Quick connect coupling Zero Spill Cupla ZEL-6S, stainless steel - Nitto Kohki 345522061

Every disconnection of a fluid line leaves residue in the coupling and lets air into the circuit on reconnection. The Nitto Kohki Zerospill Cupla shuts off on both the socket and the plug side and keeps spillage between 0.06 and 0.55 mL per disconnection at a working pressure of up to 3.5 MPa.

• Valves in both socket and plug close automatically on disconnection. Spillage stays between 0.06 mL (ZEL-2SP) and 0.55 mL (ZEL-8SP) depending on size.
• Air admixture on connection is limited to 0.16 mL up to 1.52 mL, which keeps cooling and hydraulic circuits free of entrained air.
• Working pressure of 3.5 MPa (35 bar, 508 PSI) for water, hydraulic oil, air, gas and chemicals.
• Three seal materials cover different temperature windows: NBR from -20 to +80 degrees Celsius, FKM from -20 to +180 degrees Celsius, EPDM from -40 to +150 degrees Celsius.
• Bodies in brass or stainless steel SUS 304, in five port sizes from R 1/4 to R 1.
• The low friction valve movement and the push to connect design shorten connection time and reduce wear on the valve parts.

Technical data from the manufacturer catalogue

Dimensions

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

Legend: L = overall length; T = thread or barb size

Models in this series ZEROSPILL CUPLA

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

Operating principle

• Unique seal design reduces both liquid spillage and air ingress.
• New valve design offers smooth zero-friction movement, resulting in reduced chance of malfunction caused by deterioration of valve parts.
• Push to connect design: just push the plug into the socket for simple and secure connection, which reduces connection time and improves efficiency.
• One-hand easy operation.
• A variety of body materials and sizes have been standardized to support a wide range of applications and situations.
• Automatic shut-off valves in both socket and plug prevent fluid spill out on disconnection.
• Volume of spillage about 96 percent less compared with SP CUPLA Type A.
• Volume of air ingress about 94 percent less compared with SP CUPLA Type A.

Series comparison

Pick ZEROSPILL CUPLA when disconnection must not spill: it shuts off on both sides with spill reduction, and the catalogue figures put its spillage about 96 percent and its air ingress about 94 percent below SP CUPLA Type A, the two-way shut-off sibling in the same category. Its working pressure stops at 3.5 MPa {35 kgf/cm2}, so lines that go up to the 7.5 MPa {76 kgf/cm2} of TSP CUPLA or SP CUPLA Type A are outside its range. TSP CUPLA is straight through and TSP CUPLA Socket with Ball Valve shuts off on one side only at 1.0 MPa {10 kgf/cm2}, so neither of them holds the fluid back in both halves the way this series does.

Body and seal materials

Applications

• Closed water cooling circuits on machine tools and test rigs
• Hydraulic oil lines operating at up to 3.5 MPa
• Chemical lines where drip loss at the coupling point has to be avoided
• Gas and compressed air lines with frequently exchanged consumers
• Vacuum service down to 1.3 x 10-1 Pa in the connected state

Compatibility

Once connected, fluid can flow in either direction, from the plug side or from the socket side. Sockets and plugs of different sizes cannot be connected to each other, so size always mates with matching size.

Standards and compliance

The stainless steel version is made of SUS 304 and all ports are female threads from Rc 1/4 to Rc 1.

Safety and application notes

• 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 89. The complete catalogue is available for download on this page.