Overview

This document provides detailed specifications, design features, and application guidelines for Nitto Kohki's Cube Cupla quick connect couplings used in air and water piping systems. The couplings are designed for easy push-to-connect operation, lightweight construction, and come in multiple colors to prevent piping errors.

Product Types and Models

• SH Type (Hose Barb): Available with 4 mm and 6 mm inner diameter (ID) tubes, with or without built-in valves. Models include SPC-04SH, SPC-06SH, and valveless variants ending with -VL.
• PH Type (Hose Barb Socket): Models SPC-04PH and SPC-06PH, with or without valves.
• PHB Type (Panel Mount Plug): Designed for panel mounting, available in 4 mm and 6 mm ID tubes.
• PHL Type (Hose Barb Plug): Similar to PH type but as plugs.
• PM Type (Male Thread): Threaded plugs with R 1/8 size.
• SM Type (Male Thread Socket): Threaded sockets with Rc 1/8 size.
• L Type Plug: Newly added for narrow space piping, available in five colors.

Material and Compliance

• Main body made of polyacetal resin (POM), conforming to Japan's Food Sanitation Act and passing material and elution tests.
• O-rings made of nitrile rubber (NBR), also compliant with food safety standards.
• Silicone type grease (NSF H1, NSF 61 registered) applied to sealing materials.
• Products comply with RoHS Directive.

Specifications and Dimensions

• Working pressure up to 1.0 MPa (10 bar / 145 PSI).
• Working temperature range: -20°C to +60°C.
• Seal material: Nitrile rubber (NBR).
• Maximum tightening torque varies by model, typically 5 to 8.6 N•m.
• Dimensions provided for length, width across flats (WAF), diameter of mounting holes, and other critical parameters for installation.
• Mass ranges from approximately 1.5 g to 7 g depending on model and size.

Functional Features

• Push-to-connect operation with easy disconnection via push buttons.
• Two-way shut-off valves in sockets and one-way shut-off valves in plugs, depending on model.
• Fluid flow is bi-directional when socket and plug are connected.
• Valveless types (-VL) available; however, valveless plugs cannot open built-in valve sockets.
• Compatibility across models for plug and socket connections, with some limitations regarding valve presence.

Color Coding and Application

• Available in five colors (Blue, Yellow, Pink, Green, Ivory) to prevent piping mistakes and facilitate identification.
• Color codes appended as suffixes to model names (e.g., -BLU for Blue).
• Recommended for air piping in office automation, measuring and analyzing equipment, muscle compression machines, inkjet printer cooling water, and other applications requiring reliable quick connect couplings.

Safety and Usage Recommendations

• Users must consult the general Quick Connect Couplings Catalog for additional safety guidelines and precautions.
• Material suitability should be evaluated before use in sanitation-controlled applications.
• Panel thickness for mounting plugs should not exceed 5 mm.
• Continuous use should not exceed the specified working pressure to avoid leakage or damage.

Performance Data

• Flow rate characteristics tested with air at room temperature show consistent performance across colors.
• Vacuum suitability up to 53.0 kPa (400 mmHg).

Summary

The Cube Cupla series offers a versatile, lightweight, and easy-to-use quick connect coupling solution for air and water piping systems. With multiple sizes, valve options, and color-coded models, these couplings enhance safety, prevent misconnection, and support a wide range of industrial applications. Compliance with food safety standards and RoHS directives further broadens their usability in sensitive environments.