Can the Quick Coupling Socket with BSPT Valve, NITTO KOHKI HI CUPLA, Stainless Steel AISI 304 handle 15 bar and temperatures from -20°C to +80°C reliably?

Yes. The Quick Coupling Socket with BSPT Valve, NITTO KOHKI HI CUPLA, Stainless Steel AISI 304 is specified for reliable operation up to 15 bar and across the temperature range -20°C to +80°C. Made from AISI 304 stainless steel with robust NBR seals, it is engineered for demanding pneumatic use, offering high vibration resistance, secure leak‑free connections and specified flow capacities (4000 l/min at 1", 3200 l/min at 3/4", 2600 l/min at 1/2", 1600 l/min at 3/8", 1000 l/min at 1/4" at 5 bar). For correct and reliable performance, ensure the medium always flows from the socket to the plug as recommended.

Does the Quick Coupling Socket with BSPT Valve, NITTO KOHKI HI CUPLA, Stainless Steel AISI 304 require a specific flow direction (socket to plug) to avoid leaks and ensure longevity?

Yes. The Quick Coupling Socket with BSPT Valve, NITTO KOHKI HI CUPLA, Stainless Steel AISI 304 requires the medium to flow from the socket to the plug. Correct flow direction prevents leaks, ensures the internal BSPT valve operates as designed, preserves the NBR sealing integrity, and maximizes service life and vibration resistance. Incorrect flow direction can compromise sealing, increase wear, and reduce reliability under working pressures up to 15 bar and the specified temperature range. Always install and operate with flow from socket → plug for optimal performance.

Quick Coupling Socket with BSPT Valve, NITTO KOHKI HI CUPLA, Stainless Steel AISI 304

All products, General-purpose low-pressure quick couplings/

Additional information

Material	SS – stainless steel

The Nitto Kohki HI CUPLA series socket with internal BSPT thread is a premium solution for demanding pneumatic applications, combining exceptional durability with outstanding resistance to vibration. Manufactured from high‑quality AISI 304 stainless steel, it ensures long‑lasting performance even in intensive industrial environments. Engineered for seamless connection of pneumatic tools to air supply systems, this coupling guarantees reliable operation under a working pressure of up to 15 bar and within a wide temperature range from -20°C to +80°C, supported by robust NBR sealing. Its impressive flow capacity delivers 4000 l/min at 1″, 3200 l/min at 3/4″, 2600 l/min at 1/2″, 1600 l/min at 3/8″, and 1000 l/min at 1/4″ at 5 bar, ensuring optimal efficiency across various tool sizes. Designed with precision, the HI CUPLA socket provides secure, leak‑free connections and smooth airflow, making it an ideal choice for industries where consistent performance and safety are paramount. For correct operation, the medium must always flow from the socket to the plug, guaranteeing maximum reliability and extending the service life of connected equipment.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
NK-20SF-SS	HI CUPLA quick coupling socket, BSPT 1/4" thread, AISI 304	-	15	In stock	Enquiry
NK-30SF-SS	HI CUPLA quick coupling socket, BSPT 3/8" thread, AISI 304	-	15	In stock	Enquiry
NK-400SF-SS	HI CUPLA quick coupling socket, BSPT 1/2" thread, AISI 304	-	15	In stock	Enquiry
NK-40SF-SS	HI CUPLA quick coupling socket, BSPT 1/2" thread, AISI 304	-	15	In stock	Enquiry
NK-600SF-SS	HI CUPLA quick coupling socket, BSPT 3/4" thread, AISI 304	-	15	In stock	Enquiry
NK-800SF-SS	HI CUPLA quick coupling socket, BSPT 1" thread, AISI 304	-	15	In stock	Enquiry

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The Nitto Kohki HI CUPLA series socket with internal BSPT thread is a premium solution for demanding pneumatic applications, combining exceptional durability with outstanding resistance to vibration. Manufactured from high‑quality AISI 304 stainless steel, it ensures long‑lasting performance even in intensive industrial environments. Engineered for seamless connection of pneumatic tools to air supply systems, this coupling guarantees reliable operation under a working pressure of up to 15 bar and within a wide temperature range from -20°C to +80°C, supported by robust NBR sealing. Its impressive flow capacity delivers 4000 l/min at 1″, 3200 l/min at 3/4″, 2600 l/min at 1/2″, 1600 l/min at 3/8″, and 1000 l/min at 1/4″ at 5 bar, ensuring optimal efficiency across various tool sizes. Designed with precision, the HI CUPLA socket provides secure, leak‑free connections and smooth airflow, making it an ideal choice for industries where consistent performance and safety are paramount. For correct operation, the medium must always flow from the socket to the plug, guaranteeing maximum reliability and extending the service life of connected equipment.