A Dry Disconnect Coupling (often called a Dry Break Coupling) is a quick-connect fluid transfer device designed to prevent spills, leaks, and contamination when connecting or disconnecting hoses, pipelines, or tanks.
It is commonly used in industries handling hazardous, flammable, or high-value liquids where safety and cleanliness are critical.
Main Components
Coupler (Hose Unit) – attaches to the hose end.
Adaptor (Tank Unit) – fixed to the tank, manifold, or piping.
Valve System
Both coupler and adaptor contain internal valves that automatically close upon disconnection to prevent fluid loss.
Materials
Body: Aluminum, stainless steel, brass, or composite.
Seals: Viton®, EPDM, NBR, PTFE, or other elastomers compatible with the fluid.
Connection Method
Push-and-turn locking system, typically with three-lug bayonet or cam profile.
Size Range: DN25 (1") to DN150 (6")
Working Pressure: Up to 16 bar (232 psi), higher for specialized designs
Temperature Range: –20 °C to +80 °C standard (higher with special materials)
Flow Rate: High flow with minimal pressure drop due to full-bore design
Standards: Often compliant with NATO STANAG 3756, API RP1004, or EN 14432
Petroleum & Fuels – truck loading/unloading, aviation refueling, marine bunkering
Chemical Industry – acids, solvents, and hazardous liquids
Food & Beverage – edible oils, syrups, and beverages with hygienic versions
Pharmaceutical – high-purity liquid transfer
Marine & Offshore – transfer of fuels, lubricants, and chemicals to ships or rigs
Spill Prevention – minimal product loss during disconnection
Operator Safety – reduces exposure to hazardous liquids and vapors
Environmental Protection – prevents soil and water contamination
Quick & Easy Operation – push-turn connection saves time
Versatility – available in multiple materials and seal types for different media
