Knife gate valve is also called type knife gate valve, knife type slurry Industrial Valves, it is the opening and closing of a ram, the ram of the motion direction and perpendicular to the direction of flow on the blade shape ram can cut fiber cutting medium, sealing face has two gate, two of the most commonly used mode gate valve sealing surface form a wedge, the wedge Angle vary with the valve parameters, usually in the form of 50, wedge type knife gate valve disc can be made into a whole, is called a rigid disc; Can also make it generates trace of deformation of ram, in order to improve the manufacturability, make up for the sealing surface Angle in the process of our processing deviation, this damper is called elastic disc. Chamber body actually does not exist, ram in side guide groove inside the elevator, and from the bottom of the lugs compression on the seat, if you need to achieve high sealing medium, o-type sealing seat can be used to realize two-way sealing. Flashboard valve is used on the sewage pipe has more impurity, its optimal is environmental protection processing line. Flashboard valve is a kind of type knife gate valve, flashboard valve is typically used with larger particles of liquid pipeline, or used in pipeline of solid, powder material, usually type knife gate valve sealing effect is better, flashboard valve sealing effect. Type knife gate valve has a wide application range, according to the different material, different application of the medium. Type knife gate valve and plug valve is not a concept plug valve is simple is a circular plate is usually used for blocking the use of valve is a kind of type knife gate valve. Type knife gate valves are normally used on the fluid pipe, the flashboard valve is typically used on solid and powder materials. Type knife gate valve advantages: 1, small fluid resistance, sealing surface Chong brush and erosion by the medium. 2, open and close more effort. 3 the flow direction of medium, not restricted, disturbed flow, reduce the pressure. 4, the structure of the form is simple, short length, good manufacturing technology, wide application scope. Type knife gate valve of the advantages of: 1, easy cause erosion and abrasion, surface maintenance more difficult. 2, appearance size is larger, open needs certain space, open and close time is long. 3, the structure is complex. The flashboard valve is used in metallurgy, chemical industry, energy, gas pipeline system, is a kind of pipe separating equipment. Type knife gate valve product features: knife gate valve type ultra short length structure, save material, can make the pipeline system greatly reduce the overall weight. Type knife gate valve takes effective space is small, can effectively support the pipeline strength, can reduce the possibility of pipeline vibration. Choose austenitic stainless steel type knife gate valve gate, decay resistance performance is greatly improved, which can effectively prevent caused by disc corrosion seal xie leakage. Type knife gate valve seal packing made of PTFE flexible, reliable seal, flexible operation of the light. Type knife gate valve gate has the function of blade can effective brake circuit medium of various kinds of sundry. Type knife gate valves are widely used due to its own characteristics, first of all, its sealing effect is good, U gasket has good elasticity; Second, its full size design, passing ability; Again, the brake effect is good, it can effectively solve the containing block, particles and fibers medium brake break leakage phenomenon; Finally, because of its convenient maintenance, do not need to remove the valve to replace the valve sealing. Type knife gate Industrial Valves is closed, sealing surface can only rely on medium pressure to seal, that depend on medium pressure, the disc will be to the other side of the valve seat sealing surface pressure to ensure that the seal face seal, this is the seal. Most is adopt compulsory seal gate valve, the valve is closed, to rely on outside force forced the ram pressure to the seat, to ensure the sealing surface sealing. Type knife gate valves in the process of installation need to be aware of: through type knife gate valve with electromagnetic Industrial Valves, proximity switch and other accessories, can complete the action of two position control and signal output, also can complete automatic control of continuous motion. Type knife gate valve is widely used in chemical industry, coal, sugar, sewage, paper and other fields, is a kind of ideal seal gate valves. Particularly suitable for papermaking industry used on the pipeline to adjust and throttling. Type knife gate valve when installation should pay attention to the following details: 1. Before installation must check in areas such as the type knife gate valve cavity and seal face, there is no dirt or sand clinging to the body; 2. Each bolt connection parts, require uniform tight; 3. Check the packing pressure parts requirements, both to ensure that the packing sealing, also to ensure the gate open flexible; 4. Users must, before installation type knife gate valve, check valve type, connection to the flow direction of medium size and note, ensure consistency with the valve requirements; 5. Users in the installation type knife gate valve, must set aside the valve drive the necessary space; Type knife gate valve a visual inspection must be conducted before installation, the valve nameplate shall comply with the terms of the current national standard. For the working pressure is greater than 1. 0 MPa and the valve with the function of cutting off on ZhuGanGuan, strength and strict performance test should be done before the installation, qualified rear must use. Strength test, the test pressure for the nominal pressure of 1. 5 times, duration of not less than 5 min, shell and packing shall be no leakage of valve shall be qualified. Leak test, the test pressure for the nominal pressure of 1. 1 times; The duration of the test pressure in the test should comply with the standard of GB 50243 requirements, with no leakage for qualified for valve sealing surface. Above is the generalization of type knife gate valve is roughly
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