1.Open-Close Type Quick-connect Coupling
Thread standard: Supports UN/UNF inch straight threads and metric M-series threads for matching diverse hose assemblies
Sealing principle: Double-sided built-in spring valve structure. When two halves connect, the internal valves open mutually to form a full fluid passage; upon separation, both valves instantly close to lock liquid inside the hose, avoiding medium leakage without auxiliary sealing accessories.
Applicable scenarios:
- Hydraulic machinery, engineering vehicles and agricultural equipment
- Oil delivery pipelines with frequent disassembly demands
- Medium-low pressure hydraulic circulation systems
Selection Tip: This coupling features anti-leakage disconnection design and strong pressure resistance. For oil medium with high viscosity, select models with enlarged flow channels. Tighten the threaded nut to specified torque during installation to prevent thread loosening under vibration.
2. Flat Face Quick -connect Coupling
Thread standard: Straight UN/UNF thread as mainstream, metric thread versions optional
Sealing principle: Fully flat contact end face with integrated built-in O-ring. Two flat surfaces compress the rubber ring tightly after connection to form zero-gap positive pressure seal; no residual fluid spills on the flat surface during separation.
Applicable scenarios:
- Ultra-high pressure hydraulic systems (max working pressure up to 70 MPa)
- Precision testing equipment and environmental protection machinery with strict anti-leakage standards
- Equipment working under drastic temperature alternation
Selection Tip: Flat face quick couplings are widely acknowledged as the top leak-free quick connection solution. Confirm O-ring material compatibility with hydraulic fluid: fluorine rubber for high-temperature or phosphate ester oil environments, nitrile rubber for general mineral oil.
3. Car Wash Quick Coupling
Thread standard: Universal garden hose thread, 1/4", 3/8", 1/2" inch standard interface for pressure washers
Sealing principle: Internal integrated rubber sealing gasket. Snap-type quick lock structure forms tight compression seal when male and female ends lock; lightweight soft seal design adapts to frequent handheld plugging and unplugging.
Applicable scenarios:
- High-pressure car washing machines, floor cleaning equipment
- Household water flushing, garden irrigation pipelines
- Mobile cleaning equipment with frequent short-term disassembly
Selection Tip: This lightweight coupling is customized for low-to-medium pressure water circuits, not applicable to hydraulic oil systems. Pick anti-aging EPDM sealing gaskets for long-term outdoor use, and avoid over-twisting to prevent gasket deformation and water leakage.
