Quick couplings

Lock Cupla 200

The Nitto Kohki Lock Cupla 200 is a quick-release coupling in steel with NBR seals, secured with an additional locking ring against unintentional disconnection. The range covers socket types only (L200-xS) in nominal sizes 20, 30, and 40, with connection options G external thread (H), metric (M), and G internal thread (F). The lock mechanism prevents vibration or accidental contact from releasing the connection without a deliberate two-step unlocking action.

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Buying guide

How to choose Lock Cupla 200

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

Technical features

✓ Locking ring - Two-step unlocking prevents unintentional disconnection by vibration or contact

⚙ Steel with NBR - Steel socket body, NBR seals for compressed air and general industrial gases

↕ Nominal sizes 20, 30, 40 - Three size steps matched to different flow rates

⬡ Connections H, M, F - G external, metric, and G internal for flexible line connection

Type overview

Type	Nominal size	Connection	Material	Seal
L200-20SH	20	G external	Steel	NBR
L200-30SH	30	G external	Steel	NBR
L200-40SH	40	G external	Steel	NBR
L200-20SM	20	Metric	Steel	NBR
L200-30SM	30	Metric	Steel	NBR
L200-40SM	40	Metric	Steel	NBR
L200-20SF	20	G internal	Steel	NBR
L200-30SF	30	G internal	Steel	NBR
L200-40SF	40	G internal	Steel	NBR

Typical applications

Typical applications: Compressed-air connections on vibrating machines and vehicles, compressor installations subject to vibration and impact, hose connections on construction sites and outdoor installations, and pneumatic systems where a safeguard against unintentional disconnection by operators or machine contact is required.

FAQ

Frequently asked questions about Lock Cupla 200

What are Nitto Kohki Lock Cupla 200 quick couplings and what industrial applications do they serve?

The Nitto Kohki Lock Cupla 200 series represents steel-bodied pneumatic quick couplings with NBR sealing designed for rapid hose line connection and disconnection in industrial automation systems. These couplings serve manufacturing applications including assembly line pneumatics, machine tool air supply, compressed air distribution networks, and automated production equipment where reliable leak-free connections are critical. The Lock Cupla 200 design ensures instant coupling engagement with audible lock confirmation, making them essential components in automotive manufacturing, packaging machinery, and industrial robotics where operators require fast tool changes and secure air line connections.

What are the key technical selection criteria for Lock Cupla 200 pneumatic quick couplings?

Lock Cupla 200 selection depends on port size compatibility with available variants including 20mm, 30mm, and 40mm nominal diameters across the L200-20SF through L200-40SM model range. The steel construction with NBR sealing provides durability for industrial compressed air systems operating at standard pneumatic pressures, while the suffix designation indicates connection type with SF denoting socket female, SM socket male, and SH socket configurations. Critical selection factors include thread compatibility with existing system fittings, required flow capacity matching the pneumatic tool or actuator demand, and environmental conditions affecting the NBR seal material performance in the specific application temperature range.

Which international standards and certifications apply to Lock Cupla 200 pneumatic couplings?

Lock Cupla 200 pneumatic quick couplings conform to ISO 4414 pneumatic system safety requirements and ISO 5682 standards for pneumatic quick-action couplings ensuring interoperability and performance consistency. The steel construction and NBR sealing materials comply with relevant DIN EN standards for compressed air applications, while the coupling design meets industrial safety requirements for positive engagement mechanisms. Nitto Kohki manufacturing processes adhere to ISO 9001 quality management standards, ensuring consistent dimensional accuracy and sealing performance across the Lock Cupla 200 product range for critical industrial pneumatic applications.

What are the differences between Lock Cupla 200 model variants L200-SF, L200-SM, and L200-SH?

The Lock Cupla 200 model designation system differentiates connection types where SF indicates socket female threading, SM designates socket male threading, and SH represents socket configurations for specific mounting requirements. Available in 20mm, 30mm, and 40mm port sizes across all connection types, the L200-20SF through L200-40SH range provides comprehensive system integration options for different pneumatic line configurations. All variants feature identical steel body construction with NBR sealing technology, maintaining consistent performance characteristics while accommodating various installation geometries and existing pneumatic system thread standards in industrial applications.

What installation requirements and system compatibility considerations apply to Lock Cupla 200 couplings?

Lock Cupla 200 installation requires proper thread engagement with adequate sealing compound application on threaded connections to prevent air leakage in compressed air systems. The steel construction ensures compatibility with standard pneumatic system pressures while NBR sealing material provides reliable operation with clean, dry compressed air and compatible pneumatic fluids. System integration demands consideration of coupling orientation for operator access, adequate clearance for engagement and disengagement operations, and proper support for connected hose assemblies to prevent stress on the coupling body. The positive locking mechanism requires clear audible confirmation of engagement before system pressurization.

What safety ratings and operating specifications define Lock Cupla 200 performance parameters?

Lock Cupla 200 pneumatic couplings operate within standard industrial compressed air pressure ranges with steel body construction providing mechanical strength for demanding industrial applications. The NBR sealing material maintains integrity across typical pneumatic system temperature ranges from -10°C to +60°C while ensuring leak-free operation under cyclic pressure loading conditions. Safety features include positive mechanical locking that prevents accidental disconnection under system pressure and visual confirmation of proper engagement status. The robust steel construction provides extended service life under continuous industrial use with resistance to mechanical damage and environmental contamination typical in manufacturing environments.

What maintenance schedule and service life expectations apply to Lock Cupla 200 quick couplings?

Lock Cupla 200 maintenance requires periodic inspection of NBR sealing surfaces for wear, contamination, or damage that could compromise pneumatic system integrity. Recommended inspection intervals include monthly visual checks for proper locking mechanism operation and semi-annual detailed examination of sealing surfaces and thread condition under normal industrial service. Service life expectancy exceeds 100,000 connection cycles when operated within specified pressure and temperature limits with clean, properly filtered compressed air. Critical maintenance indicators include difficulty in coupling engagement, visible seal degradation, or air leakage during pressure testing, requiring immediate coupling replacement to maintain system reliability and operator safety.