Elektrogas NC/NO manual reset safety valve for gas fast closing

[{"filename":"EVRM-NC_en.pdf","text":"EVRM-NC\n EVRM-6NC\n\n Safety solenoid valves for gas\n Manual reset - Normally closed\n DN10 … DN300\n\n\n\n\ndelta-elektrogas.com EE166 -0124\n\f ELEKTROGAS – Technical Sheet EE166 - 0124\n\n\n\nEVRM-NC\nEVRM-6NC\nSafety solenoid valves for gas\nManual reset - Normally closed\n\n\nContents\n Description ………………………………………….. 2\n Features …………………………………………….. 2\n Functioning and application ………………………. 3\n Technical specifications …………………………… 4\n Gas flow chart (pressure drop) …………………… 6\n Ordering information ………………………………. 8\n Special versions and options …….….…….……… 8\n Design, installation and servicing ......................... 9\n Standards and approvals …………………………. 10\n\n\n\n\nDescription The EVRM-NC /6NC type valve is a manual reset safety valve that is normally closed (open when\n energized). This type of device, connected to one or more gas leakage detectors, safety\n thermostat or alarm signals for the presence of carbon monoxide, is suitable to perform locking\n operations on the gas line.\n\n\n\n\nFeatures The valves are made of aluminum alloy die-cast (or hot-pressed brass for OT versions), with a\n wide range for inlet/outlet connections from DN10 (3/8”) up to DN 300 (12”).\n Sealings are made of NBR-based rubber certified for use with gas (EN 549).\n Suitable for use with air and non-aggressive gases included in the 1, 2 and 3 families (EN 437).\n Special versions suitable for aggressive gases, free of brass and with FPM seals.\n Pipe connections meet Group 2, according to EN161 requirements.\n The whole range can be provided in Ex-proof execution, for use in Zones 2 and 22, according to\n 2014/34/EU Directive (ATEX).\n Qualified for continuous service (100% ED).\n The valve is open only when energized: if, for any reason, power supply goes down, the valve\n closes immediately (intrinsic safe).\n An incorporated fine mesh filter protects the valve seat and disc as well as downstream\n components and prevents dirty contamination (except brass models).\n A proof of closure switch or a visual indicator can be installed (see PCS-VI datasheet for details);\n in this case the valve has to be equipped with 1/8” connection on the bottom. Models from 2”½-\n DN65 and above have this features, smaller models can have it on request.\n Provided with 1/4” pressure gauge on two sides in the inlet chamber (except brass models), to\n connect manometers, pressure switches, leakage tester or other gas equipment. Models from\n 2”½ up to 12” are provided with gauges also in the outlet chamber. Models 1”¼-1”½-2” can be\n provided on request.\n The coils are provided with ISO 4400 plug or with terminal box for DN100 or bigger.\n All components are designed to withstand any mechanical, chemical and thermal condition\n occurring during typical service. Effective impregnation and surface treatments have been used\n to improve mechanical sturdiness, sealing and resistance to corrosion of the components.\n Valves are 100% tested by computerized testing machineries and are fully warranted.\n\n\n\n\n 2-10\n\f ELEKTROGAS – Technical Sheet EE166 - 0124\n\n\n\n\nFunctioning and\napplication The EVRM-NC type valve is a manual reset safety valve that is normally closed. When not in\n working position the spring works on the shutter keeping the gas orifice closed. Simply by\n energizing the coil the valve does not open. It is necessary to manually move the reset rod located\n at the top of the coil. Once opened, the valve can maintain this position until electric current\n circulates on the coil. In absence of electric current, the valve closes rapidly and remains shut\n upon return of same. Once the causes for the lock have been eliminated, valve must be opened\n manually as described above.\n\n\n\n\n Fig.1\n\n\n\n\n The models from DN125 or bigger and the 6 bar versions are provided with a dual-shutter system\n for pressure compensation. To open the valve, pull the knob for the first step, wait for pressure\n compensation, and then pull the knob completely up to full resetting.\n\n\n This kind of device is normally installed downstream a manual shut-off valve and upstream of the\n gas regulating train. Figure 2 shows an example of installation.\n\n\n\n\n Gas\n detector\n\n\n\n\n Gas Solenoid valve Consumer\n network manual reset\n\n\n\n\n Fig.2\n\n\n\n 3-10\n\f ELEKTROGAS – Technical Sheet EE166 - 0124\n\n\n\n\nTechnical\nspecifications Tab. 1\n Connections Internal threaded EN 10226-1 from Rp3/8 to Rp2½ or\n ANSI-ASME B1.20 from 3/8”NPT to 2”½NPT\n Flanged ISO 7005 PN16 from DN40 to DN300 or\n ANSI-ASA-ASME B16.5 class 150 from 2” to 10”\n Voltage ratings 230 VAC 50/60 Hz\n 120 VAC 50/60 Hz\n 110 VAC 50/60 Hz\n 24 VAC/DC\n 12 VAC/DC\n Voltage tolerance -15% to +10%\n Ambient temperature -20°C to +60°C (-4°F to +140°F)\n Media temperature\n Max. operating pressure 600 mbar (9 psig)\n 6 bar * (90 psig)\n Max test pressure 1 bar (15 psig)\n 9 bar * (130 psig)\n Closing time < 1 second\n Gas strainer 600 µm (0,02 in), metal mesh\n (except brass models)\n Enclosure IP65 models with ISO plug DN10..DN80 (NEMA 4)\n IP54 models with terminal box DN100..DN300 (NEMA 3)\n (IP65 optional with cable NEMA 4)\n Cable gland PG 9 models with ISO plug DN10..DN80\n M20 models with terminal box DN100..DN300\n Wires cross-section 2,5 mm2 max. (AWG 12) for terminal board\n 1,5 mm2 max. (AWG 14) for ISO plug\n Electrical safety Class I (EN 60335-1)\n Coil winding insulation Class H (200°C, 392°F)\n Coil thermal resistance Class F (155°C, 311°F)\n Materials in contact with gas Aluminum alloy, Brass, Stainless steel, Plated steel\n Anaerobic adhesive, Nitrile rubber (NBR), Fluoroelastomer\n (FPM), Polytetrafluoroethylene (PTFE)\n\n Tab. 2\n\n Power\n Consumption\n [W] 230V 120V 110V 24V 12V\n 3/8”-1/2” OT 8 8 8 12 12\n 3/4” OT 8 8 8 12 12\n 1” OT 8 8 8 12 12\n 3/8”-1/2” 12 12 12 12 12\n 3/4”-1” 12 12 12 12 12\n 1”¼-1”½-2” 12 12 12 12 12\n 2”½-3” 12 12 12 12 12\n 4” 35 35 35 35 35\n 5”- 6” 35 35 35 35 35\n 8” 35 35 35 35 35\n 10” 35 35 35 35 35\n 12” 35 35 35 35 35\n\n\n\n\n 4-10\n\f ELEKTROGAS – Technical Sheet EE166 - 0124\n\n\n\n\n Fig.3\n Tab. 3\n Material and Overall dimensions Weight\n connections [mm] [Kg]\n [in] [lbs]\n CuZn AlSi A B C2 D2 Int h\nRp 3/8 30 58 115 130 0,4\n 3/8\"NPT 1,18 2,,28 4,53 5,12 0,9\nRp 1/2 30 58 115 130 0,4\n 1/2\"NPT 1,18 2,28 4,53 5,12 0,9\nG 3/4 35 55 113 130…