Quick connect coupling HI Cupla BL 20SF-BL, R 1/4, steel - Nitto Kohki 313102561

Running pneumatic tools off a factory air line calls for a coupling that shuts the supply the instant it is parted. The Nitto Kohki HI Cupla BL works up to 1.5 MPa (15 bar) and carries the automatic shut-off valve in the socket.

• Working pressure of 1.5 MPa (15 bar, 218 PSI) in steel and stainless steel
• Automatic shut-off valve in the socket keeps the supply closed as soon as the plug is pulled out
• Critical structural parts of the steel version are heat-treated for higher strength and wear resistance
• End sizes 1/4", 3/8" and 1/2" as hose barb, male thread or female thread
• NBR seal (marked SG) for -20 °C to +80 °C, FKM (X-100) is available for service up to +180 °C
• Free cross-section of the connection is 13 mm² to 33 mm² depending on the pairing

Technical data from the manufacturer catalogue

Dimensions

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

Legend: L = overall length; H = width across flats or outside dimension; D = socket outside diameter; T = thread or barb size

Models in this series HI CUPLA BL

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

Operating principle

• Separation prevention mechanism prevents accidental disconnection.
• An excellent general purpose coupling for connecting factory air supply to pneumatic tools.
• Steel coupling is suitable for air. Stainless steel is suitable for water. Note that fluid will come out from the plug when disconnected.
• Critical structural parts made of steel are heat-treated for increased strength giving greater durability and resistance to wear.
• Various body materials, sizes, and end configurations are available.
• SN-BL type for connection to urethane hose requires no hose clamp.
• Separation prevention mechanism is easily locked by turning the sleeve after connection.

Series comparison

HI CUPLA BL suits a 1.5 MPa {15 kgf/cm2} line that has to be secured against accidental disconnection: it is one-way shut-off like NUT CUPLA, LOCK CUPLA 200, HI CUPLA Two Way Type, ROTARY LINE CUPLA, ROTARY FULL BLOW LINE CUPLA and ROTARY PLUG at the same pressure, but adds the sleeve lock. Where no fluid may escape at disconnection, COMPACT ZEROSPILL CUPLA shuts off on both sides, at the cost of a working pressure limited to 1.0 MPa {10 kgf/cm2}; the same 1.0 MPa {10 kgf/cm2} limit applies to TWIST PLUG. Up to 1.5 MPa {15 kgf/cm2} all of these series are candidates, so the decision rests on the locking requirement rather than on the pressure rating.

Body and seal materials

Applications

• Pneumatic tools on the workshop or factory air line
• Automatic woodworking and assembly machines
• Water lines using the stainless steel version
• Changeover stations where the line is parted and remade several times a shift
• Plant sections that mix hose barbs and threaded ends within one size

Compatibility

Sockets and plugs of models 10, 17, 20, 30 and 40 connect with each other regardless of end configuration. They cannot be connected to models 400, 600 and 800, while the range remains interchangeable with HI Cupla 200, Nut Cupla, Nut Cupla 200 and Line Cupla.

Standards and compliance

Threaded ends are made as Rc and R threads from 1/4" to 1/2", the sealing material is nitrile rubber (NBR, marked SG).

Safety and application notes

• Note that fluid will come out from the plug when disconnected, because the valve structure is one-way shut-off.
• Before use, please be sure to read the Safety Guide described at the end of this book and the 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 41. The complete catalogue is available for download on this page.