Its products have certain price advantages and technical advantages in the industry. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used mode gate valve form a wedge shape. The wedge angle varies with the valve parameters, usually 50. The gate of the wedge type knife gate valve can be made into a whole, called Rigid gate; it can also be made into a gate that can produce a small amount of deformation to improve its craftsmanship and make up for the deviation of the sealing surface angle during processing. This gate is called an elastic gate. When the knife gate valve is closed, the sealing surface It can only rely on the medium pressure to seal, that is, relying on the medium pressure to press the sealing surface of the gate to the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most knife gate valves are forced to seal, that is When the valve is closed, it is necessary to rely on external force to force the gate to the valve seat to ensure the tightness of the sealing surface. This type of valve should generally be installed horizontally in the pipeline. Knife gate valve drive mode: manual, electric, pneumatic, hydraulic, bevel gear, electro-hydraulic and gas-hydraulic and other driving methods. Knife gate valve shape: two kinds of knife gate valve: open rod and dark rod material seal. Entered our country from the 1980s. In less than two decades, its use has expanded from the general field to a wider variety of industries. Coal preparation, gangue discharge and slag discharge from mining power plants. It has developed to urban sewage treatment, and has developed from general industrial pipelines to professional pipeline systems such as food, sanitation, and medicine. The ultra-thin knife gate valve completely solves the large flow resistance of ordinary gate valves, flat gate valves, ball valve
s, globe valves, regulating valves, butterfly valve
s and other valves with its advantages of small size, small flow resistance, light weight, easy installation and easy disassembly , heavy weight, difficult installation, large floor space and other difficult problems. After the appearance of the knife gate valve, a large number of general-purpose shut-off valves and regulating valves have been replaced by them. Today, the world's largest use of knife gate valve is the United States and Japan.
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