Quick connect coupling SP-V-A Cupla 3P-V-A, stainless steel - Nitto Kohki 459863879

When refrigerant circuits are evacuated and charged, an open line must neither draw in air nor lose fluid. SP-V-A Cupla carries an automatic shut-off valve in both socket and plug and stays vacuum tight down to 1.3 x 10-1 Pa even when disconnected.

• Two-way shut-off with an automatic valve in socket and plug, so both halves close by themselves on disconnection.
• Suitable for vacuum service down to 1.3 x 10-1 Pa (1 x 10-3 mmHg) even when disconnected, with a straight guide that stabilises valve movement.
• Working pressure of 3.0 to 7.5 MPa (31 to 76 kgf/cm2), with 1/4 and 3/8 inch reaching 7.5 MPa and 1/2 and 3/4 inch reaching 4.5 MPa.
• Three standard seal materials, CR for -20 to +80 °C, HNBR for -20 to +120 °C and FKM for -20 to +180 °C.
• HNBR resists HFC-134a, HFC-407C, HFC-410A and HFC-404A as well as PAG and ester type oils, while CR is aimed at HCFC-22 and HFC-134a.
• Low air admixture on connection, 1.0 mL on 2SP-V, 2.4 mL on 3SP-V, 3.2 mL on 4SP-V and 10.5 mL on 6SP-V.

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

Models in this series SP-V CUPLA Type A

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

Operating principle

• Uses automatic shut-off valves with ultra-tight sealed construction in both socket and plug. Ideal for vacuum applications.
• Having automatic shut-off valves in both socket and plug facilitates easy fluid handling. Suitable for a wide range of vacuum applications as high as 1.3x10-1 Pa {1x10-3 mmHg} even when disconnected.
• Three types of seal material are available to suit any of the diversified production lines for air conditioners, refrigerators or similar.
• Can be connected with SP CUPLA Type A and SP-V CUPLA.
• Double sealing structure improves airtightness (size 1/4 inch, 3/8 inch).
• Unique straight guide stabilizes valve movement.
• Both socket and plug have unique vacuum resistant automatic shut-off valves inside. The valve prevents fluid spill out on disconnection, and also has excellent vacuum resistance even after disconnection.
• Fluid flow can be bi-directional when socket and plug are connected.

Series comparison

Choose SP-V CUPLA Type A when the line has to be parted under vacuum or with inert gas inside: both halves carry vacuum resistant automatic shut-off valves and hold 1.3x10-1 Pa {1x10-3 mmHg} even when disconnected, whereas PCV PIPE CUPLA in the same group is valveless and leaves the line open on disconnection. Its working pressure of 3.0 to 7.5 MPa {31 to 76 kgf/cm2}, depending on body material and size, covers the 4.5 MPa {46 kgf/cm2} of that peer. Where no shut-off is required and the connection only has to pass fluid, the valveless PCV PIPE CUPLA remains the simpler choice.

Body and seal materials

Applications

• Air conditioner production lines with refrigerant charging
• Refrigerator and refrigeration equipment production lines
• Evacuating circuits before they are filled
• Inert gas, gas and compressed air lines
• Test and filling stations running water or air

Compatibility

Socket and plug must be of the same size, since different sizes cannot be connected. Connection to SP Cupla Type A is possible provided the resulting flow rate reduction is taken into account, and once coupled the fluid may flow from either the plug or the socket side.

Standards and compliance

Ends are supplied as R 1/4 to R 3/4 male threads and Rc 1/4 to Rc 3/4 female threads, maximum tightening torques run from 9 to 50 Nm on brass and from 14 to 90 Nm on stainless steel, and the seal materials are chloroprene rubber (CR), fluoro rubber (FKM) and hydrogenated nitrile rubber (HNBR).

Safety and application notes

• No grease is applied to the O-ring of the socket for HNBR seal material products when shipping. Be sure to apply refrigerating machine oil before use.
• 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 149. The complete catalogue is available for download on this page.