- Hand lever
Types of knife gate valves:
- Knife gate valve driving mode: manual, electric, pneumatic, hydraulic, bevel gear, electro-hydraulic and pneumatic-hydraulic driving modes.
- Knife gate valve shape: two kinds of rising stemand non-rising stem.
- Knife gate valve material: cast iron, cast steel, carbon steel, stainless steel, fluorine lining, etc.
- Knife gate valve seal: hard seal, soft seal, single-sided seal, double-sided seal and other materials.
The development of knife gate valves in China has gone through a short period of 20 years, and its use has expanded from ordinary fields to a wider range of industries. Coal preparation, gangue discharge and slag discharge from mines and power plants. It has developed into 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 valves, globe valves, regulating valves, butterfly valves and other valves with its advantages of small size, small flow resistance, light weight, easy installation, and easy disassembly. , Heavy weight, difficult installation, large area and other difficult problems. After the emergence of knife gate valves, a large number of general shut-off valves and regulating valves have been replaced.
Work performance and installation of knife gate valve
Knife gate valve has the advantages of simple and compact structure, reasonable design, light material saving, reliable sealing, light and flexible operation, small size, smooth passage, small flow resistance, light weight, easy installation, easy disassembly, etc. It can work at a working pressure of 1.0MPa- 2.5MPa, normal work under the operating temperature of -29-650℃. The gate of the knife gate valve has a shearing function, which can scrape off the adhesion on the sealing surface and automatically remove the debris. The stainless steel gate can prevent the seal leakage caused by corrosion.
Installation and use of knife gate valve
- Before installation, check the valve cavity and sealing surface and other parts, and no dirt or sand particles are allowed to adhere;
- The bolts of each connection part shall be evenly tightened;
- Check that the packing parts are required to be pressed tightly, not only to ensure the tightness of the packing, but also to ensure the flexible opening of the gate;
- Before installing the valve, the user must check the valve model, connection size and pay attention to the flow direction of the medium to ensure consistency with the valve requirements;
- When installing the valve, the user must reserve the necessary space for the valve drive;
- The wiring of the drive device must be carried out according to the wiring diagram;
- Knife gate valves must be maintained regularly, and no collision or squeezing is allowed to avoid affecting the seal.
Knife gate valve types: single clamp type knife gate valve, single clamp type slurry gate valve, single clamp type knife gate valve, Knife type mud gate valve, knife type slag discharge gate valve, single clamp type slurry gate valve.
Knife Gate valve features
Structural characteristics of knife gate valve
- The lift-ablegate sealing surface can scrape off the adhesive on the gate and automatically remove debris.
- Stainless steel gate can prevent seal leakage caused by corrosion.
- The overall stainless steel material can prevent corrosion damage.
- The short structure length can save raw materials and installation space, and also effectively support the strength of the pipeline.
- TheScientific upper seal stuffing box design makes the upper seal safe, effective and durable.
- The Triangular bracket saves raw materials and ensures the required mechanical properties.
- The guide block on the valve body makes the gate move correctly. The squeeze block ensures effective sealing of the gate.
- The design of the body stiffener improves the strength of the valve body.
- Stainless steel valve stem is durable, and the double-headed screw can be opened and closed more quickly.
- The driving methodcan be selected arbitrarily.
- The V-type gate can be used as a regulating valve.
Related types of valves:
We can also produce gate valve, check valve, globe valve, and ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D,