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Quick-Connecting Fluid Couplers

Fluid couplings are indispensable in providing connections in systems that involve the flow of air, water, oil, or gas. Nitto Kohki couplings are distinguished by their high quality and durability. Their safe, easy one-hand connection and disconnection enables superior operability. Their built in automatic open and shut valve provides high flow, easy flow control and realizes a perfect seal. To meet diverse needs for couplings for applications in the home as well as in the medical, biotechnology, nuclear, semiconductor and computer fields, Nitto Kohki offers a full product line-up comprising of 3,000 series and some 25,000 individual models.

Nitto Kohki couplers provide quick and easy connection/disconnection of fluid lines such as water, oil, gas, and air. They completely eliminate the inconvenience of connecting/disconnecting conventional thread type couplings or flanges, fluid leakage, and hose kinking, while providing quick, convenient control and maintenance of fluid line connections.

 
Full Blow Cupla (air)
Low pressure loss & high flow rate.
  • Energy-saving design and up to a 40% increase in flow rate.
  • Available for hose, male-thread, female-thread and urethane hose connections.
Specifications
Applicable Fluids Air & inert gas
Body Material Aluminium Alloy
Working Pressure*1 1.5MPa (15kgf/cm2)
Pressure Resistance*2 2.0MPa (20kgf/cm2)
Packing Material Nitrile butadiene rubber
Working Temperature Range -5°C ~ +60°C
Suitability for Vacuum Applications Not suitable for use with vacuum,
either alone or in combination.
Interchangeability Hi Cupla Series plugs*3.
*1: Allowable pressure when the Cupla is used continuously.
*2: Maximum surge pressure that will not affect the performance
     of the Cupla.
*3: Can not be interchanged with some plastic plugs.

 

Valve open or close operation

Built-in lock operation

Purge operation

 

Cube Cupla

Click here to view a PDF specification sheet (619 KB).

Features:

  • Suitable for a wide range of applications from medical/scientific equipment to beverage machines and semiconductor manufacturing equipment.
  • No tools required for connection/disconnection.
  • Compact body - can be installed anywhere.
  • Internal valves in socket and plug.
  • Super light-weight.

Pneumatic HI-CUPLA

Features:

  • Available in steel, brass and stainless steel.
  • One-way automatic shut-off valve in the socket.
  • Wide variety provides best choice according to application.
  • Hardened parts are extremely wear resistant and durable.
  • Tested 10,000 times, coupler connection is accurate and reliable.

Plastic HI-CUPLA ACE

Features:

  • Body made of engineering plastics with excellent strength.
  • Owing to lightweight body, there is little risk of damage if it contacts unfinished work such as an automobile.
  • A built-in "automatic locking mechanism" to lock the sleeve when coupled, thus preventing accidental detachment.
  • Plug and socket connection is a simple one-touch operation.
  • Bi-directional fluid flow from socket or plug.
  • Can be used for air, water, and inert gases.
  • Plug is interchangeable with Nitto Hi Cupla Series.

Semiconductor Semicon Cupla

Features:

  • Durability and resistance against chemicals are ensured by the use of tetrafluororesins for all materials.
  • Both the socket and plug are provided with automatic shut-off valves to enhance operational ease.
  • Handling safety is assured because there is no elution of metallic ion from the contact part with fluid.
  • Superb reliability is provided by inspection, assembly and packaging conducted in a clean room.

Ultra Small Micro Coupler

Features:

  • Instant shut-off valve.
  • Super small coupling.
  • Easy to handle.
  • Excellent anticorrosiveness.
  • Wide selection.