The valve stem of rising stem gate valve is exposed and can be seen, while the valve stem of Non rising stem gate valve is in the valve body and can not be seen.
1. The valve stem of rising stem gate valve is exposed and can be seen, while the valve stem of Non rising stem gate valve is in the valve body and can not be seen;
2. The rising stem gate valve is driven by the thread between the valve stem and the steering wheel, so as to drive the gate up and down; The Non rising stem gate valve drives the gate up and down by rotating the valve stem at the fixed point. When opening and closing, the steering wheel and valve stem are connected together and relatively immobile.
3. The transmission thread of the Non rising stem gate valve is located inside the valve body. During the opening and closing of the valve, the valve stem only rotates in place, and the opening and closing state of the valve cannot be judged by the naked eye; And; The transmission thread on the stem of rising stem gate valve is exposed outside the valve body, which can intuitively judge the opening and closing position of the gate valve;
4. The height dimension of Non rising stem gate valve is small, and the installation space is relatively small; When the rising stem gate valve is fully opened, it is high and requires large installation space;
5. The valve stem of rising stem gate valve is outside the valve body, which is conducive to maintenance and lubrication; The stem thread of the Non rising stem gate valve is inside the valve body, which is difficult to maintain and lubricate. Moreover, the stem is easy to be directly eroded by the medium, and the valve is easy to be damaged. The rising stem gate valve is more widely used.
