Our QRFWH expansion valve does not only follows the American, Japanese and international car standa Our QRFWH expansion valve does not only follows 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 isof Teflon encapsulation structure, originally invented by our company, with thepatent no. of ZL01260199.3 and ZL 01226951.4.Features:1) High sensibility of regulation2) Stable regulation3) Small internal leakage4) Reliable temperature sensing, without deviation5) Without block or jump6) Long usage life7) Customers can choose from the above mentioned two structures

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