Elektrogas NC solenoid valve for air control fast/slow opening fast/slow closing

[{"filename":"VRA-VLA-VTA_en.pdf","text":"VRA\n VLA\n VTA\n\n Solenoid valves for\n combustion Air regulation\n DN10 … DN80\n\n\n\n\ndelta-elektrogas.com EE164 -0124\n\f ELEKTROGAS – Technical Sheet EE164 - 0124\n\n\n\n\nVRA\nVLA\nVTA\nSolenoid valves for\ncombustion Air regulation\n\nContents\n Description ………………………………………….. 2\n Features …………………………………………….. 2\n Functioning and application ………………………. 3\n Technical specifications …………………………… 4\n Air 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\nDescription The VRA/VLA/VTA types are normally closed solenoid valves for cold combustion air regulation\n (open when energized). This type of device is suitable for high/low control of combustion air in\n industrial gas burners.\n\n\n\n\nFeatures The valves are made of aluminum alloy die-cast, with a wide range for inlet/outlet connections\n from DN 10 (3/8”) up to DN 80 (3”).\n Pipe connections meet group 2, according to EN161 requirements.\n Suitable for use with cold combustion air (not for safety shut-off).\n Provided with two flow adjustments: minimum and maximum flow rate, for high/low operation.\n Suitable for heavy-duty cycle operation and for continuous service (100% ED).\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 The valve is supplied without an internal filter, because in many applications the air is very dirty\n and it should clog the filter in short time. It is provided with a special dust cover able to protect\n mechanical moving parts.\n Provided with 1/4” pressure gauge on two sides in the inlet chamber, to connect manometers,\n pressure switches or other equipment. Models from 2”½-DN65 and above are provided with\n pressure test points also in the outlet chamber. Models 1”¼-1”½-2” can be provided on request.\n The coils are provided with terminal box or with ISO 4400 plug (optional).\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 EE164 - 0124\n\n\nFunctioning and\napplication The VRA type valve is a fast opening/closing solenoid valve. The VLA type is a slow opening and\n fast closing solenoid valve. The VTA type is a slow opening/closing solenoid valve.\n Both Min./Max. can be set from 0 to100%.\n When not energized the spring works on the disc keeping the minimum passage of air. When\n powering the coil the valve opens, moving the disc to the maximum open position. When power\n is switched off the valve moves to the minimum position.\n\n\n\n\n Min. Flow Max. Flow\n\n\n Fig.1\n\n\n Figure 2 shows an example of installation.\n\n\n\n\n1 = Ball valve\n2 = Filter\n3 = Fast opening solenoid valve for gas\n4 = Slow opening solenoid valve for gas\n5 = Air/gas ratio regulator\n6 = Stainless steel bellow\n7 = Burner\n8 = Adjusting cock\n9 = Slow opening solenoid valve for air\n\n\n\n\n Fig.2\n\n\n\n\n 3-10\n\f ELEKTROGAS – Technical Sheet EE164 - 0124\n\n\nTechnical\nspecifications Tab. 1\n Connections Gas threaded EN 10226-1 from Rp3/8 to Rp2½ or\n ANSI-ASME B1.20 from 3/8”NPT to 2”½NPT\n Flanged PN16 – ISO 7005 from DN40 to DN80 or\n ANSI-ASA-ASME B16.5 class 150 from 2” to 3”\n\n Voltage rating 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\n Voltage tolerance -15% / +10%\n\n Ambient temperature -15°C to +60°C (+5°F to +140°F)\n Media temperature\n\n Max. operating pressure 200 mbar (3 psig)\n\n Max test pressure 1 bar (15 psig)\n\n Operating time VRA: 1s opening/closing\n VLA: ~4s opening / 1s closing\n VTA: ~4s opening/closing\n\n Gas strainer None\n\n Enclosure IP54 (NEMA 3)\n optional IP65 with cable (NEMA 4)\n\n Cable gland M20x1,5 for terminal box\n PG 9 for ISO plug\n\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\n Coil winding insulation Class H (200°C, 392°F)\n\n Coil thermal resistance Class F (155°C, 311°F)\n\n\n\n\n Tab. 2\n Power 200 mbar\n Consumption (3 psig)\n [W] 230V 120V 110V 24V 12V\n O 20 20 20 20 20\n 3/8”-1/2”\n H 20 20 20 20 20\n O 25 30 30 30 30\n 3/4”-1”\n H 25 30 30 30 30\n O 180 180 180 65 65\n 1”¼-1”½-2”\n H 45 45 45 65 65\n O 180 180 180 - -\n 2”½-3”\n H 45 45 45 - -\n O – opening power consumption\n H – holding power consumption\n\n\n\n\n 4-10\n\f ELEKTROGAS – Technical Sheet EE164 - 0124\n\n\n\n\n Fig.3\n\n\n Tab. 3\n Connections Overall dimensions (3) Weight (2)\n [mm]\n [in] [Kg]\n A B C D E Int h [lbs]\n Rp 3/8 88 96 145 153 54 - - 1,4 / 1,6\n 3/8”NPT 3,46 3,78 5,71 6,03 2,13 3,1 / 3,6\n Rp 1/2 88 96 145 153 54 - - 1,4 / 1,6\n 1/2”NPT 3,46 3,78 5,71 6,03 2,13 3,1 / 3,6\n Rp 3/4 88 96 145 179 54 - - 2,5 / 2,7\n 3/4”NPT 3,46 3,78 5,71 7,05 2,13 5,5 / 6,0\n Rp 1 88 96 145 179 54 - - 2,5 / 2,7\n 1”NPT 3,46 3,78 5,71 7,05 2,13 5,5 / 6,0\n Rp 11/4 120 153 191 235 70 - - 5,7 / 6,2\n 1”¼NPT 4,72 6,02 7,52 9,25 2,76 12,6 / 13,7\n Rp 11/2 120 153 191 235 70 - - 5,7 / 6,2\n 1”½NPT 4,72 6,02 7,52 9,25 2,76 12,6 / 13,7\n Rp 2 106 156 195 245 70 - - 6,0 / 6,5\n 2”NPT 4,17 6,14 7,68 9,65 2,76 13,2 / 14,3\n Rp 2½ 180 218 254 315 70 - - 11,6 / 12,1\n 2”½NPT 7,09 8,58 10,00 12,40 2,76 25,6 / 26,7\n DN 40 165 196 195 271 70 110 4x18 7,4 / 7,9\n - - - - - - - -\n DN 50 165 196 195 271 70 125 4x18 7,4 / 7,9\n 2\"ANSI (1) 6,50 7,72 7,68 10,94 2,76 4,75 4x¾ 16,3 / 17,4\n DN 65 200 305 266 355 70 145 4x18 14,0 / 14,5\n 2\"½ANSI 7,87 12,01 10,47 13,98 2,76 5,50 4x¾ 30,9 / 32,0\n DN 80 200 305 266 355 70 160 8x18 14,0 / 14,5\n 3\"ANSI 7,87 12,01 10,47 13,98 2,76 6,00 4x¾ 30,9 / 32,0\n1\n( ) Optional Kit (2) VRA / VLA (3) VTA type: E+10 mm\n\n\n\n\n 5-10\n\f ELEKTROGAS – Technical Sheet EE164 - 0124\n\n\n\n\nAir flow chart\n(Pressure drop)\n\n\n\n dP inch\n\n 0.04\n 0.05\n 0.1 0.2 0.3 0.4\n 0.5\n 1.0\n 0.06\n 20 40\n…