Is the Brass Quick Coupling Socket with BSPT Female Valve, NITTO KOHKI SP CUPLA Type A compatible with hydraulic oils and compressed air at 50 bar?

Yes. The Brass Quick Coupling Socket with BSPT Female Valve, NITTO KOHKI SP CUPLA Type A is compatible with hydraulic oils and compressed air at up to 50 bar for the smaller sizes (1/8", 1/4", 3/8"). Note pressure limits vary by size: 30 bar for 1/2", 3/4", 1"; 20 bar for 1 1/4" and 1 1/2"; and 15 bar for 2". Also confirm seal material suitability for your fluid and temperature range (NBR: -20°C to +80°C; Viton: -20°C to +180°C; EPDM: -40°C to +150°C).

Can the Brass Quick Coupling Socket with BSPT Female Valve, NITTO KOHKI SP CUPLA Type A be used with steam and chemicals at its maximum rated pressures?

Yes — the Brass Quick Coupling Socket with BSPT Female Valve, NITTO KOHKI SP CUPLA Type A can be used with steam and many chemicals, provided two conditions are met: 1. Operating pressure does not exceed the size-specific working pressure (50 bar for 1/8", 1/4", 3/8"; 30 bar for 1/2", 3/4", 1"; 20 bar for 1¼" and 1½"; 15 bar for 2"). 2. The seal material selected is compatible with the specific steam or chemical service and the operating temperature (NBR: -20°C to +80°C; Viton: -20°C to +180°C; EPDM: -40°C to +150°C). For steam service, choose a high-temperature seal (typically Viton if within its temp limit) and ensure pressure and temperature combined stay within the coupling’s ratings. For aggressive chemicals, verify chemical compatibility with the brass body and the chosen seal (Viton or EPDM may be preferable for many chemicals; NBR has more limited chemical and temperature resistance). If conditions approach limits or involve highly corrosive or oxidizing media, consult the manufacturer or perform a compatibility assessment before use.

Brass Quick Coupling Socket with BSPT Female Valve, NITTO KOHKI SP CUPLA Type A

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

Additional information

Material	B – brass (bronze)

The Nitto Kohki SP CUPLA Type A socket with integrated shut-off valve is a high-performance quick coupling solution designed for demanding industrial environments. Manufactured from robust brass, it ensures long-lasting durability and reliable operation even under intensive use. Its internal BSPT thread guarantees secure and leak-free connections, making it an excellent choice for applications involving water, hydraulic oils, steam, chemicals, compressed air, and various gases. With a working pressure capacity of up to 50 bar for smaller sizes (1/8″, 1/4″, 3/8″), 30 bar for medium sizes (1/2″, 3/4″, 1″), 20 bar for larger diameters (1.1/4″, 1.1/2″), and 15 bar for 2″, this coupling adapts seamlessly to diverse system requirements. The wide operating temperature range, depending on seal material—NBR from -20°C to +80°C, Viton from -20°C to +180°C, and EPDM from -40°C to +150°C—ensures versatility across multiple industries and working conditions. Engineered for efficiency, safety, and ease of use, the SP CUPLA Type A socket is the ideal solution for professionals seeking a reliable connection system that enhances performance, minimizes downtime, and delivers consistent results in both standard and extreme operating environments.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
NK-10S-A-B	SP-A CUPLA quick coupling socket, BSPT 1.1/4" thread, brass	-	20	In stock	Enquiry
NK-12S-A-B	SP-A CUPLA quick coupling socket, BSPT 1.1/2" thread, brass	-	20	In stock	Enquiry
NK-16S-A-B	SP-A CUPLA quick coupling socket, 2" BSPT thread, brass	-	15	In stock	Enquiry
NK-1S-A-B	SP-A CUPLA quick coupling socket, BSPT 1/8" thread, brass	-	50	In stock	Enquiry
NK-2S-A-B	SP-A CUPLA quick coupling socket, BSPT 1/4" thread, brass	-	50	In stock	Enquiry
NK-2S-A-B-V	Quick coupling socket SP-A CUPLA, BSPT 1/4" thread, brass, viton	-	50	In stock	Enquiry
NK-3S-A-B	SP-A CUPLA quick coupling socket, BSPT 3/8" thread, brass	-	50	In stock	Enquiry
NK-3S-A-B-V	Quick coupling socket SP-A CUPLA, BSPT 3/8" thread, brass, viton	-	50	In stock	Enquiry
NK-4S-A-B	SP-A CUPLA quick coupling socket, BSPT 1/2" thread, brass	-	30	In stock	Enquiry
NK-6S-A-B	SP-A CUPLA quick coupling socket, BSPT 3/4" thread, brass	-	30	In stock	Enquiry
NK-6S-A-B-E	Quick coupling socket SP-A CUPLA, BSPT 3/4" thread, brass, EPDM	-	30	In stock	Enquiry
NK-6S-A-B-V	Quick coupling socket SP-A CUPLA, BSPT 3/4" thread, brass, viton	-	30	In stock	Enquiry
NK-8S-A-B	SP-A CUPLA quick coupling socket, 1" BSPT thread, brass	-	30	In stock	Enquiry
NK-8S-A-B-V	Quick coupling socket SP-A CUPLA, BSPT 1" thread, brass, viton	-	30	In stock	Enquiry

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The Nitto Kohki SP CUPLA Type A socket with integrated shut-off valve is a high-performance quick coupling solution designed for demanding industrial environments. Manufactured from robust brass, it ensures long-lasting durability and reliable operation even under intensive use. Its internal BSPT thread guarantees secure and leak-free connections, making it an excellent choice for applications involving water, hydraulic oils, steam, chemicals, compressed air, and various gases. With a working pressure capacity of up to 50 bar for smaller sizes (1/8″, 1/4″, 3/8″), 30 bar for medium sizes (1/2″, 3/4″, 1″), 20 bar for larger diameters (1.1/4″, 1.1/2″), and 15 bar for 2″, this coupling adapts seamlessly to diverse system requirements. The wide operating temperature range, depending on seal material—NBR from -20°C to +80°C, Viton from -20°C to +180°C, and EPDM from -40°C to +150°C—ensures versatility across multiple industries and working conditions. Engineered for efficiency, safety, and ease of use, the SP CUPLA Type A socket is the ideal solution for professionals seeking a reliable connection system that enhances performance, minimizes downtime, and delivers consistent results in both standard and extreme operating environments.