Can the Quick-connection socket DN7.8 with valve, threaded, hardened steel, series 1625KA be used with fluids other than compressed air and is it compatible with non-hardened steel plugs?

Quick-connection socket DN7.8 with valve, threaded, hardened steel, series 1625KA is designed primarily for compressed air; safe operation is guaranteed only with hardened steel plugs from series 25KA. Technically, the socketâs materials (hardened steel QPQ body, nickel-plated brass connection, stainless spring/balls/ring, NBR seals) and working pressure (35 bar) allow use with some other non-aggressive fluids, and flow data for water (43.3 l/min, Kv=2.6 at Îp=1 bar) are provided. However, compatibility depends on the fluidâs chemical aggressiveness, temperature (operating range -20Â°C to +40Â°C), and seal material (NBR). Aggressive chemicals, oils incompatible with NBR, or temperatures outside the range may damage seals or plating and are not recommended. Regarding plugs: compatibility and safe operation require using hardened steel plugs (series 25KA). Using non-hardened steel plugs is not recommended and may compromise locking, wear resistance, and safety; the manufacturer explicitly guarantees safe operation only with hardened steel plugs. If you plan alternative fluids or non-hardened plugs, consult the manufacturer for suitability or select compatible materials/seals.

Is the Quick-connection socket DN7.8 with valve, threaded, hardened steel, series 1625KA suitable for use with water or other fluids?

Quick-connection socket DN7.8 with valve, threaded, hardened steel, series 1625KA is primarily designed for compressed air. Its materials (hardened steel QPQ, NBR seal) and performance data include a water flow figure (43.3 l/min at Îp=1 bar, Kv=2.6) and a working pressure up to 35 bar, indicating it can physically handle water and other non-aggressive fluids within the stated temperature range (â20Â°C to +40Â°C). However, safe operation and guaranteed coupling performance are specified only when used with hardened steel plugs (series 25KA). For fluids other than water, verify chemical compatibility with NBR seals and component materials before use.

Quick-connection socket DN7.8 with valve, threaded, hardened steel, series 1625KA

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

Additional information

Material	CS – steel (cast iron)

Quick coupling socket with valve DN7.8, with external BSPT thread or internal BSP thread, series 1625KA – belongs to the premium class with increased performance and features a shock-resistant plastic locking sleeve. Designed primarily for compressed air. The socket body is made of hardened steel through the carbonitriding process in a salt bath QPQ, enhancing resistance to wear and corrosion (black color). Operated with one hand. Safe operation of the coupling can only be guaranteed when used with plugs made of hardened steel (series 25KA). Performance: 2020 l/min (Pe = 6 bar, Δp=0.5 bar – air), 43.3 l/min (Δp=1 bar, Kv=2.6 – water). Working pressure: 35 bar. Material: hardened steel QPQ (socket body), PA6 + TPE (sleeve), nickel-plated brass (connection part), stainless steel (spring, balls, and ring). Sealing: NBR. Operating temperature: from -20°C to +40°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
RE-1625KAAK13SPN	Quick coupling socket 1625 DN7.8, GZ 1/4" BSPT, NBR	-	35	In stock	Enquiry
RE-1625KAAK17SPN	Quick coupling socket 1625 DN7.8, GZ 3/8" BSPT, NBR	-	35	In stock	Enquiry
RE-1625KAAK21SPN	Quick coupling socket 1625 DN7.8, GZ 1/2" BSPT, NBR	-	35	In stock	Enquiry
RE-1625KAIW13SPN	Quick coupling socket 1625 DN7.8, GW 1/4" BSP, NBR	-	35	In stock	Enquiry
RE-1625KAIW17SPN	Quick coupling socket 1625 DN7.8, GW 3/8" BSP, NBR	-	35	In stock	Enquiry
RE-1625KAIW21SPN	Quick coupling socket 1625 DN7.8, G 1/2" BSP, NBR	-	35	In stock	Enquiry

Do you need a larger quantity of products or a bespoke quote?

Call us: +48 61 653 02 22 or email us: tubes@tubes-international.com

SEND ENQUIRY

Quick coupling socket with valve DN7.8, with external BSPT thread or internal BSP thread, series 1625KA – belongs to the premium class with increased performance and features a shock-resistant plastic locking sleeve. Designed primarily for compressed air. The socket body is made of hardened steel through the carbonitriding process in a salt bath QPQ, enhancing resistance to wear and corrosion (black color). Operated with one hand. Safe operation of the coupling can only be guaranteed when used with plugs made of hardened steel (series 25KA). Performance: 2020 l/min (Pe = 6 bar, Δp=0.5 bar – air), 43.3 l/min (Δp=1 bar, Kv=2.6 – water). Working pressure: 35 bar. Material: hardened steel QPQ (socket body), PA6 + TPE (sleeve), nickel-plated brass (connection part), stainless steel (spring, balls, and ring). Sealing: NBR. Operating temperature: from -20°C to +40°C.