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Product Description
The DHST040 Heavy-Duty Fire Nozzle Shutoffs is engineered for the most demanding industrial environments, including refineries, steel mills, and offshore platforms. Built to withstand extreme pressure, temperature, and chemical exposure, this nozzle features a rugged shutoff valve constructed from forged steel, ensuring reliability in scenarios where failure is not an option. Compliant with NFPA 1963-2025 and API 607 standards, the DHST040 delivers high-volume water flow with precise control, making it indispensable for suppressing large-scale industrial fires and managing high-pressure water systems.
Forged Steel Shutoff Valve
The valve body is crafted from AISI 4140 forged steel, heat-treated to 250–300 HB hardness for resistance to deformation under extreme pressure. It handles a maximum working pressure of 4.0 MPa (580 PSI) and a burst pressure of 12.0 MPa (1,740 PSI), exceeding industrial requirements .
High-Volume Flow Capacity
With a flow rate range of 200–450 GPM, the DHST040 is designed for large-scale fire suppression. Its multi-port nozzle tip allows switching between a powerful jet (penetration: 40+ meters) for deep-seated fires and a wide-angle fog (150°) for heat shielding and vapor control .
Chemical and Heat Resistance
The nozzle is coated with epoxy-phenolic resin (thickness: 80–100 μm), tested to resist exposure to hydrocarbons, acids, and alkalis for 1,000+ hours. The stainless steel internal components withstand temperatures up to 250°C, making it suitable for use near furnaces and molten metal .
Industrial-Grade Ergonomics
The dual-handle design distributes weight (7.2 kg) evenly, reducing operator fatigue during extended use. Handles are wrapped in heat-resistant silicone (up to 200°C) and feature anti-vibration grips to maintain control under high-pressure flow .
Safety Interlocks
Includes a locking pin to prevent accidental shutoff during critical operations and a pressure relief valve that vents excess pressure (>4.5 MPa) to protect hoses and operators. It is certified for use in hazardous areas (ATEX Zone 2) when paired with explosion-proof fittings .
Refineries and Petrochemical Plants: Suppresses tank fires, pipeline leaks, and flammable liquid spills with high-volume water or foam.
Steel Mills and Foundries: Used to cool molten metal spills and suppress fires in machinery and storage areas.
Offshore Oil Platforms: Corrosion-resistant design withstands saltwater and harsh marine conditions.
Power Plants: Manages fires in turbine rooms, transformer yards, and fuel storage facilities.
Mining Operations: Suppresses underground fires and controls dust during rescue operations.
Q: What is the service life of the shutoff valve under heavy use?
A: With proper maintenance, the valve is rated for 15,000+ cycles (open/close operations) in industrial settings.
Q: Can it be automated for remote operation?
A: Yes, an optional pneumatic actuator can be installed to enable remote shutoff/flow control, compatible with SCADA systems.
Q: What maintenance is required in corrosive environments?
A: Inspect and re-coat with epoxy-phenolic resin annually. Replace O-rings every 6 months with Viton® seals for chemical resistance.
