Briefing of Product 1. The two-way thermal expansion valve belongs to the family of outside balance and outside temperature sensative thermal expansion valve. It has a function to adjust the flow to the evaporator forward and backward. It is applicable to the converter air-conditioners, heat pump water heaters and other cooling system with two way of working. 2. The one-way thermal expansion valve is applicable to the cooling system with only one way of working. 3. This product is an ideal choice replacing capillary tube, electronic expansion valve and other flow regulating device, and has a good advantage on ratio of performance and price. Product Features 1. Conic valve mouth structure-------may meet the different flow demands simultaneously during the forward and backward work; 2. Two-way filtration structure-------ensures no entry of the system impurities into the regulating mechanism and brings a reliable work; 3. Special hermetically sealing structure in the balancing part-------ensures a normal forward and backward work with no internal leakage; 4. Uniquely creative relief structure-------guarantees a normal work even if the thermal head is damaged unexpectedly; 5. The special way of filling the thermal head with the temperature sensing agent-------a large adjustment range, meets the different flow demands under the different working conditions; 6. MOP value protection-------can prevent the compressor from overloading; 7. Multiple hermetically sealing technique-------guarantees no refrigerant leakage of the system; 8. High sensitivity, steady regulating; 9. Small dimention, light weight, handy installation Advanced Techniques 1. Applies the home-aborad advanced sealing technique for the balancing part (Invention Patent No.: ZL200510060321.1) 2. Applies the home-aborad most advanced two-way filtrating technique (Invention Patent No.: ZL200510060320.7) 3. Applies the home-aborad pioneering guarantee structure technique (Invention Patent Application No.: 200810059286.5) 4. Applies the home-abroad most advanced conic valve mouth technique (Invention Patent Application No.: 200710071031.6)