Quick connect coupling Mini Cupla 33PFB, brass - Nitto Kohki 331003835

Mini Cupla couplings from Nitto Kohki join hoses and pipework by hand, without tools. The small brass body fits equipment and workbenches where installation space is tight.

• Brass body resists corrosion and keeps its shape through repeated coupling
• The NBR seal sits in the socket, so the plug stays free of seals and takes rough handling
• Connect and disconnect by hand, with no tools and no threaded fittings
• Compact envelope for devices and benches with little room to spare
• Sockets and plugs in several connection variants, so a whole installation can be standardised

Technical data from the manufacturer catalogue

Dimensions

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

Legend: L = overall length; C = sleeve dimension; T = thread or barb size; B = bore

Models in this series MINI CUPLA / LINE CUPLA MINI

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

Operating principle

• From cylinders to torches, all piping connections associated with welding and cutting equipment are push-to-connect operations.
• Double-lip seal prevents minor leak during connection.
• Oxygen and fuel gas CUPLA have different sizes to prevent accidental interconnection.
• Pressure loss is minimized to achieve higher flow rate.
• Various types of end configurations have been standardized to comply with a wide range of welding and cutting equipment applications.
• Sockets themselves or plugs themselves are interchangeable with MINI CUPLA SUPER's counterparts.
• LINE CUPLA MINI is also available for multiple piping.
• Push-to-connect operation (built-in automatic shut-off valve in socket).

Series comparison

MINI CUPLA is the series to pick for the oxygen and fuel gas lines of gas welding and gas cutting equipment, because the oxygen and the fuel gas versions are made in different sizes so that the two gases cannot be interconnected by accident. Its working pressure is 0.7 MPa {7 kgf/cm2}, below the 1.0 MPa {10 kgf/cm2} of COMPACT ZEROSPILL CUPLA and PURGE LINE CUPLA and below the 1.5 MPa {15 kgf/cm2} of HI CUPLA BL, NUT CUPLA, LOCK CUPLA 200, HI CUPLA Two Way Type, ROTARY LINE CUPLA, ROTARY FULL BLOW LINE CUPLA and ROTARY PLUG, so compressed air lines at those pressures belong to one of those series. MINI CUPLA is one-way shut-off like them; where both sides have to close with reduced spillage, COMPACT ZEROSPILL CUPLA is the two-way shut-off alternative.

Body and seal materials

Applications

• Tool and device changes at assembly benches
• Connections on small equipment with limited installation space
• Test and measurement rigs that are rebuilt often
• Maintenance work where a line is disconnected briefly

Safety and application notes

• Before use, please be sure to read "Safety Guide" described at the end of this book and "Instruction Sheet" that comes with the products.
• Not suitable for vacuum application in either connected or disconnected condition.
• Fluid must run from socket to plug.
• Oxygen and fuel gas CUPLA are made in different sizes to prevent accidental interconnection; do not attempt to force a connection between them.
• Plugs with backflow stop valve are designed exclusively for gas welding and cutting, to prevent occurrence of gas mixing.
• Do not exceed the maximum tightening torque given for each model.

All technical data on this page is taken from the Nitto Kohki general catalogue Quick Connect Couplings C01en-b, page 69. The complete catalogue is available for download on this page.