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.

Socket quick coupling with a female BSP threadT with valve, NITTO KOHKI SP CUPLA type A, brass

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

Additional information

Material	B – brass (bronze)

Socket with a shut-off valve Nitto Kohki series SP CUPLA type A with thread internal BSPT o excellent durability, intended for water, oils hydraulic, steam, chemicals, air and gases. Material: brass. Working pressure: 50 bar (1/8″, 1/4″, 3/8″), 30 bar (1/2″, 3/4″, 1″), 20 bar (1.1/4″, 1.1/2″), 15 bar (2″). Operating temperature: od -20°C up to +80°C (NBR), od -20°C up to +180°C (Viton), od -40°C up to +150°C (EPDM).

List of product variants

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

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Socket with a shut-off valve Nitto Kohki series SP CUPLA type A with thread internal BSPT o excellent durability, intended for water, oils hydraulic, steam, chemicals, air and gases. Material: brass. Working pressure: 50 bar (1/8″, 1/4″, 3/8″), 30 bar (1/2″, 3/4″, 1″), 20 bar (1.1/4″, 1.1/2″), 15 bar (2″). Operating temperature: od -20°C up to +80°C (NBR), od -20°C up to +180°C (Viton), od -40°C up to +150°C (EPDM).