Nitto Kohki Zero Spill Cupla

Nitto Kohki Zero Spill Cupla quick-release couplings are engineered for systems operating at medium pressures up to 75 bar, delivering a measured residual fluid loss of <0.01 ml per connect/disconnect cycle - a figure verified against ISO 7241 coupling test protocols. The double-valve design seals both male and female halves simultaneously on separation, eliminating the hydraulic fluid spillage and air ingestion that compromise conventional single-valve couplings. Push-to-connect engagement requires <50 N insertion force even under residual line pressure, with a rated burst pressure of 4× working pressure and a minimum full-flow Cv matching nominal bore from DN 6.3 to DN 12.7.

As an authorized Nitto Kohki distributor, esd.equipment stocks 82 Zero Spill Cupla variants covering straight-through, elbow, and multi-coupling plate configurations, with bodies in carbon steel, stainless steel (SUS304/SUS316), and brass to satisfy DIN EN ISO 7241-A/-B dimensional interchangeability requirements. Seals are available in NBR, FKM, and EPDM for compatibility with hydraulic oils, phosphate-ester fluids, and water-glycol media.

Zero Spill Cupla vs. standard single-valve couplings - technical comparison

Typical application areas: Hydraulic press and injection-moulding tool changes (ISO 7241-A), semiconductor wafer-handling and process equipment coolant circuits (SEMI S2/F47), medical device manufacturing fluid systems (ISO 13485), automotive assembly line hydraulic fixture connections (IATF 16949, VDA 6.3), aerospace MRO hydraulic ground-support equipment (AS9100), chemical and food-processing clean-breakaway connections (FKM/EPDM seal variants).