consumption Ambient temperature 200 mbar (20 kPa) 360 mbar (36 kPa) 500 mbar (50 kPa) Flow capacity Closing time Opening time Filter (except brass models) Protection class IP54 (EN 60529) (optional IP65 with cable) Cable gland M20x1,5 (EN 50262) for terminal box PG 9 for standard plug Wires cross-section Electrical safety Coil winding insulation Coil thermal resistance Materials in contact with gas Aluminium...

ELEKTROGAS – Technical Sheet EE162 - 05/12 Material and connections AlSi Rp 3/8 Rp 1/2 Rp 3/4 Rp 1 Rp 1¼ Rp 1½ Rp 2 Rp 2½ DN 40 1 DN 50 1 DN 65 DN 80 (1) Flanged connection optional Kit Overall dimensions

ELEKTROGAS – Technical Sheet EE162 - 05/12 Gas flow chart (Pressure drop) Formula of conversion from air to other gases Specific gravity

ELEKTROGAS – Technical Sheet EE162 - 05/12 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...

ELEKTROGAS – Technical Sheet EE162 - 05/12 Ordering information Available Tab.4 Material and connections AlSi Rp 3/8 Rp 1/2 Rp 3/4 Rp 1 Rp 1¼ Rp 1½ Rp 2 Rp 2½ DN 40 DN 50 DN 65 DN 80 (1) Flanged connections optional kit Special versions and optionals Additional G1/4 gauges in the outlet chamber: on request for the sizes 1”¼, 1”½ and 2” (standard from DN65 to DN80). G1/8 connection on the bottom to fit a closed position indicator micro-switch (PCS type): on request from 3/4" to 2" (standard from DN65 to DN80). To install the microswitch the adapting kit must be required. Protection class can be...

ELEKTROGAS – Technical Sheet EE162 - 05/12 Design, installation and servicing To assure a proper and safe operation, as well as a long service life of the valve, consider the following recommendations during the design of the system where the valve will be installed: 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.). Valve may be mounted with coil in horizontal or vertical position, not upside down. Coil may be oriented 360 degrees in any direction. In the event of vertical...

ELEKTROGAS – Technical Sheet EE162 - 05/12 The valves are designed and manufactured according to European Directive on the gas appliances 2009/142/EC and the certification has been issued by the notified Body GASTEC CERTIFICATION B.V. Wilmersdorf, 50 NL-7323 AC Apeldoorn CE Reg.-No 0063AQ1350 The following standards/technical specifications have been fulfilled: - ATEX (94/9/EC) when shown upon the product Electromagnetic Compatibility (2004/108/EC) Low Voltage Directive (2006/95/EC) RoHS II (2011/65/UE) The valves comply with the Technical Regulation 753 of Russian Federation concerning the security...