VQ425MA1021 | Honeywell Class “A” Combination Gas Valve DN25 360 mbar
Honeywell · Valves & Process Control
Description The Honeywell VQ425MA1021 is a heavy-duty Class “A” combination safety valve block (DN25 / 1″ flange size) designed for high-capacity gas burner and boiler applications. It supports a maximum operating pressure of 360 mbar (≈ 36 kPa) and is suited for use with natural gas, propane or other non-corrosive gaseous fuels. Its dual-seat, fast-acting construction ensures reliable shut-off and flow control in demanding industrial environments. Technical Specifications Condition New / Never Used Surplus Brand Honeywell Category Flame Safety Products Part Number VQ425MA1021 Subcategory Combination Gas Valve Valve Class Class “A” (EN 161) Body Size / Flange DN25 (≈ 1″) Maximum Operating Pressure 360 mbar (36 kPa) Pipe Size Rp 1″ / 1″ Supply Voltage 115-230 V AC, 50/60 Hz (depending version) Opening Time ≈ 30 s (depending coil and config) Closing Time < 1 s Ambient Temperature Range –15 °C to +60 °C Body Material Aluminum Alloy Valve Plunger Material Chrome-plated steel, anti-friction bearing Seals & Gaskets NBR rubber (hydrocarbon resistant) Protection Class IP 65 (some variants) Number of Cycles Up to 500,000 cycles typical Duty Cycle Continuous energisation possible Weight ~5 kg (~11 lb) depending variant Information About VQ425MA1021 The VQ425MA1021 belongs to Honeywell’s VQ400M series of Class “A” combination valves configured for industrial burner applications. It pairs two safety shut-off valves (V1 and V2) in one body: the first valve opens rapidly while the second valve may be configured for fast or slow opening and/or flow regulation. The unit accommodates flange mounting (DN25) and features options for accessories like position indicators, bypass or vent valves, and pressure-switch tap points. In addition to its safety shut-off role, it conforms to EN 161 (Class “A”) standards and is suitable for use in gas trains of automatic burners, incinerators, melting furnaces, and large-capacity boilers. Key Features: Class “A” Certified Safety Valve: Meets EN 161 Class “A” requirements for gaseous fuel shut-off in industrial systems. Dual-Valve Design Block: Two safety valves (V1 and V2) built into one body for primary shut-off and controlled flow regulation. 360 mbar Maximum Operating Pressure: Supports moderate pressure gas systems up to ~36 kPa. Flange/Body Size DN25 (1″): Compatible with 1ʺ pipe or flange kits for industrial install flexibility. Fast Closing Time (<1 s): Ensures rapid shut-off under fault or emergency conditions. Flexible Opening Profile: Standard fast opening for V1; V2 optionally configured for slow or throttled opening. Wide Ambient Temperature Range: Suitable for –15 °C to +60 °C (≈ 5 °F to 140 °F) ambient installations. Robust Construction: Body made of aluminum alloy die-cast, plunger in chrome-plated steel, anti-friction bearings, NBR hydrocarbon-resistant seals. Mountable Accessories: Supports valve position indicator, pressure-switch taps, bypass or vent valves for system integration. The VQ425MA1021 delivers the performance, safety shut-off capability, and configurability required for high-duty industrial gas burner systems.
Brand: Honeywell · Category: Valves & Process Control
Key features
- Class “A” Certified Safety Valve: Meets EN 161 Class “A” requirements for gaseous fuel shut-off in industrial systems.
- Dual-Valve Design Block: Two safety valves (V1 and V2) built into one body for primary shut-off and controlled flow regulation.
- 360 mbar Maximum Operating Pressure: Supports moderate pressure gas systems up to ~36 kPa.
- Flange/Body Size DN25 (1″): Compatible with 1ʺ pipe or flange kits for industrial install flexibility.
- Fast Closing Time (<1 s): Ensures rapid shut-off under fault or emergency conditions.
- Flexible Opening Profile: Standard fast opening for V1; V2 optionally configured for slow or throttled opening.
- Wide Ambient Temperature Range: Suitable for –15 °C to +60 °C (≈ 5 °F to 140 °F) ambient installations.
- Robust Construction: Body made of aluminum alloy die-cast, plunger in chrome-plated steel, anti-friction bearings, NBR hydrocarbon-resistant seals.
- Mountable Accessories: Supports valve position indicator, pressure-switch taps, bypass or vent valves for system integration.
Specifications
| Manufacturer part number | VQ425MA1021 |
|---|---|
| Condition | New / Never Used Surplus |
| Brand | Honeywell |
| Category | Flame Safety Products |
| Part Number | VQ425MA1021 |
| Subcategory | Combination Gas Valve |
| Valve Class | Class “A” (EN 161) |
| Body Size / Flange | DN25 (≈ 1″) |
| Maximum Operating Pressure | 360 mbar (36 kPa) |
| Pipe Size | Rp 1″ / 1″ |
| Supply Voltage | 115-230 V AC, 50/60 Hz (depending version) |
| Opening Time | ≈ 30 s (depending coil and config) |
| Closing Time | < 1 s |
| Ambient Temperature Range | –15 °C to +60 °C |
| Body Material | Aluminum Alloy |
| Valve Plunger Material | Chrome-plated steel, anti-friction bearing |
| Seals & Gaskets | NBR rubber (hydrocarbon resistant) |
| Protection Class | IP 65 (some variants) |
| Number of Cycles | Up to 500,000 cycles typical |
| Duty Cycle | Continuous energisation possible |
| Weight | ~5 kg (~11 lb) depending variant |
| Product type | Combination Gas Valve |
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