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DUNGS GW...A4 HP - Pressure Switches for gas, air, flue
DungsPressure switch

DUNGS GW...A4 HP - Pressure Switches for gas, air, flue

Adjustable DUNGS Pressure Switches GW…A4 HP for monitoring pressure deviations. Suitable for air, flue, exhaust gases, hydrogen and gases of gas families 1, 2 and 3 in burner, ventilation and air-conditioning systems.

SKU 3G-OTH-02968

Also listed as: GWA4HPUSCA · GW A4 HP US CA

Brand
Dungs
Item
GW...A4 HP - Pressure Switches for gas, air, flue
Category
Pressure switch
Available to Order
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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

Datasheet Content

[{"filename":"gw-a4-hp_manual_us_272812.pdf","text":"GW A4/2 HP SGS\n Gas Pressure Switch USA CDN\n Installation Instructions\n\n\n\n Table of Contents\n Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . Page 1\n Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1\n Attention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1\n Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2\n Model Description & Part Number . . . . . . . . . . Page 2\n Mounting and Pressure Connection . . . . . . . . Page 3\n Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3\n Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3\n Adjustment & Reset . . . . . . . . . . . . . . . . . . . . . . Page 4\n Installation Position . . . . . . . . . . . . . . . . . . . . . . Page 4\n Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5\n Maintenance & Testing . . . . . . . . . . . . . . . . . . . Page 5\n Accessories & Replacement . . . . . . . . . . . . . . . Page 6\n\n\n\n Approvals\n CSA Certified:\n \t\t CSA C22.2 No.14\n \t\t CSA C22.2 No.0\n \t\t UL 508\n File # 2620681\n\n\n\n\n Attention\n The installation and maintenance Check the ratings in the specifica-\n of this product must be done tions to verify that they are suit-\n under the supervision of an ex- able for your application.\n perienced and trained specialist.\n Never perform work if gas pres- [V] [A]\n sure or power is applied, or in [Hz] [VA]\n the presence of an open flame.\n\n\n\n\n MC • Karl Dungs, Inc. • GW A4/2 HP SGS • Edition 2024.04 • P/N 272812 • Rev. -0\n Please read the instruction be- On completion of work on the\n fore installing or operating. Keep Safety pressure switch, perform a leak-\n the instruction in a safe place. You\n first age and function test.\n\n\n O.K.\n find the instruction also at www.\n dungs.com. If these instructions\n are not heeded, the result may\n be personal injury or damage to\n property.\n Any adjustment and application- This product is intended for\n specific adjustment values must IFGC installations covered by, but not\n be made in accordance with CSA limited to, the following fuel gas\n the equipment manufacturers UL codes and standards: NFPA 54\n instructions. ANSI or IFGC (International Fuel Gas\n NFPA Code) or the following equipment\n codes and standards: NFPA 37,\n NFPA 85, NFPA 86, ANSI Z83.4/\n CSA 3.7, ANSI Z83.18/CSA 4.9,\n Explanation of symbols ANSI Z21.13, CSD-1.\n\n 1, 2, 3 ... = Action\n • = Instruction\n1…6\n\f Specification\n GW...HP SGS High/Low ventless gas pressure switch (SPDT). Pressure acts via the diaphragm against the force of the\n setting spring on the microswitch. The pressure switch operates without any auxiliary power.\n\n Max. Operating Pressure (MOP) Ambient / Medium Temperature\n GW 500\t\t 2* bar (30 PSI) °F Ambient: +5 °F ... +158 °F\n +153\n GW 500\t\t 5* bar (75 PSI) (-15 °C ... +70 °C)\n GW 2000\t\t 5 bar (75 PSI) Medium: +5 °F ... +158 °F\n 0\n GW 6000\t\t 8 bar (120 PSI) (-15 °C ... +70 °C)\n -40\n [PSI] 2* bar @ setting 0.1 - 0.15 bar Storage: -22 °F ... +185 °F\n 5* bar @ setting 0.15 - 5 bar (-30 °C ... +85 °C)\n * to stay within the switch setting toler- Gases\n ance over the useful life of the switch. Dry, natural gas, propane, butane;\n other noncorrosive gases.\n Gas\n Suitable for biogases up to 1.0 % by\n volume, wet H2S at + 35 °C (subject\n to gas analysis of the installation) and\n Electrical Connection flue gases of biogas installations up to\n Screw terminals via M 20 x 1.5 0.1 % by volume, wet SO2 at + 35 °C.\n conduit connection\n Proven suitability for barn atmos-\n [V] [A] phere in accordance with DIN EN\n [Hz] [VA]…

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Dungs Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

Adjustable DUNGS Pressure Switches GW…A4 HP for monitoring pressure deviations. Suitable for air, flue, exhaust gases, hydrogen and gases of gas families 1, 2 and 3 in burner, ventilation and air-conditioning systems.

Frequently Asked Questions

What is the DUNGS GW...A4 HP pressure switch used for?

The DUNGS GW...A4 HP pressure switch monitors pressure deviations in burner, ventilation, and air-conditioning systems. It is suitable for air, flue, exhaust gases, hydrogen, and gases of families 1, 2, and 3, including high-pressure applications.

What are the specifications of the DUNGS GW...A4 HP pressure switch?

The DUNGS GW...A4 HP is a CSA-certified (UL 508, CSA C22.2) adjustable pressure switch for high-pressure gas, air, and hydrogen. It features a ventless design and is intended for use per NFPA 54, IFGC, and CSD-1 codes. Specific pressure ranges are detailed in the datasheet.

Where to buy the DUNGS GW...A4 HP pressure switch in Singapore?

3G Electric supplies the DUNGS GW...A4 HP pressure switch to Singapore. We handle logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this CSA-certified model for high-pressure gas and hydrogen applications.

How to install the DUNGS GW...A4 HP pressure switch?

Installation must be done by a trained specialist. Ensure gas pressure and power are off before work. Mount the switch per the datasheet, connect pressure lines, and wire according to the diagram. After installation, perform a leak and function test as instructed by DUNGS.

Used in

Common applications for Dungs
Industrial steam boilers — MB-ZRDLE MultiBloc on modulating gas-fired plant
Hospital and hotel plant rooms — MB-D series for two-stage commercial burners
Food-industry ovens and dryers — DMV butterfly valves on high-turndown modulating lines
Petrochemical gas-train skid assemblies — FRS / FRSBV regulators with GW pressure switches
Retrofit drop-in replacements for older Dungs MB assemblies on existing Weishaupt / Riello burners

Dungs Products

3G Electric supplies Dungs pressure switch. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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