Elektrogas Solenoid valve VMR 7 flanges DN65 360 Mbar

VMR VMR OTN VMR 60 Safety solenoid valves for gas Fast opening and fast closing type DN8 … DN150 delta-elektrogas.com EE161 -0422  ELEKTROGAS – Technical Sheet EE161 - 0422 VMR VMR OTN VMR 60 Safety solenoid valves for gas Fast opening and fast closing type Contents Description ………………………………………….. 2 Features …………………………………………….. 2 Functioning and application ………………………. 3 Technical specifications …………………………… 4 Gas flow chart (pressure drop) …………………… 6 Ordering information ………………………………. 8 Special versions and optionals …………………… 9 Design, installation and servicing ........................ 10 Standards and approvals …………………………. 11 Description The VMR type valve is a fast 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. Features The valves are made of aluminum alloy die-cast (or hot-pressed brass for OTN versions), with a wide range for inlet/outlet connections from DN 8 (1/4”) up to DN 150 (6”). Sealings are made of NBR-based rubber certified for use with gas (EN 549). Suitable for use with air and non-aggressive gases included in the 1, 2 and 3 families (EN 437). Special versions suitable for aggressive gases, free of non-ferrous metals and with FPM seals. Pipe connections meet Group 2 and backpressure sealing is compliant with Class A, according to EN161 requirements. The whole range can be provided in Ex-proof execution, for use in Zones 2 and 22, according to 2014/34/EU Directive (ATEX). The valve is open only when energized: if, for any reason, power supply goes down, the valve closes immediately (intrinsic safe). Suitable for heavy-duty cycle operation and qualified for continuous service (100% ED). Equipped with flow rate adjustment (except brass models). An incorporated fine mesh filter protects the valve seat and disc as well as downstream components and prevents dirty contamination (except brass models and 6 bar). Provided with G1/8 connection to fit a proof of closure switch or a visual indicator. Provided with 1/4" pressure gauge on two sides in the inlet chamber (except brass models), to connect manometers, pressure switches, leakage detectors or other gas equipments. Flanged models are provided with gauges also in the outlet chamber. The coils are provided with terminal box or with ISO 4400 plug. Both systems are provided with suitable cable gland to avoid water and dirty contamination. All components are designed to withstand any mechanical, chemical and thermal condition occurring during typical service. Effective impregnation and surface treatments have been used to improve mechanical sturdiness, sealing and resistance to corrosion of the components. Valves are 100% tested by computerized testing machineries and are fully warranted. 2-11  ELEKTROGAS – Technical Sheet EE161 - 0422 Functioning and application The VMR 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 which forces on the disc, increasing the closing function and improving the seal. When the coil is powered the valve opens rapidly, against the strength of the spring and gas pressure. The flow may be adjusted using the regulating screw on the top (see the installation and service instructions). If the power supply is shut off, the valve rapidly closes, interrupting the gas flow. Fig.1 This kind of valve is normally installed as safety and regulating device in gas trains, for industrial applications and gas firing systems. Figure 2 shows an example of installation with other Elektrogas devices. 1 = Ball valve VSG 2 = Filter FG 3 = Pressure regulator R 4 = Tightness control LD 5 = Gas pressure switch PSG 6 = Valve position visual indicator VI 7 = Fast opening solenoid valve VMR 8 = Slow opening solenoid valve VML 9 = Tightness control pressure switch 10 = Valve position electrical indicator PCS 11 = Burner pressure gauge MG 12 = Push button valve ME Fig.2 3-11  ELEKTROGAS – Technical Sheet EE161 - 0422 Technical specifications Tab. 1 Connections Internal threaded ISO 7-1 from Rp1/4 to Rp2½ or ANSI-ASME B1.20 from 1/4”NPT to 2”½NPT Flanged ISO 7005 PN16 from DN40 to DN150 or ANSI-ASA-ASME B16.5 class 150 from 2” to 6” Voltage ratings 230 VAC 50/60 Hz 120 VAC 50/60 Hz 110 VAC 50/60 Hz 24 VAC/DC 12 VAC/DC Voltage tolerance -15% to +10% Ambient temperature -15°C to +60°C (+5°F to +140°F) Media temperature Max. operating pressure 200 mbar (3 psig) 360 mbar (5 psig) 500 mbar (7 psig) 6 bar * (90 psig) Body test pressure 1 bar (15 psig) 9 bar * (130 psig) Closing time < 1 second Opening time < 1 second Gas strainer 600 µm (0.02 in) (except brass models and 6 bar) Enclosure IP54 (NEMA 3) optional IP65 with cable (NEMA 4) Cable gland M20x1,5 for terminal box PG 9 for ISO plug Wires cross-section 2,5 mm2 max. (AWG 12) for terminal board 1,5 mm2 max. (AWG 14) for ISO plug Electrical safety Class I (EN 60335-1) Coil winding insulation Class H (200°C, 392°F) Coil thermal resistance Class F (155°C, 311°F) Materials in contact with gas Aluminium alloy, Brass, Stainless steel, Plated steel Anaerobic adhesive, Nitrile rubber (NBR), Fluoroelastomer (FPM), Polytetrafluoroethylene (PTFE) * Operating pressure lower than 200mbar (3psig) not advisable Tab. 2 Power 200 mbar 360 mbar 500 mbar 6 bar Consumption (3 psig) (5 psig) (7 psig) (90 psig) [W] 230V 120V 110V 24V 12V 230V 120V 110V 24V 12V 230V 120V 110V 24V 12V 230V 120V 110V 24V 12V 1/4” O 12 15 12 12 12 - - - - - - - - - - - - - - - OTN H 12 15 12 12 12 - - - - - - - - - - - -…