Carbon steel knife gate valve is the bottom of the flat plate valve plate with a knife-type beveled cut, with the function of cutting off the medium, so that the valve closure is not blocked by the medium. This valve is generally used for pulp, coal ash, chemical raw materials, sewage, food and other media circulation opening and closing. Pressure range are generally used within 1.6MPa, the temperature is generally used below 120 ℃, high temperature can also be used instead of special materials.
Carbon Steel Knife Gate Valve Specification
| Nominal Size | DN50~DN600 |
| Pressure Rating | PN6/PN10/PN16;CL150(PN20) |
| Operateing Temperature | -29℃~150℃ |
| Characteristics | Quickly open |
| Seat Leakage Class | MSS SP81-2001: D,AA |
| Body Material | WCB,CF8,CF8M etc. |
| Trim Material | 16Mn+ENP+Stellite/304spraying Stellite/304nitriding/304+WC etc. |
| Seal Material | PTFE, Flexible graphite |
Carbon Knife Gate Valve
Carbon steel knife gate valve sealing instructions
1. Soft sealing (one-way or two-way) temperature ≤ 280C: applicable media for gas, liquid and other fluidity, low density gas-liquid media. Advantages: strong sealing performance, not easy to leak inside and outside. Disadvantages: contact with particles or high temperature media will cause seal damage.
2. Hard seal (one-way or two-way) Temperature ≤ 1000C: for a variety of solid, dust, particles and other hard media. Advantage: strong abrasion resistance. Disadvantages: poor sealing, not applicable to other and liquid and other media pipeline.
Installation and use of knife gate valve
1. Before installation, the valve cavity and sealing surface should be inspected, and no dirt or sand is allowed to adhere;
2. The bolts of each connection part should be tightened evenly. 3;
3. check the packing parts require pressure, not only to ensure the sealing of the packing, but also to ensure that the gate opens flexibly;
4. before installing the valve, the user must proofread the valve model, connection size and attention to the medium flow direction, to ensure consistency with the valve requirements;
5. users in the installation of the valve, must reserve the necessary space for the valve drive;
6. drive wiring must be carried out in accordance with the wiring diagram;
7. knife gate valve must be regularly maintained, not random collision and extrusion, so as not to affect the seal.
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