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Product Description
The DHST042 Professional Fire Nozzle Shutoffs is a premium firefighting tool engineered for elite fire services and industrial response teams. Combining precision flow control with rugged durability, this nozzle features a dual-mode shutoff valve that enables instantaneous adjustment from full flow to complete shutoff, critical for managing complex fire scenarios. Compliant with NFPA 1963-2025 and EN 15022 standards, the DHST042 delivers unmatched performance in high-stakes environments, from high-rise structural fires to industrial chemical emergencies. Its ergonomic design and advanced materials make it a trusted asset for professionals requiring reliability under pressure.
The patent-pending shutoff valve operates in two stages: a partial closure for flow reduction (30–70% adjustment) and a full closure to stop water flow entirely. This allows operators to fine-tune output without disrupting hose pressure, reducing water waste by up to 50% compared to single-stage valves .
With a flow rate range of 100–300 GPM at 3.0 MPa (435 PSI), the DHST042 outperforms standard nozzles in high-intensity scenarios. Its precision-machined tip produces a focused jet (penetration distance: 30+ meters) for deep-seated fires and a wide fog pattern (120° coverage) for vapor suppression .
The nozzle body is crafted from titanium alloy (Ti-6Al-4V) with stainless steel internal components, reducing weight to 3.8 kg while maintaining a burst pressure rating of 9.0 MPa (1,305 PSI). The exterior features a heat-resistant ceramic coating that withstands temperatures up to 200°C, protecting operators from radiant heat .
The dual-trigger design separates flow adjustment and shutoff functions, allowing one-handed operation even with gloved hands. A textured rubber grip with moisture-wicking properties ensures secure handling in wet conditions, while the balanced weight distribution minimizes wrist strain during extended use .
Meets NFPA 1963-2025 standards for leak tightness (≤0.1 L/min at 3.0 MPa) and durability (10,000+ shutoff cycles without failure). It is certified for use with foam concentrates (AFFF, FFFP) and carries UL 1926 and CE markings for global compatibility .
High-Rise Firefighting: The focused jet penetrates multiple layers of building materials, while the shutoff valve prevents pressure loss when repositioning on ladders or aerial platforms.
Industrial Chemical Fires: Compatible with foam systems, ideal for suppressing flammable liquid spills in refineries and chemical storage facilities.
Airport Rescue & Firefighting (ARFF): Rapid flow adjustment supports both aircraft exterior cooling and interior fire suppression.
Urban Search & Rescue: Compact design (length: 45 cm) fits through narrow openings in collapsed structures.
Military Applications: Rugged construction withstands harsh field conditions, including sand, dust, and extreme temperatures.
Q: How quickly can the shutoff valve transition from full flow to closed?
A: The valve completes full closure in 0.8 seconds, among the fastest in the industry, critical for preventing water hammer in high-pressure lines.
Q: Is it compatible with low-pressure hydrant systems?
A: Yes, it operates efficiently at pressures as low as 1.0 MPa (145 PSI), though optimal performance is achieved at 2.0–3.0 MPa.
Q: What maintenance is required for the shutoff valve?
A: Disassemble and clean the valve every 3 months (or after 200 hours of use). Lubricate moving parts with high-temperature silicone grease to prevent seizing.
Q: Can the nozzle tip be replaced with different patterns?
A: Yes, interchangeable tips (jet, fog, combination) are available and can be swapped in under 30 seconds without tools.
