NITTO KOHKI 6S-A High Pressure Quick Connect Air Coupler (4.5 MPa)

NITTO KOHKI 6S-A High Pressure Quick Connect Air Coupler (4.5 MPa)
NITTO KOHKI 6S-A (SP Cupla Type A) is a high-end industrial pneumatic and fluid quick connect coupler from Japan. Designed for medium to high-pressure applications, its key feature is the two-way automatic shut-off valve system on both the plug and socket sides. This mechanism immediately shuts off and seals the fluid upon disconnection, completely preventing pneumatic pressure blowouts or chemical liquid leaks. The body is made of high-quality materials capable of withstanding working pressures up to 4.5 MPa (45 bar). The newly designed valve structure (Self-aligned valve) increases flow rate by 7% to 64% compared to conventional models, delivering excellent reduction in system pressure drop.
Features
Automatic Two-Way Shut-Off Valve: Automatic shut-off valve system on both sides seals immediately upon disconnection, maximizing safety on industrial jobsites.
High Pressure Resistance: Extra-robust construction withstands continuous working pressure up to 4.5 MPa (depending on steel/stainless steel material grade) for heavy-duty applications with confidence.
Advanced Valve Design: Self-aligned return valve system prevents misaligned sealing and minimizes long-term leakage issues.
High Flow Capacity: Improved internal geometry streamlines air and fluid flow better than conventional couplers, increasing flow rate by up to 64%.
Bi-Directional Fluid Flow: Fluid flows freely in both directions when completely connected and locked.
Applications 
High-pressure air pipeline systems and pneumatic equipment in automotive assembly plants and heavy industries
Pipeline systems for hydraulic oil, chemicals, gas, or distilled water in machine cooling systems
Air hose connection to high-pressure air compressors requiring safety against air blast when disconnecting hoses
Machinery maintenance requiring frequent fluid line disconnections and relocations without fluid loss in the system
Specifications
Brand: NITTO KOHKI (Japan)
Model: 6S-A (SP Cupla Type A Series)
Product Type: Socket Female Thread
Application Size: 3/4 inch (Rc 3/4)
Valve system: Two-Way Shut-Off
Working Pressure: 0 ~ 4.5 MPa (45 bar / 653 PSI)
Standard Seal Material: Nitrile Rubber (NBR / SG)
Working Temperature: -20°C to +80°C
Vacuum Suitability: Suitable for vacuum when connected