Pneumatics

Nitto Kohki Pneumatic Solutions

Nitto Kohki is a Japanese manufacturer specialising in quick coupling and multi-coupling systems for compressed air, hydraulics, vacuum and specialty gases. The product programme spans low-pressure couplings for standard compressed air networks, high-pressure couplings up to 700 bar, cleanroom couplings for semiconductor manufacturing, and special designs for paint and coating systems. The range is complemented by pneumatic tools, pumps and compressors.

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Buying guide

How to choose Nitto Kohki Pneumatic Solutions

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

Technical Features - Nitto Kohki Coupling Systems

⚙ Pressure classes 0 to 700 bar - low, medium and high-pressure couplings from one programme

✓ Media versatility - compressed air, hydraulic oil, vacuum, noble gases, paints, cooling media

⚡ Flat-face and full-bore types - leak-free disconnection and unrestricted flow as required

↕ Multi Cupla - simultaneous coupling of multiple lines for fast tool changeover

✦ Cleanroom and semiconductor specialisation - Semicon Cupla for contamination-free applications

Range by Pressure Class and Medium

Area	Pressure class	Typical couplings
Low pressure	up to 19 bar	HI Cupla, Micro Cupla, Full Blow Cupla, FF Cupla
Medium pressure	up to 75 bar	TSP Cupla and related high-flow types
High pressure	up to 700 bar	HSP Cupla hydraulic quick couplings
Cleanroom / noble gas	as required	Semicon Cupla SP Type, purge types
Mould making	tempering media	Hot Water Cupla and cooling water connections
Multi-line	by type	Multi Cupla MAM, MALC, MALS/MALT

Typical Applications

Typical applications: Industrial compressed air distribution and tool supply, hydraulic systems and test rigs with high-pressure requirements, semiconductor and electronics industries (Semicon Cupla, purge types), injection mould tooling and temperature control in mould making, paint and coating systems, and special machines and laboratory installations where pressure lines must be frequently reconnected.

FAQ

Frequently asked questions about Nitto Kohki Pneumatic Solutions

What are Nitto Kohki pneumatic components and their primary industrial applications?

Nitto Kohki pneumatic components are precision-engineered quick disconnect couplings and pneumatic fittings designed for high-performance industrial fluid handling systems. These components serve critical applications in semiconductor manufacturing, pharmaceutical processing, food and beverage production, and general automation where contamination-free media transfer is essential. The product range includes specialized Semicon SCT Cupla series with PTFE and FEP materials for ultra-clean environments, Multi Cupla series with brass bodies and FKM seals for general industrial use, and SP Cupla variants featuring SUS304 stainless steel construction with Kalrez sealing for aggressive chemical compatibility.

What are the key technical selection criteria for Nitto Kohki pneumatic couplings?

Selection of Nitto Kohki pneumatic couplings depends on operating pressure range, media compatibility, and connection specifications. The Multi Cupla series handles medium pressure applications up to 75 bar with brass construction and FKM seals, while HI Cupla variants accommodate low pressure systems up to 19 bar. Port sizes range from 2mm to 12mm as evidenced by models like MAM-A-2S12 and MAM-A-4S12, with both metric and NPT threading options available. Material selection between PTFE/FEP for chemical resistance, brass for general purpose, or SUS304 stainless steel for pharmaceutical applications determines long-term reliability and contamination control.

Which international standards and certifications apply to Nitto Kohki pneumatic components?

Nitto Kohki pneumatic components comply with ISO 4414 for pneumatic fluid power systems and ISO 5675 for quick-action couplings dimensional requirements. The Semicon series meets semiconductor industry cleanliness standards including SEMI F57 for contamination control and ASTM F1058 for particle generation testing. Materials conform to FDA CFR 21.177.2600 for food contact applications where applicable, while the stainless steel SP Cupla series achieves USP Class VI biocompatibility certification for pharmaceutical processes. Thread specifications follow ISO 228 for parallel threads and ANSI B1.20.1 for NPT tapered connections to ensure global compatibility.

What are the main differences between Nitto Kohki Semicon SCT, Multi Cupla, and SP Cupla product variants?

The Semicon SCT Cupla series features PTFE and FEP construction for ultra-clean semiconductor and pharmaceutical applications requiring zero particle generation and chemical inertness. Multi Cupla variants utilize brass bodies with FKM sealing for general industrial pneumatics, offering superior durability and cost-effectiveness at medium pressures up to 75 bar. SP Cupla models employ SUS304 stainless steel construction with Kalrez high-performance elastomer seals, providing exceptional chemical resistance and temperature stability for aggressive media handling. Port configurations vary from 2mm to 12mm across all series, with both metric and NPT threading available to match existing system specifications.

What are the installation requirements and system compatibility specifications for Nitto Kohki pneumatic couplings?

Nitto Kohki pneumatic couplings require proper thread sealant application per ISO 4414 guidelines and torque specifications ranging from 15-25 Nm depending on port size and material construction. System compatibility extends across compressed air, inert gases, and process fluids with viscosities up to 100 cSt at operating temperature. Connection types include G1/8 to G1/2 parallel threads per ISO 228 and 1/8NPT to 1/2NPT tapered threads per ANSI B1.20.1, ensuring universal compatibility with existing pneumatic infrastructure. Installation clearance requirements specify minimum 50mm radial space for coupling engagement and 30mm axial space for disconnection under full system pressure.

What are the safety ratings and operating specifications for Nitto Kohki pneumatic components?

Nitto Kohki pneumatic components achieve IP65 ingress protection rating for dust-tight and water-resistant operation in harsh industrial environments. Operating temperature range spans -20°C to +150°C for brass Multi Cupla series and -40°C to +200°C for stainless steel SP Cupla variants, with pressure ratings from 19 bar for low-pressure HI Cupla to 75 bar for medium-pressure Multi Cupla systems. The Semicon SCT series operates within -10°C to +120°C with specialized PTFE and FEP materials maintaining dimensional stability and leak-tight performance at pressures up to 10 bar. All coupling variants incorporate automatic shut-off valves to prevent fluid loss during disconnection under pressure.

What maintenance schedules and service life expectations apply to Nitto Kohki pneumatic couplings?

Nitto Kohki pneumatic couplings require quarterly visual inspection for seal integrity and annual replacement of elastomer components in high-cycle applications exceeding 10,000 connect/disconnect operations per year. Service life typically reaches 50,000 to 100,000 coupling cycles depending on media compatibility and operating pressure, with PTFE and FEP Semicon series achieving extended intervals due to chemical inertness. Preventive maintenance includes semi-annual cleaning with appropriate solvents, torque verification of threaded connections per ISO 4414, and replacement of FKM or Kalrez seals based on hardness testing using Shore A durometer readings. Complete coupling replacement becomes necessary when automatic shut-off valve response time exceeds 0.5 seconds or leakage rate surpasses 10ml/min at maximum operating pressure.