1.opening pressure: 25Kpa 2.Effective oil jetting ccaliber: 25mm 3.Mounting method: screw mounting 4.pressure valve 1.This series of pressure control valves applies to the pressure protection of the oil boxes of the products of oil-immersed transformer fully-seales transformer, amorphors alloy transformer, American-box transformer, also applies to the products of load votage-regulating switch, ...