Feature: V series expansion valve widely applied into air-conditioner and various refrigerating devices; Adopting design with huge & flat stainless steel diaphragm and seat supported by valve needle, to make needle matched with valve port accurately,and get best tightness; Both of welded tube and valve body adopt high strength silver welding which can further avoid body leakage; It can provide best performance for air-conditioner and various of refrigerating equipment; Max.test pressure: 36bar; Allow working pressure: 28bar.