Knife gate valve by definition is the bottom of the plate valve plate with a knife oblique incision has cut off the media's function, so that the valve is closed from medium blocked. This valve is generally used for the circulation of opening and closing of the pulp, coal ash, chemical raw materials, sewage, food, and other media. Pressure range are generally 1. 6MPa or less, the temperature is generally below 120 ℃, high temperature can also be used instead of using special material. According to the the sealed performance requirements can be divided into soft seal and hard seal. The soft seal can reach 0 leaked the hard seal different leaked grade test.
The
valve is easy to operate, open free, flexible and reliable movement; simple assembly and maintenance of the valve, the sealing structure is reasonable, the seal replacement convenient and practical.
Certain price advantage and technological advantages of knife gate valves in the industry. There are two gate sealing surface, the most common mode of gate valve sealing surface to form wedge, wedge angle with the valve parameters, usually 50, wedge type
knife gate valve can be made into a whole, called the rigid gate; may also be made to produce trace deformation gate, in order to improve their craft, and make up the sealing surface angle deviation in the process, this gate is called the flexible gate knife gate valve is closed, the sealing surface can only rely on media pressure to seal, to rely on media pressure on the sealing surface of the ram pressure to the other side of the valve seat to ensure the sealing surface of the seal, which is self-sealing. majority of knife gate valve is sealed by force, that is, the valve is closed, to rely on external force to ram pressure to the valve seat to ensure the sealing surface of the seal of the valve in the pipeline should generally be mounted horizontally.
Knife gate valve drive: manual, electric, pneumatic, hydraulic, bevel gear, electric hydraulic and pneumatic and hydraulic drive way.
Knife gate valve shape: the next shot, dark bar two.
Knife gate valve material: cast iron, cast steel, carbon steel, stainless steel, lined.
The knife gate valve seal: a variety of materials such as hard seal, soft seal, seal on one side, double sealed sealed.
Knife gate valve has many features. Ultra-short length of the structure, material savings, the overall weight of the piping system can be greatly reduced. Small occupied space efficient, and can effectively support the strength of the pipe, can reduce the possibility of the pipe vibration. Ram selected austenitic stainless steel, corrosion-resistant performance greatly improved, can effectively prevent corrosion due to ram seal leaking diarrhea. The upper seal packing flexible PTFE, reliable sealing, light and flexible operation. The gate guillotine functionality can be the effective gate off the media in all kinds of debris. Hard sealed stainless steel
flap valve spray welding processing, good expansion valve temperature and pressure.
