Gate Valves Can be Classified in Two Ways
- According to the structure of the stem, the gate valve can be divided into
1) Rising stem gate valve: The stem nut is on the bonnet or bracket. When opening and closing the gate, the stem nut is rotated to achieve the lifting of the stem. This structure is beneficial to the lubrication of the valve stem, and the degree of opening and closing is obvious, so it is widely used.
2) Dark stem gate valve: The stem nut is in the valve body and is in direct contact with the medium. When opening and closing the gate, it is realized by rotating the valve stem.
- It can be divided according to the structure of the ram
1) Parallel gate valve: The sealing surface is parallel to the vertical centerline, that is, a gate valve with two sealing surfaces parallel to each other.
2) Wedge gate valve: the sealing surface is at a certain angle to the vertical center line, that is, the two sealing surfaces are wedge-shaped.
