Nitto Kohki Pneumatic Solutions

Low pressure up to 19 bar

Nitto Kohki low-pressure quick couplings up to 19 bar cover the most common operating pressure range of industrial compressed air systems. The series in this group range from micro couplings for small tube diameters through compact and cube-shaped designs to high-flow types (HI Cupla) and full-bore blow-off versions (Full Blow Cupla). All types connect plug and socket by simple push-in action and release by retracting the sleeve.

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How to choose Low pressure up to 19 bar

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

Technical Features

⚙ Operating pressure up to 19 bar - matched to industrial compressed air networks in the 10-19 bar range

✓ Push-in / pull-to-release - coupling by simple push-in, disconnection by retracting the sleeve

⚡ Wide size spectrum - from micro connections to large hose cross-sections

↕ Special functions by type - full-flow bore (Full Blow), inline (Line), lever locking (Lever Lock)

Selection by Application

For confined installation spaces, Micro Cupla, Small Cupla and Compact Cupla offer small dimensions. High-flow applications call for HI Cupla, Super Cupla or Full Blow Cupla. Lever Lock Cupla prevents accidental disconnection under vibration. Cube Cupla simplifies hose attachment through its cuboid body. For inline connections along a hose run without a side branch, Line Cupla is the appropriate choice.

Typical Applications

Typical applications: Compressed air supply for pneumatic tools and machines in the up-to-19-bar range, flexible hose distribution systems in manufacturing, frequently changed compressed air connections at assembly stations and service points, and blow-off tool supplies where low coupling pressure drop maintains system efficiency.

FAQ

Frequently asked questions about Low pressure up to 19 bar

What are Nitto Kohki low-pressure pneumatic components up to 19 bar used for in industrial applications?

Nitto Kohki low-pressure pneumatic components operating up to 19 bar maximum pressure are specialized quick-disconnect couplings designed for precision pneumatic systems in manufacturing automation, food processing, pharmaceutical production, and clean room environments. These Lever Lock Cupla series components provide reliable air and inert gas connections in applications requiring frequent coupling and decoupling operations without pressure loss. The stainless steel construction and NBR sealing materials make them particularly suitable for hygienic applications and corrosive environments where standard brass or steel fittings would degrade over time.

What are the key technical selection criteria for Nitto Kohki pneumatic quick couplings rated to 19 bar?

Critical selection parameters for Nitto Kohki pneumatic quick couplings include port size ranging from 20mm to 32mm internal diameter, material construction with options including SUS stainless steel and AL aluminum alloy bodies, and seal compatibility with NBR rubber providing chemical resistance to standard pneumatic media. The coupling mechanism features lever-lock operation requiring minimal insertion force while maintaining 19 bar maximum working pressure throughout the connection cycle. Temperature compatibility extends from -20°C to +150°C depending on seal material selection, with flow coefficient values optimized for minimal pressure drop across the coupling interface.

Which ISO and DIN standards apply to Nitto Kohki low-pressure pneumatic quick couplings?

Nitto Kohki pneumatic quick couplings conform to ISO 4414 pneumatic fluid power systems standard for maximum working pressure verification and safety requirements up to 19 bar operating pressure. Material specifications follow DIN EN 10088 for stainless steel corrosion resistance classification and DIN 53505 for elastomer hardness testing of NBR seal components. The lever-lock mechanism design adheres to ISO 7241-1 Series A quick-acting couplings dimensional standards ensuring interchangeability with other manufacturers' compatible coupling systems in industrial pneumatic networks.

What are the differences between Nitto Kohki LB, LC, LD, LE, and LF series pneumatic coupling variants?

The Nitto Kohki Lever Lock Cupla series differentiates by connection configuration and flow direction with LB-series providing male threaded connections, LC-series featuring hosetail configurations for flexible tubing attachment, and LD-series offering female threaded ports for equipment mounting. LE and LF variants incorporate different internal valve mechanisms with LE-series using poppet valve technology for bi-directional flow control while LF-series utilizes flat-face sealing for minimal dead volume applications. Port sizes span 20mm, 24mm, and 32mm internal diameters across all series with consistent 19 bar maximum working pressure rating regardless of configuration type.

What installation requirements and connection types are needed for Nitto Kohki 19 bar pneumatic couplings?

Nitto Kohki pneumatic couplings require NPT or BSPT threaded connections matching the equipment port specifications with thread sealant rated for 19 bar pressure service and pneumatic media compatibility. Installation torque specifications range from 25 to 45 Nm depending on coupling size and thread pitch to prevent over-tightening damage to the stainless steel or aluminum housing. The lever-lock mechanism demands minimum 15mm clearance radially around the coupling body for proper operation and a straight-line insertion path of at least 30mm length to engage the internal locking mechanism without binding or premature wear.

What safety ratings and operating temperature ranges apply to Nitto Kohki pneumatic couplings rated for 19 bar?

Nitto Kohki pneumatic quick couplings maintain 19 bar maximum working pressure rating with 4:1 safety factor providing 76 bar burst pressure capability when tested according to ISO 4414 pneumatic safety standards. Operating temperature range spans -20°C to +150°C for stainless steel body construction with NBR seals, while aluminum variants operate reliably from -10°C to +120°C under continuous duty cycles. The IP65 ingress protection rating protects internal valve mechanisms from dust and water spray contamination common in industrial manufacturing environments, ensuring consistent sealing performance throughout the specified pressure and temperature operating envelope.

What maintenance intervals and service life expectations apply to Nitto Kohki 19 bar pneumatic quick couplings?

Nitto Kohki pneumatic quick couplings require visual inspection every 6 months for seal integrity and lever mechanism wear with complete disassembly and seal replacement recommended at 100,000 coupling cycles or 24 months of continuous operation under 19 bar working pressure. Service life typically exceeds 500,000 connection cycles when operated within specified pressure and temperature limits using filtered compressed air meeting ISO 8573-1 Class 7.4.4 purity standards. Critical wear points include the NBR O-ring seals which should be replaced immediately upon detecting air leakage exceeding 10 ml/min at maximum working pressure during routine leak testing procedures.