Technical Parameters of Self-sealing Knife Gate Valve
The knife gate valve controls the flow and cut-off of the medium based on the vertical movement of the gate plate. When the valve needs to be closed, the driving device (manual, electric or pneumatic) drives the valve stem to move downward, making the gate plate move downward along the guide rail of the valve body until the sealing surface of the gate plate fits closely with the valve seat, thus cutting off the flow. When the valve needs to be opened, the driving device drives the valve stem to move upward, making the gate plate move upward and leave the valve seat, and then the medium can pass through the valve.
The self-sealing gate valve, also known as the pressure-sealed gate valve. The sealing method of the self-sealing knife gate valve mainly relies on the medium pressure to achieve the seal. When the valve is closed, the medium pressure presses the sealing surface of the gate plate against the valve seat on the other side to ensure the seal of the sealing surface. This kind of sealing method is called self-sealing.
Product features of self-sealing knife gate valve.
- Both ends of the valve body are sealed by integral rubber valve seats. The sealing effect is achieved by clamping and pressing the gate plate between the valve seats at both ends.
- When the gate plate is fully opened, the sealing surfaces of the valve seats at both ends are closely adjacent to each other, resulting in a gapless seal. The medium will not flow into the valve cavity, thus avoiding the occurrence of jamming.
- Convenient maintenance: There is no need to remove the entire valve from the pipeline. When the valve is fully opened, the gate plate can be directly and freely removed for maintenance.
- The interior of the valve body passage is made of wear-resistant rubber material, which has strong wear resistance and corrosion resistance.
- The valve has a full bore diameter, ensuring high fluidity.
- The product is widely used in industries such as papermaking, mining, metallurgy, chemical engineering, electric power, and water treatment.
Technical parameters of self-sealing knife gate valve:
| Norminal Diameter | DN50-600 2″-24″ |
| Pressure rating | 0.6MPa、1.0MPa |
| Pressure test | DN50-200 (2″～8″) 1.0Mpa |
| DN250-400 (10″-16″ ) 0.6Mpa | |
| DN450-600 (18″～24″ ) 0.5Mpa | |
| Applicable Temperature | —20℃～+120℃ |
| Leakage Level | EPDM sealing A level (0 leakage) |
