Expansionsventil für Autoklimaanlagen

Our QRFWH expansion valve does not only follow the American, Japanese and international car standards, but also has two kinds of inner encapsulation structures: One is of international O-ring encapsulation structure, while the other one is of Teflon encapsulation structure, originally invented by our company, with the patent No. of ZL01260199.3 and ZL 01226951.4. International and domestic advanced sealing structure in the balancing part (patent number: ZL96120084.7). Advanced technology for the steel ball sealing of the bellos (patent number: 02137156.3) Advanced negative static overheat technology (patent number: ZL02257444.1) Top sensitive of regulating. Steady regulation with small fluctuation. Little leak in the balancing part. The bellows works reliably with no leak. No whistle noise, Long service life.