THFX cock reversing valve (two-way valve) is to switch the material in a pneumatic conveying system equipment. It can make the pipe to change transport direction under the flow state of material without having to interrupt feeding and stop supply, to send the material to the two selected location. If several valve combination of the material can be sent to many of the selected location, so the operation is very convenient. Is widely used in flour, bran chaff, starch, feed, sugar, chemical products and other powder material of road transportation and low-speed tubes was change in the conveying direction, make the material sent to the selected location.