Quick connect coupling Full Blow Cupla FBH-40SH, aluminium - Nitto Kohki 318404301

Every coupling in an air line throttles the flow and makes the compressor deliver more. The Nitto Kohki Full-Blow Cupla opens the passage completely through a gate type valve and reaches up to 40 % more flow than conventional Cupla couplings.

• Full-open gate type valve, flow rate rises by up to 40 % over conventional Cupla couplings and lowers the source air volume required
• The valve is closed during connection and disconnection, so the line can be made and parted at zero pressure
• Purge function: returning sleeve B releases the residual pressure in the plug, which removes the loud pop and the hose whip on disconnection
• Built-in sleeve lock operated by the flange prevents accidental disconnection
• The valve can be opened and closed while socket and plug stay connected, so the line can be shut without parting it
• Aluminium alloy body at 30 to 45 % less weight than conventional Cupla couplings, a socket weighs 64 g to 90 g depending on the end configuration

Technical data from the manufacturer catalogue

Dimensions

Dimensions in millimetres. Values in brackets apply in the connected condition.

Legend: L = overall length; A = hose barb length; T = thread or barb size; B = bore

Models in this series FULL BLOW CUPLA

Every model of the series as printed in the manufacturer catalogue. The row of the article offered here is highlighted.

Operating principle

• The flow rate is increased by up to 40% more than that of HI CUPLA.
• During connection and disconnection, the valve is closed, enabling connection/disconnection under zero line pressure.
• When the sleeve of socket is returned to its original position, the purge mechanism releases the residual air pressure in the plug, eliminating unpleasant popping noise and hose whip motion on disconnection.
• Separation prevention mechanism prevents accidental disconnection of CUPLA, ensuring safe operation.
• The valve can be opened and closed while the socket and plug are connected.
• The weight is reduced by 30 to 45% compared with that of conventional CUPLA.
• Plug and socket with hose guard nut are also available (see page 68 of NK CUPLA HOSE for details).
• Unique full-open gate type valve mechanism realizes low pressure loss and high flow rate, which reduces required source air volume.

Series comparison

Choose FULL BLOW CUPLA when the air line works at up to 1.5 MPa {15 kgf/cm2} and the 1.0 MPa {10 kgf/cm2} of MICRO CUPLA, SMALL CUPLA, COMPACT CUPLA, CUBE CUPLA and SUPER CUPLA is not enough. Against the equally rated HI CUPLA, HI CUPLA 200, LINE CUPLA 200 and HI CUPLA ACE it adds the purge of the residual air pressure in the plug and valve opening and closing in the connected state, while staying one-way shut-off and interchangeable with plugs of the HI CUPLA series. Where the line itself has to shut off, it is preferable to the straight through LEVER LOCK CUPLA.

Body and seal materials

Applications

• Air lines with high consumption where the pressure loss of the coupling matters
• Connecting pneumatic tools to hose lines and manifolds
• Workplaces where the line is parted under residual pressure and the hose must not whip back
• Polyurethane hose from ø6.5 x ø10 mm to ø11 x ø16 mm on the SN type sockets
• Line sections that are shut off briefly for a tool change instead of being parted

Compatibility

The sockets connect with plugs of HI Cupla models 10, 17, 20, 30 and 40 and are interchangeable with the other products of the HI Cupla series. Some plugs of the plastic HI Cupla 250 are not interchangeable.

Standards and compliance

End sizes are 1/4", 3/8" and 1/2" as Rc and R threads or hose barbs, tightening torques are 14 Nm, 22 Nm and 60 Nm, the sealing material is nitrile rubber (NBR, marked SG) for -20 °C to +60 °C.

Safety and application notes

• Note: Direct mounting of FULL BLOW CUPLA to percussive and vibrating tools should be avoided.
• Fluid must run from socket to plug.
• Not suitable for vacuum application in either connected or disconnected condition.
• Before use, please be sure to read "Safety Guide" described at the end of this book and "Instruction Sheet" that comes with the products.

All technical data on this page is taken from the Nitto Kohki general catalogue Quick Connect Couplings C01en-b, page 49. The complete catalogue is available for download on this page.