ElektrogasAir Solenoid valves

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

SKU 3G-OTH-02651

Also listed as: VRAVLAVTA · VRA VLA VTA · VRA-VLA-VTA

Brand

Elektrogas

Item

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

Local availability & support — Singapore

Local office: 20 Woodlands Link #09-05, Singapore 738733
Phone: +65 8878 8355
Delivery: Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment: Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to: Singapore

Technical Specifications

Elektrogas

Setting

High/Low stage operation / VRA: 1s opening/closing / VLA: ~4s opening/1s closing / VTA: ~4s opening/closing / Bypass bore (optional) 

Media Temperature

Cold air 60°C max 

Operating Pressure

0 … 200 mbar 

Material/Connections

AlSi Rp3/8 … Rp2½ / AlSi DN40 … DN80 

Datasheet Content

[{"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…

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Elektrogas Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Elektrogas presents the NC solenoid valve for air control fast/slow opening fast/slow closing, an air solenoid valve offering High/Low stage operation. Available in VRA, VLA, and VTA models, the VRA provides 1-second opening and closing, the VLA approximately 4-second opening and 1-second closing, and the VTA approximately 4-second opening and closing, with an optional bypass bore. This valve handles cold air media up to 60°C, operates at 0 to 200 mbar pressure, and features AlSi connections in Rp3/8 to Rp2½ or DN40 to DN80 sizes.

Frequently Asked Questions

What is the Elektrogas VRA VLA VTA air solenoid valve used for?

The Elektrogas VRA, VLA, and VTA are normally closed solenoid valves for regulating cold combustion air in industrial gas burners. They enable high/low stage control, adjusting airflow between minimum and maximum positions for efficient burner operation. These valves are suitable for continuous service (100% ED) and heavy-duty cycles.

What are the specifications of the Elektrogas VRA VLA VTA valve?

The Elektrogas VRA/VLA/VTA valves handle cold air up to 60°C max, with operating pressure from 0 to 200 mbar. Connections range from Rp3/8 to Rp2½ (AlSi) or DN40 to DN80. VRA offers ~1s opening/closing, VLA ~4s opening/1s closing, and VTA ~4s opening/closing. An optional bypass bore is available.

Where to buy Elektrogas VRA VLA VTA valves in Singapore?

3G Electric supplies Elektrogas VRA, VLA, and VTA air solenoid valves to Singapore. We handle logistics, customs clearance, and delivery for your order. Contact us for pricing and lead time on these valves. We source and deliver genuine Elektrogas components for industrial burner applications.

How to install and maintain the Elektrogas VRA VLA VTA valve?

Install the Elektrogas valve with the flow direction arrow aligned correctly. Ensure the air is filtered upstream to protect moving parts, as the valve is supplied without an internal filter. For maintenance, periodically check the dust cover and pressure gauge connections. Refer to the manufacturer's datasheet for specific torque and wiring details.

Used in

Common applications for Elektrogas

Industrial steam and hot-water boiler gas trains — VMR slow-opening solenoid valves on modulating burners

Commercial kitchen and bakery gas-fired ovens — VML magnetic valves for appliance-level safety shut-off

Process-industry gas supply skids — VMH high-pressure variants rated to 6 bar for elevated-pressure networks

Burner OEM gas-train assemblies — multibloc combined-function units reducing commissioning and leak paths

Retrofit drop-in replacements for existing Elektrogas VMR valves on installed burner racks

Elektrogas Products

3G Electric supplies Elektrogas air solenoid valves. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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