The difference between rising stem gate valve and non rising stem gate valve.

Rising stem gate valves and non rising stem gate valves are two common types of gate valves, and they have some differences in structure and usage. The following is a detailed introduction to the difference between rising stem gate valve and non rising stem gate valve.

First of all, the rising stem gate valve refers to a structural form in which the gate valve stem is exposed outside the valve body. The valve stem is directly connected with the valve plate, and the opening and closing of the valve plate is realized by rotating the valve stem. The operating rod of the rising stem gate valve is visible from the outside, which is convenient for the operator to observe and control the state of the valve.

In contrast, a non rising stem gate valve refers to a structural form in which the valve stem is hidden inside the valve body. The valve stem and valve plate are connected through an internal mechanism, and the position and status of the valve stem cannot be directly observed during operation. The operating lever of the non rising stem gate valve is hidden inside the valve body and cannot be directly contacted. The valve needs to be operated through an external mechanism (such as a handwheel, gear, etc.).

Secondly, the rising stem gate valve can intuitively judge the opening degree of the valve during operation. By rotating the rising stem, the operator can clearly see the relative position of the valve stem and the valve plate, thereby understanding the opening and closing of the valve. This structural form facilitates maintenance and troubleshooting.

In contrast, the position of the valve stem cannot be directly observed during operation of the non rising stem gate valve. The operator can only judge the opening and closing of the valve through the rotation of the external mechanism. This is very suitable in some special environments or situations where exposure of the valve stem needs to be avoided.

In addition, the rising stem gate valve is susceptible to corrosion and damage from the external environment because the valve stem is exposed outside the valve body. The valve stem of the non rising stem gate valve is hidden inside the valve body, which is relatively safer and more reliable.

In summary, there are obvious differences in structure and use between rising stem gate valves and non rising stem gate valves. The stem of the rising stem gate valve is exposed outside the valve body, which is easy to operate and can intuitively judge the opening degree of the valve; while the stem of the non rising stem gate valve is hidden inside the valve body and is operated by an external mechanism, which is suitable for some special environments or needs to be avoided. Where the valve stem is exposed. When choosing to use it, you need to make a reasonable choice based on the specific situation and needs.