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Fire Couplings and Adapters

-- Steady & Reliable Manufacturer --

Introduction: Essential Connections for Seamless Water Flow

Fire couplings and adapters are the indispensable link between fire hoses, risers, hydrants, and pumpers, ensuring a secure, pressure-tight connection for delivering water. Given their role in high-pressure systems, the quality and precision of these components are paramount to prevent system failure. Our comprehensive range includes internationally recognized standards such as Storz, British Instantaneous (BS 336), John Morris (JM), Machino, and North American style (NST/NH), manufactured to strict dimensional tolerances.

We utilize high-grade materials, primarily forged aluminum alloy, brass, and gunmetal, selected for their optimal balance of strength, lightweight handling, and corrosion resistance. Crucially, all threaded and quick-connect couplings are precision CNC machined to ensure perfect engagement and minimal leakage under the highest working pressures. Our couplings are designed for quick engagement and reliable sealing, often incorporating durable rubber gaskets (NBR/EPDM) that resist wear and degradation from continuous water exposure.

By offering a full suite of types and sizes (from DN25 to DN150), alongside adapters that bridge different standards, we serve as a one-stop source for global firefighting network requirements, guaranteeing interoperability across diverse infrastructure standards. (Approx. 520 words)

Advantage: Precision Machining and Material Integrity

  • Precision CNC Machining: All mating faces and threads are machined to extremely tight tolerances, ensuring a leak-proof seal and smooth, fast connection under pressure.
  • Forged Material Strength: Utilizing forged (not cast) aluminum and brass/gunmetal provides superior tensile strength and fatigue resistance, essential for high-pressure durability.
  • Corrosion Resistance: Offerings in high-grade aluminum and gunmetal are designed to withstand harsh environments, including saltwater and industrial chemicals.
  • Broad Standard Coverage: Stocking and manufacturing couplings for all major global standards (Storz, BS, Machino, NST), facilitating single-source procurement for international clients.
  • Durable Sealing Gaskets: Supplied with NBR or EPDM gaskets that maintain elasticity and sealing performance across a wide temperature and pressure range.
  • Fast Locking Mechanism: Quick-connect systems (like Storz) feature robust locking lugs that ensure secure engagement with a simple turn, crucial for emergency speed.

Specification: Coupling Standards and Materials

Coupling Standards Storz (German/European), BS 336 (British Instantaneous), Machino (Japanese), NST/NH (North American), John Morris (JM)
Material Options Forged Aluminum Alloy, Brass, Gunmetal (Copper Alloy)
Nominal Size Range DN25 to DN150 (Dependent on Type)
Working Pressure Up to 16 bar (232 psi)
Test Pressure 24 bar (348 psi)
Gasket Material NBR or EPDM Rubber (High Durability)
Connection Type Hose Tail, Female/Male Thread, Blind Cap, Adapter
Thread Standards BSP, NPT, NPSH (Appropriate to coupling type)
Standard Compliance Relevant national standards (e.g., DIN, NFPA 1963, BS)

Interoperability Across Fire Networks

Municipal Fire Brigades

Standardized Storz or BS couplings used on hoses for city fire engine pumpers and connections to ground hydrants.

Industrial Plant Risers

Heavy-duty brass/gunmetal couplings used in fixed industrial fire suppression risers where corrosion resistance is essential.

Marine and Offshore

Couplings made from corrosion-resistant gunmetal or stainless steel for use on ship decks, ports, and offshore platforms.

International Projects

Adapter fittings (e.g., Storz to Instantaneous) used to ensure compatibility between fire equipment from different national origins.

Temporary Water Transfer

Large diameter couplings (e.g., DN100/150) used for high-volume, temporary water relaying during large-scale industrial incidents.

Grow Your Bussiness With KAITUO

  • INNOVATION

    Professional R&D Team

    We have a professional R&D team of over 15 people who are able to provide innovative products and customized design services to our customers.

  • QUALITY

    Product quality assurance

    We adhere to quality as a lifeline for our business development, and strict quality management systems ISO and CE, as well as a variety of advanced quality testing equipment are our guarantees for product quality.

  • PRODUCTION CAPACITY

    Annual output exceeds 400,000

    Every month over 400,000 pcs of kinds of valves, including fire extinguisher valve, lpg valve, marine gas cylinder valve and so on.

  • SERVICE

    One-stop service

    We have complete design, and product development, testing and quality control are all carried out in the factory, which to a certain extent guarantees the high quality and performance of Kaituo fire equipment.

Payment & Shipping: Flexible Global Trade Solutions

We offer comprehensive and secure international trade terms tailored to our global clientele.

  • Accepted Payment Methods:

    Wire Transfer (T/T): Standard 30% deposit to confirm the order, 70% balance upon presentation of Bill of Lading (B/L) copy.

    Letter of Credit (L/C): Irrevocable L/C at sight for large orders, providing maximum financial security for both parties.

  • Shipping Terms (Incoterms):

    FOB (Free On Board): Ningbo Port is our standard shipping hub.

    CIF/CFR: Available upon request; we manage shipping logistics to your designated port.

  • Packaging:

    Couplings are individually wrapped and boxed/crated based on material and size, with thread protectors installed on all male threads to prevent damage during transit.

Comprehensive Information Summary

Minimum Order Quantity (MOQ) 300 Units (Per Size/Standard)
Lead Time 35-45 Days (Dependent on Forging/CNC Process)
Packaging Individual Wrapping/Boxing, Securely Crated with Thread Protectors.
Certifications ISO 9001, Material Test Certificates, Compliance to DIN/BS/NFPA Standards.
Raw Materials Forged Aluminum Alloy (6061), Brass/Gunmetal (LG2), NBR/EPDM Gasket.
Customization Options Custom Threading, Adapter Configurations, Laser Engraving/Casting, Specific Gasket Material.

Professional Usage Tips

  1. Visual Gasket Check:

    Before every use, visually inspect the internal gasket for cuts, cracks, or signs of compression. A damaged gasket is the leading cause of leakage at high pressure.

  2. Coupling Engagement:

    Ensure quick-connect couplings (e.g., Storz) are fully engaged and locked by giving them a firm quarter-turn after mating to prevent sudden disengagement under pressure.

  3. Thread Protection:

    For threaded couplings (e.g., NST/NPT), always use thread protectors/blind caps when disconnected to prevent thread damage from impact or contamination.

  4. Lubrication (Threads):

    Threaded couplings should be periodically inspected and lightly lubricated with appropriate non-petroleum grease to prevent seizing, especially in brass or gunmetal types.

  5. Material Selection for Environment:

    Always specify brass or gunmetal for permanent outdoor or marine installations, as aluminum alloy is susceptible to surface corrosion in prolonged contact with saltwater.

Get in Touch

ABOUT KAITUO
Ningbo Kaituo Valve Co., Ltd., also known as Ningbo Anke Fire Equipment Co., Ltd., is China Fire Couplings and Adapters Manufacturers and Wholesale Fire Couplings and Adapters Factory, specializing in the research and development, production and export of fire equipment. It owns the anke brand and a number of national high-tech patents.
Founded in 2001, our company mainly provides high-quality fire protection products for the international market, specializing in the production of various types of fire extinguisher accessories, marine gas cylinder valves, gas valves, etc. After years of hard work and continuous improvement of process reform, our products are exported to dozens of countries around the world and have won a good international reputation. All of our products have obtained the EU EN, CE certification in 2007.
Welcome all customers to call and visit us. Our company has a professional sales team to provide accurate services.
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FAQ

The Storz is a symmetrical quick-connect coupling, meaning both ends are identical, allowing for rapid connection regardless of orientation. The British Instantaneous is also quick-connect but is asymmetrical (male/female) and requires a specific orientation.

Forging results in a non-porous, internally uniform metal structure with superior grain flow, offering much higher strength and resilience to high-pressure shock and fatigue compared to common cast metal.

NST stands for National Standard Thread, which is the standardized fire thread used throughout the US and some parts of North America for connecting fire hoses and apparatus.

While gaskets within the same standard (e.g., all DN65 Storz gaskets) are typically interchangeable, you cannot use a gasket from one standard (e.g., Storz) in a coupling of a different standard (e.g., Machino).

Yes, couplings of different metals (e.g., aluminum and brass) can be mated successfully, provided they share the same standard and size (e.g., DN65 Storz). However, attention must be paid to galvanic corrosion over long-term permanent coupling.

NFPA standards recommend that all couplings, when attached to a hose, undergo a hydrostatic test every 5 years to ensure they maintain integrity under maximum operating pressure.

A Blind Cap is a protective cover used to seal a coupling outlet when it's not in use. It prevents thread damage, keeps out dirt and debris, and is essential for maintaining pressure in permanently charged systems.

Yes, we supply the appropriate spanners or wrenches required for the respective coupling type (e.g., Storz wrenches, Instantaneous spanners) as separate items or bundled with large orders upon request.

Custom engraving (laser or cast-in) usually requires an MOQ starting from 300 units per coupling size/type, ensuring the material can support the process without compromising strength.

We primarily offer adapters using BSP (British Standard Pipe), NPT (National Pipe Taper), and NPSH (National Pipe Straight Hose) to interface with common industrial and regional piping/hose systems.