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Application of stainless steel valve in the industry (二)

3. Stainless steel globe valve, also called cut gate, is also a kind of valve that is widely used in the chemical industry. The reason why it is widely used is that the friction between the sealing surfaces is small during the opening and closing process, it is more durable, and the opening height is not large. Easy to manufacture and easy to maintain, it is not only suitable for medium and low pressure, but also suitable for high pressure. Its closing principle is that relying on the pressure of the valve stem, the sealing surface of the valve disc and the sealing surface of the valve seat are tightly fitted to prevent the flow of the medium. The globe valve can only allow the medium to move in one direction, and the device has directionality. Its structural length is longer than that of the gate valve, and at the same time, the fluid resistance is large, and the sealing reliability is not strong during long-term operation. Globe valves are divided into three categories: straight-through, right-angle and straight-through oblique globe valves.
4. The stainless steel check valve is a valve that automatically opens and closes by relying on the strength of the fluid itself. Its function is to prevent the backflow of the medium. It has many titles, such as check valve, one-way valve, one-way valve, etc. According to the structure can be divided into two categories.
1) Stainless steel swing check valve: The valve disc rotates around the pin outside the seat. This type of valve is divided into single-lobe, double-lobe and multi-lobe, but the principle is the same. The water suction bottom valve is a deformation of the check valve. Its structure is the same as that of the above two types of check valves, except that its lower end is open so that water can enter.
2) Stainless steel lift check valve: The disc moves along the vertical centerline of the valve body. There are two types of check valves of this type: one is the horizontal type, which is installed in the horizontal pipeline, and the valve body shape is similar to that of the globe valve, and the other is the vertical type, which is installed in the vertical pipeline.

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