Does the Quick-connection socket DN7.8 with valve, with hose end, hardened steel, series 1600KA require special maintenance for QPQ-treated surfaces?

Quick-connection socket DN7.8 with valve, with hose end, hardened steel, series 1600KA does not require any special maintenance specifically because of the QPQ (carbonitriding in a salt bath) surface treatment. QPQ increases wear and corrosion resistance, providing a durable black finish that reduces routine upkeep compared with untreated steel. Standard maintenance recommendations still apply: - Regular visual inspection for damage, wear or contamination. - Clean with mild soap and water or a solvent compatible with NBR seals; avoid aggressive acids/chlorides that could attack other components. - Lubricate moving parts occasionally with a light machine oil or a lubricant compatible with NBR seals to ensure smooth operation. - Check and, if necessary, replace NBR seals when worn or damaged. - Use only hardened steel plugs of series 25KA as specified to ensure safe operation and avoid accelerated wear. Avoid prolonged exposure to highly corrosive media (strong acids, chlorides) and stray current corrosion environments; if such exposure is expected, increase inspection frequency.

Quick-connection socket DN7.8 with valve, with hose end, hardened steel, series 1600KA

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 1600KA – belongs to the premium class with increased performance, intended primarily for compressed air, especially where high efficiency is required in a small size of the quick coupling. The socket body is made of hardened steel through the process of carbonitriding in a salt bath QPQ, increasing 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 QPQ steel (socket body), nickel-plated brass (connection part and sleeve), stainless steel (spring, balls, and ring). Sealing: NBR. Operating temperature: from -20°C to +100°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
RE-1600KATF06SPN	Quick coupling socket 1600 DN7.8, for 6 mm hose, NBR	6	35	In stock	Enquiry
RE-1600KATF08SPN	Quick coupling socket 1600 DN7.8, for 8 mm hose, NBR	8	35	In stock	Enquiry
RE-1600KATF09SPN	Quick coupling socket 1600 DN7.8, for 9 mm hose, NBR	8	35	In stock	Enquiry
RE-1600KATF10SPN	Quick coupling socket 1600 DN7.8, for 10 mm hose, NBR	10	35	In stock	Enquiry
RE-1600KATF13SPN	Quick coupling socket 1600 DN7.8, for hose 13 mm, NBR	12	35	In stock	Enquiry

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Quick coupling socket with valve DN7.8, with hose end, series 1600KA – belongs to the premium class with increased performance, intended primarily for compressed air, especially where high efficiency is required in a small size of the quick coupling. The socket body is made of hardened steel through the process of carbonitriding in a salt bath QPQ, increasing 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 QPQ steel (socket body), nickel-plated brass (connection part and sleeve), stainless steel (spring, balls, and ring). Sealing: NBR. Operating temperature: from -20°C to +100°C.