High-Pressure up to 700 Bar

S210 Cupla

The Nitto Kohki S210 Cupla is a high-pressure quick-release coupling in stainless steel (SUS) with FKM seals, rated for operating pressures up to 700 bar. The range includes plugs (S210-xP) and sockets (S210-xS) in nominal sizes 2, 3, 4, 6, and 8. The stainless steel construction differentiates the S210 Cupla from the steel-bodied 350 Cupla, making it suitable for corrosive media and applications with elevated hygiene requirements at the same pressure rating.

10 items
1 manufacturer
Net prices plus VAT

View as Grid view List view

Show

per page

Buying guide

How to choose S210 Cupla

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

Technical features

⚡ Up to 700 bar operating pressure - SUS stainless steel for high-pressure systems with corrosive media exposure

⬡ FKM seals - Resistant to mineral oils, synthetic hydraulic fluids, and elevated operating temperatures

↕ Nominal sizes 2-8 - Five size steps for varying volume flows in high-pressure lines

✓ Compatible plug/socket pairs - S210-xP and S210-xS form matched coupling pairs

S210 Cupla type overview

Type	Role	Nominal size	Material	Seal
S210-2P / S210-2S	Plug / Socket	2	SUS	FKM
S210-3P / S210-3S	Plug / Socket	3	SUS	FKM
S210-4P / S210-4S	Plug / Socket	4	SUS	FKM
S210-6P / S210-6S	Plug / Socket	6	SUS	FKM
S210-8P / S210-8S	Plug / Socket	8	SUS	FKM

Typical applications

Typical applications: High-pressure hydraulic systems with corrosive media (salt water, aggressive coolants), chemical high-pressure test rigs, offshore hydraulics and underwater applications, food and pharmaceutical processes at high pressure, and high-pressure cleaning systems where stainless steel combines corrosion resistance and food-grade compliance.

FAQ

Frequently asked questions about S210 Cupla

What are Nitto Kohki S210 Cupla high-pressure quick couplings and where are they used industrially?

Nitto Kohki S210 Cupla high-pressure quick couplings are precision-engineered stainless steel (SUS) pneumatic and hydraulic connectors designed for operating pressures up to 700 bar in demanding industrial environments. These couplings feature FKM (fluoroelastomer) sealing technology and are extensively used in hydraulic test systems, pneumatic tooling applications, injection molding machinery, and aerospace ground support equipment. The S210 series provides reliable fluid connection and disconnection under high pressure while maintaining zero leakage performance in automotive manufacturing, chemical processing, and industrial automation systems.

How do I select the correct S210 Cupla coupling based on port size and connection type?

S210 Cupla coupling selection depends on your system's port size requirements, with available sizes including 2mm, 3mm, 4mm, 6mm, and 8mm configurations to match specific flow rate demands. The coupling designation system uses 'S' suffix for socket (female) connections and 'P' suffix for plug (male) connections, allowing proper mating pair selection for your hydraulic or pneumatic circuit. All variants feature identical 700 bar pressure rating and SUS stainless steel construction with FKM seals, ensuring consistent performance across different port sizes while maintaining chemical compatibility with hydraulic oils, compressed air, and inert gases.

What international standards and certifications apply to Nitto Kohki S210 Cupla high-pressure couplings?

Nitto Kohki S210 Cupla couplings are manufactured to comply with ISO 4414 pneumatic system safety standards and ISO 4413 hydraulic system requirements for high-pressure applications up to 700 bar. The stainless steel construction meets DIN 1.4404 material specifications while FKM sealing compounds conform to DIN 53505 Shore A hardness standards for chemical resistance. These couplings also satisfy ISO 5675 quick coupling performance criteria and maintain compliance with pressure equipment directive 2014/68/EU for safe operation in European industrial installations requiring reliable high-pressure fluid connections.

What are the differences between S210-S socket and S210-P plug variants in the coupling system?

S210-S socket couplings feature internal valve mechanisms and female threaded connections that receive the male plug components, while S210-P plug variants incorporate external valve systems with male threaded connections for system integration. Both socket and plug variants share identical 700 bar pressure ratings, SUS stainless steel construction, and FKM sealing technology, but differ in their connection orientation and internal flow path design. The socket variants (S210-2S through S210-8S) typically mount permanently to equipment manifolds, while plug variants (S210-2P through S210-8P) attach to flexible hoses or portable tooling for quick connection and disconnection under operating pressure.

What installation requirements and system compatibility considerations apply to S210 Cupla couplings?

S210 Cupla couplings require proper thread engagement torque according to port size specifications and must be installed with compatible thread sealant rated for 700 bar operating pressure to prevent leakage. The stainless steel construction provides broad media compatibility including hydraulic oils ISO VG 32-68, compressed air per ISO 8573 quality class, and inert gases, while FKM seals resist petroleum-based fluids and synthetic lubricants up to 200°C. Installation systems must incorporate pressure relief valves and proper filtration upstream of couplings, with thread connections requiring 1.5 times working pressure proof testing before commissioning in high-pressure pneumatic and hydraulic circuits.

What safety ratings and operating temperature range specifications apply to S210 Cupla high-pressure couplings?

S210 Cupla couplings operate safely at maximum working pressures up to 700 bar with a 4:1 safety factor, providing burst pressure resistance exceeding 2800 bar under standard test conditions. The operating temperature range spans -20°C to +150°C for standard applications, with FKM sealing compounds maintaining elasticity and chemical resistance throughout this temperature spectrum. These couplings meet IP65 protection rating when properly mated, preventing ingress of dust and water jets during industrial cleaning operations while maintaining pressure integrity in harsh manufacturing environments requiring frequent coupling and decoupling under load.

What maintenance schedule and service life expectations apply to Nitto Kohki S210 Cupla couplings?

S210 Cupla couplings require quarterly visual inspection of sealing surfaces and annual replacement of FKM seals in continuous high-pressure service above 500 bar operating pressure. The stainless steel coupling bodies provide service life exceeding 100,000 connection cycles when operated within rated pressure and temperature limits, with seal replacement intervals extending to 24 months in intermittent duty applications. Preventive maintenance includes monthly cleaning of coupling faces with isopropyl alcohol, torque verification of threaded connections every 6 months, and immediate replacement of any coupling showing visible wear, corrosion, or pressure drop during system leak testing procedures.