Low pressure up to 19 bar

Cube Cupla

The Nitto Kohki Cube Cupla is a low-pressure quick-release coupling in POM (polyoxymethylene) with NBR seals, developed for low-pressure applications up to 19 bar. The extensive range of over 100 types divides into standard versions (SPC-04SH to SPC-10SM), extended versions (SPC-04PHB, SPC-06PHB), closed variants (SPC-04SH-VL to SPC-10SM-VL), and 90-degree angle versions (SPC-04PHL, SPC-06PHL). Plugs (P-types) and sockets (S-types) are available in nominal sizes 04, 06, and 10.

100 items
1 manufacturer
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Buying guide

How to choose Cube Cupla

What matters when choosing: properties, comparison and typical applications.

Technical features

⬡ POM body - Lightweight plastic, chemically resistant to oils, petrol, and mild solvents; low weight for mobile applications

⚙ Extensive type variety - Standard, angle (PHL), extended (PHB), and locked (VL) versions within one system

↕ Nominal sizes 04, 06, 10 - Three steps for different hose diameters and flow rates

✓ VL locking - SPC-xxxx-VL variants with additional safeguard against unintentional disconnection

Version overview

Version	Type examples	Material	Feature
Standard	SPC-04SH, SPC-06SH, SPC-10SM, SPC-04PH, SPC-06PH, SPC-10PM	POM/NBR	Basic plug and socket
90-degree angle	SPC-04PHL, SPC-06PHL	POM/NBR	Angled plug outlet
Extended	SPC-04PHB, SPC-06PHB	POM/NBR	Extended plug outlet
Locked (VL)	SPC-04SH-VL, SPC-06SH-VL, SPC-04PH-VL, SPC-06PH-VL	POM/NBR	Lock against disconnection

Typical applications

Typical applications: Pneumatics in electronics and semiconductor manufacturing (POM for clean environments), hose connections on robot arms and handling systems, low-pressure air tool connections, laboratory automation and medical technology, and portable pneumatic equipment where low weight and compact size are required.

FAQ

Frequently asked questions about Cube Cupla

What are Cube Cupla pneumatic couplings and which industrial applications use them?

Cube Cupla pneumatic couplings from Nitto Kohki are low-pressure quick-connect fittings designed for reliable fluid connections in pneumatic systems operating up to 19 bar. These POM body couplings with NBR seals serve manufacturing automation, packaging machinery, pneumatic tool connections, and compressed air distribution networks. Their cube-shaped design provides secure mechanical engagement while enabling rapid connection and disconnection cycles essential in production environments where frequent tool changes or system reconfiguration occurs.

What technical specifications should engineers consider when selecting Cube Cupla pneumatic couplings?

Selection of Cube Cupla couplings requires evaluation of maximum operating pressure up to 19 bar, port sizes including SPC-04SH (4mm), SPC-06SH (6mm), and SPC-10SM (10mm) variants, and media compatibility with compressed air and neutral gases. The POM (polyoxymethylene) body material provides excellent dimensional stability and chemical resistance, while NBR (nitrile butadiene rubber) sealing elements ensure reliable sealing across temperature ranges. Flow capacity, connection frequency, and valve configuration with standard or VL (valve-less) options determine optimal coupling selection for specific pneumatic circuit requirements.

Which international standards and certifications apply to Cube Cupla pneumatic couplings?

Cube Cupla pneumatic couplings comply with ISO 4414 standards for pneumatic fluid power systems and general safety requirements for compressed air applications. The couplings meet material specifications under ISO 1043 for POM thermoplastic identification and performance criteria defined in ISO 5676 for pneumatic quick-action couplings. Manufacturing quality follows ISO 9001 standards while dimensional tolerances adhere to ISO 286 precision requirements, ensuring reliable interchangeability and consistent performance across industrial pneumatic installations.

What are the differences between standard Cube Cupla variants and VL models?

Standard Cube Cupla models like SPC-04SH, SPC-06SH, and SPC-10SM incorporate automatic shut-off valves that close when disconnected, preventing air loss and maintaining system pressure. The VL variants such as SPC-04SH-VL, SPC-06SH-VL, and SPC-10SM-VL feature valve-less designs that allow free flow when connected but do not provide automatic sealing upon disconnection. Valve-less models reduce pressure drop across the coupling connection but require manual system isolation before disconnection, making them suitable for applications where minimal flow restriction outweighs automatic shut-off functionality.

What installation requirements and system compatibility considerations apply to Cube Cupla couplings?

Cube Cupla couplings require threaded connections compatible with standard pneumatic fittings and sufficient clearance for manual engagement and disengagement operations. Installation demands proper thread sealing using PTFE tape or anaerobic sealants to achieve rated pressure capability up to 19 bar, with mounting orientation allowing unrestricted access for coupling operation. System compatibility extends to compressed air, nitrogen, and inert gases with operating temperatures typically ranging from -10°C to +60°C, while avoiding aggressive chemicals that could degrade POM body materials or NBR sealing elements.

What safety ratings and environmental specifications do Cube Cupla pneumatic couplings meet?

Cube Cupla couplings operate safely at maximum working pressures up to 19 bar with proof pressure testing typically performed at 1.5 times working pressure according to pneumatic component standards. The POM body construction withstands ambient temperatures from -10°C to +60°C while maintaining dimensional stability and sealing integrity throughout thermal cycling. These couplings achieve IP40 protection rating against solid particle ingress when properly mated, though they lack specific ATEX certification for explosive atmosphere applications without additional documentation from the manufacturer.

What maintenance schedule and service life expectations apply to Cube Cupla pneumatic couplings?

Cube Cupla couplings typically require visual inspection every 6 months for seal integrity, body wear, and proper engagement mechanism function, with NBR seals showing service life of 2-5 years depending on operating pressure, temperature, and connection frequency. Preventive maintenance involves checking for air leakage at 19 bar test pressure, verifying smooth coupling operation without binding, and replacing units showing visible wear or seal degradation. High-cycle applications exceeding 10,000 connect-disconnect operations annually may require more frequent inspection intervals, while continuous pressurization accelerates seal aging compared to intermittent duty cycles.