Is the One-way quick-connection socket with hose end, hardened steel, series 1625KA DN 7.8 suitable for use with fluids other than compressed air?

One-way quick-connection socket with hose end, hardened steel, series 1625KA DN 7.8 is designed primarily for compressed air. Its materials and seals (hardened steel QPQ body, nickel-plated brass connection, stainless steel internals, NBR sealing) and performance data are specified for air and include a water flow figure (43.3 l/min, Îp=1 bar, Kv=2.6), but safe and guaranteed operation is stated only when used with plugs made of hardened steel (series 25KA). NBR seals have limited chemical compatibility and the operating temperature range is â20Â°C to +40Â°C. Therefore, use with fluids other than compressed air is not recommended without manufacturer confirmation.limited use with water may be possible given the stated Kv, but compatibility with other liquids (oils, fuels, solvents, aggressive chemicals) is uncertain and could damage seals or plating and compromise safety. For any non-air application, consult the manufacturer or supplier for approval and compatibility data.

Can the One-way quick-connection socket with hose end, hardened steel, series 1625KA DN 7.8 withstand continuous operation at 35 bar?

Yes. The One-way quick-connection socket with hose end, hardened steel, series 1625KA DN 7.8 is rated with a working pressure of 35 bar, so it can withstand continuous operation at 35 bar within its specified operating temperature range (-20Â°C to +40Â°C), provided it is used with compatible hardened-steel plugs (series 25KA) and maintained per manufacturer guidelines.

Does the One-way quick-connection socket with hose end, hardened steel, series 1625KA DN 7.8 require specific maintenance to preserve the QPQ finish and sealing?

One-way quick-connection socket with hose end, hardened steel, series 1625KA DN 7.8 does not require special maintenance beyond standard care to preserve the QPQ finish and sealing, but following a few precautions will extend service life and appearance: - Clean regularly: remove dirt, dust and debris from the socket body and sleeve with a soft cloth; avoid abrasive brushes that can damage the QPQ layer. - Avoid aggressive chemicals: do not use strong acids, alkalis or chlorinated solvents that can attack the QPQ coating or NBR seals; use mild detergents or approved cleaning agents. - Inspect seals: check the NBR sealing ring periodically for wear, cuts or hardening; replace if damaged to maintain sealing performance. - Lubrication: apply a light film of compatible lubricant (silicone or mineral oil suitable for NBR) to seals and moving parts as needed; avoid petroleum-based greases that may swell NBR. - Prevent corrosion: while QPQ improves corrosion resistance, avoid prolonged exposure to salt spray or corrosive environments; rinse with fresh water after exposure to saline conditions and dry. - Use correct mating parts: always pair with hardened steel plugs (series 25KA) to ensure safe operation and prevent undue wear that could damage the QPQ finish. - Storage: store in a dry, temperature-controlled area within the specified range (-20Â°C to +40Â°C) and protect from mechanical damage. - Mechanical care: avoid impacts and abrasion to the black QPQ surface; check spring, balls and ring (stainless steel) for proper function and cleanliness. Following these routine measures will help preserve the QPQ finish and maintain sealing performance of the One-way quick-connection socket with hose end, hardened steel, series 1625KA DN 7.8.

One-way quick-connection socket with hose end, hardened steel, series 1625KA DN 7.8

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

Additional information

Material	CS – steel (cast iron)

Quick coupling socket with valve DN7.8, with hose end, series 1625KA – belongs to the premium class with increased performance and features an impact-resistant plastic locking sleeve. Designed primarily for compressed air. The socket body is made of hardened steel through the process of carbonitriding 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-1625KATF06SPN	Quick coupling socket 1625 DN7.8, for 6 mm hose, NBR	6	35	In stock	Enquiry
RE-1625KATF08SPN	Quick coupling socket 1625 DN7.8, for 8 mm hose, NBR	8	35	In stock	Enquiry
RE-1625KATF09SPN	Quick coupling socket 1625 DN7.8, for 9 mm hose, NBR	8	35	In stock	Enquiry
RE-1625KATF10SPN	Quick coupling socket 1625 DN7.8, for 10 mm hose, NBR	10	35	In stock	Enquiry
RE-1625KATF13SPN	Quick coupling socket 1625 DN7.8, for hose 13 mm, NBR	12	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 hose end, series 1625KA – belongs to the premium class with increased performance and features an impact-resistant plastic locking sleeve. Designed primarily for compressed air. The socket body is made of hardened steel through the process of carbonitriding 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.