At EMACO GLOBAL, we specialize in delivering advanced fire protection solutions that safeguard lives, assets, and critical infrastructure. One of our premier offerings in industrial and municipal fire safety systems is the RA. Medium Velocity Fixed Spray Nozzle. Designed for special hazard applications, this nozzle combines precision engineering, robust construction, and international certifications to ensure reliable performance in high-risk environments.
The reverse action medium velocity water spray nozzle is an essential component in deluge water spray systems, engineered to provide uniform directional coverage for fire suppression. With its open-type, non-automatic design and carefully calibrated deflector, this nozzle delivers rapid and effective fire control across oil refineries, chemical plants, storage tanks, transformer yards, and other critical industrial facilities.
Understanding Reverse Action Medium Velocity Water Spray Nozzle Technology
The RA. The Medium Velocity Fixed Spray Nozzle/Reverse Action Medium Velocity Water Spray Nozzle is designed as an open, non-automatic device that discharges water at medium velocity through a controlled, cone-shaped pattern. This design ensures optimal droplet size, maximizing cooling efficiency and flame knockdown while providing exposure protection for nearby equipment.
Unlike standard sprinklers that operate automatically under heat, the water spray nozzle works within a deluge system. When a fire is detected, multiple nozzles activate simultaneously, delivering a rapid response to high-hazard areas and ensuring immediate protection for critical assets.
How the Reverse Action Medium Velocity Water Spray Nozzle Works
- Reverse Action Mechanism: The nozzle features a reverse action design that prevents water from dripping when inactive, ensuring system readiness.
- External Deflector: Precisely engineered deflectors create a controlled spray pattern and coverage angle.
- Cone-Shaped Spray: Delivers a uniform water cone that efficiently cools surfaces and suppresses flames.
- Optimized Droplet Size: Balances water momentum and cooling capacity for effective suppression of hydrocarbon and chemical fires.
Technical Specifications and Options
- K-Factors: Available in K 22, K 30, K 42, K 53, and K 60, allowing designers to select the ideal flow rate for various hazards.
- Materials: High-quality brass, stainless steel, or bronze for durability, corrosion resistance, and long-term reliability.
- Inlet Connections: Standard ½ inch and ¾ inch BSPT threading compatible with most industrial piping systems.
- Working Pressure: Optimized for 2.1 bar to 7 bar operation, ensuring consistent performance.
- Spray Angles: 65°, 80°, 90°, and 120° options for flexible coverage.
- Design Efficiency: Uniform droplet distribution and precise spray patterns guarantee effective fire suppression.
Advantages of Using Reverse Action Medium Velocity Water Spray Nozzle
- Certified Performance: UL Listed and FM Approved for global fire safety compliance.
- Versatile Spray Angles: Wide range from 65° to 160° for comprehensive coverage.
- Material Options: Brass, stainless steel, and aluminum bronze for resistance to corrosion and harsh conditions.
- Durable Construction: Long-lasting performance with minimal maintenance.
- Customizable Finishes: Natural brass or epoxy powder-coated options for extra protection.
- Effective Fire Suppression: Optimized droplet size ensures both surface cooling and flame knockdown.
Applications of RA. Medium Velocity Water Spray Nozzle
The versatility of the medium-velocity water spray nozzle makes it ideal for numerous high-risk scenarios:
- Transformer Protection: Provides cooling and flame control for outdoor transformers exposed to electrical faults or oil leaks.
- Storage Tank Safety: Reduces boil-over risks in flammable liquid storage tanks while preserving structural integrity.
- Chemical and Petrochemical Plants: Protects reactors, pipelines, and vessels containing volatile chemicals.
- Power Generation Facilities: Safeguard turbines, cable galleries, and diesel generators from fire hazards.
- LPG and Gas Installations: Delivers exposure protection for LPG spheres, bullet tanks, and manifold stations.
- Marine and Offshore Platforms: Offers water-based fire suppression for equipment in hydrocarbon-rich environments.
Installation Guidelines for Water Spray Nozzles
Proper installation ensures maximum efficiency:
- Orientation: Position nozzles based on hydraulic calculations to achieve full coverage.
- Spacing: Adhere to NFPA, UL, and FM standards to prevent dry zones.
- Hydraulic Testing: Verify system pressure and flow post-installation.
- Accessibility: Ensure easy inspection, cleaning, and replacement.
Maintenance and Handling
To maintain performance and extend nozzle life:
- Routine Inspection: Check quarterly for blockages, corrosion, or damage.
- Cleaning: Use mild agents to remove dust, dirt, and salt deposits. Avoid abrasives.
- Performance Testing: Periodic flow tests ensure proper spray and pressure compliance.
- Replacement: Replace any damaged nozzles immediately.
- Storage: Keep spare nozzles in a dry, clean, corrosion-free environment.
Why Choose EMACO GLOBAL?
Selecting EMACO GLOBAL ensures:
- Globally recognized UL/FM certifications.
- Wide material and finish options are suitable for all environments.
- Expert engineering to comply with NFPA, FM, and international codes.
- Proven reliability in industrial, municipal, and offshore systems.
- Dedicated after-sales support for maintenance, inspection, and spare parts.
Frequently Asked Questions (FAQs)
- What is the difference between medium-velocity and high-velocity water spray nozzles?
Medium-velocity nozzles release larger droplets at moderate speeds for surface cooling and exposure protection. High-velocity nozzles generate finer droplets at higher speeds for penetrating flammable liquid fires. - Can the reverse action medium velocity water spray nozzle be used in corrosive environments?
Yes. Stainless steel and aluminum bronze options resist corrosion in chemical plants, refineries, and marine applications. - What is the lifespan of a water spray nozzle?
With proper installation and maintenance, EMACO GLOBAL nozzles can last 10–15 years or longer, depending on operating conditions. - How often should the nozzles be tested?
Annual inspection and testing are recommended to verify spray distribution, pressure, and flow, following NFPA and FM standards. - Are custom spray angles available?
Yes. Standard angles range from 65° to 160°, with custom patterns available on request to suit unique layouts or hazards.
