Quick connect coupling HW Cupla HW-3S-F, R 3/8, brass - Nitto Kohki 599863161

A mould change means breaking temperature control lines while the medium is still hot. The Nitto Kohki HW Cupla is designed for water from -20 °C to +180 °C and shuts off on both sides when it is disconnected.

• Working temperature range of -20 °C to +180 °C with a rubber selected for hot water
• Working pressure of 2.0 MPa (20 kgf/cm²)
• Two-way shut-off, socket and plug both close on disconnection and the hot medium stays in the line
• Safety lock as standard specification, the lock ring prevents accidental disconnection caused by vibration or impact
• Double O-ring in the socket for an improved seal
• Nickel plating on the liquid contact parts improves corrosion resistance

Technical data from the manufacturer catalogue

Dimensions

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

Legend: L = overall length; D = socket outside diameter; T = thread or barb size

Models in this series HOT WATER CUPLA HW Type

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

Operating principle

• Employs sealing material with excellent heat resistance.
• Separation prevention mechanism prevents accidental disconnection caused by vibration or impact.
• Nickel plated on the liquid contact parts to improve corrosion resistance.
• The socket has double O-ring for improved seal.

Series comparison

Pick HOT WATER CUPLA HW Type over MOLD CUPLA when the temperature control circuit carries hot water up to +180 deg C or works above 1.0 MPa {10 kgf/cm2}: the HW Type is rated for 2.0 MPa {20 kgf/cm2} and its FKM seal covers -20 deg C to +180 deg C. It is also the choice where the line has to close on both sides, since the HW Type is two-way shut-off while MOLD CUPLA shuts off on the socket side only. Where a straight through connection without a socket valve is wanted, MOLD CUPLA is the series that offers it.

Body and seal materials

Applications

• Temperature control circuits on injection moulds for plastic parts
• Hot water lines on temperature control units
• Steam lines on temperature control equipment
• Fast disconnection and reconnection of temperature control hoses during a mould change
• Test rigs and machinery running water up to +180 °C

Compatibility

The approved fluids are water and steam. For any other fluid the suitability of the seal and of the body material has to be checked before use.

Standards and compliance

End sizes run from Rc 1/4 and R 1/4 up to Rc 1/2 and R 1/2, the products comply with the RoHS Directive, and the Nitto Kohki Couplings Division is certified to ISO 9001 and ISO 14001.

Safety and application notes

• On installation or removal always use correct size spanner / wrench on the hexagon section of socket/plug body.
• Hot water continuous flow test by a mold temperation controller. Valve: For continuous use of 3000 hours at 160 deg C / 1000 hours at 180 deg C. O-ring: For continuous use of 2000 hours at 160 deg C / 700 hours at 180 deg C.
• Although we have confirmed that there is no leakage, it is our experimental value and not a guaranteed value. Please consider above hours just as a guide. The durability of the seal differs depending on the customers usage conditions. Number of connection / disconnection, fluid additives, etc.
• Air will be admixed at the time of connection. Please purge the air by the equipment side when using with hot water.
• If additives are mixed in water or the piping is filled with steam, the lifetime of the seal will be decreased. When using in such an environment, conduct performance evaluation test by actual product.
• 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 87. The complete catalogue is available for download on this page.