Knife gate valve

Short Description:

Knife gate valve, also known as knife gate valve, knife slurry valve. Its opening and closing parts are gates, whose moving direction is perpendicular to the fluid direction, and the medium is cut off by a knife-edge gate which can cut the fibre material. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used mode gate valves form wedges, and the wedge angle varies with the valve parameters, usually 50.


Product Detail

Product Tags

Knife gate valve, also known as knife gate valve, knife slurry valve. Its opening and closing parts are gates, whose moving direction is perpendicular to the fluid direction, and the medium is cut off by the knife-edge gate which can cut the fibre material. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used mode gate valve are wedge-shaped, and the wedge angle varies with the valve parameters, usually 50. The gate of the wedge-knife gate valve can be made into a whole, called a rigid gate. In order to make a gate which can produce slight deformation to improve its technicality and make up for the deviation caused by the angle of sealing surface in the process of processing, this kind of gate is called elastic gate. In fact, there is no chamber in the valve body. The gate rises and falls in the side guide groove, and is pressed on the seat by the bottom lug. If high medium sealing is needed, O-shaped sealing seat can be used to achieve bidirectional sealing. Knife gate valve has less installation space, low working pressure, not easy to accumulate debris, low price.

 

When the knife gate valve closes, the sealing surface can be sealed only by the medium pressure, that is to say, the sealing surface of the gate plate is pressed to the seat on the other side to ensure the sealing surface, which is self-sealing. Most knife gate valves are forced to seal, that is, when the valve closes, the gate plate is forced to the seat by external force to ensure the sealing surface. Valves of this type shall generally be installed horizontally in pipes.

 

Product characteristics

1. This series of specifications and valves are suitable for sewage treatment, chemical industry, paper pulping industry and mining coal washing industry. They play a cut-off and opening role in pipelines such as suspended balls and slurry with liquid medium.

2. Valves are sealed by unilateral force, which is not only reliable, but also can eliminate deposits to meet the sealing requirements. The valve body can be made of cast iron, carbon steel, stainless steel and polytetrafluoroethylene to meet different requirements of corrosion resistance and wear resistance.

3. The structure is short in length and light in weight. Installation and maintenance are very convenient.

4. Applicable Temperature: -10 ~120

5. Nominal Pressure (0.25MPa), 0.6MPa, 1.0MPa

 

Design drawings

刀闸阀

 

Major Dimensions and Weights

PN(MPa) DN(mm) L D D1 D2 D0 n-Th d H1 H2 重量
1.0~1.6 50 48 165 125 99 180 4-M16 18 290 350 10
65 48 185 145 118 200 4-M16 18 310 375 11
80 51 200 160 132 220 8-M16 18 350 430 13.5
100 51 220 180 156 240 8-M16 18 405 505 15.5
125 57 250 210 184 260 8-M16 18 450 575 23.5
150 57 285 240 212 280 8-M20 23 510 660 29
200 70 340 295 266 300 8-M20/12-M20 23 610 810 43/43.5
250 70 395/405 350/355 319 340 12-M20/12-M24 23/27 765 1015 67.5/68
300 76 445/460 400/410 370 380 12-M20/12-M24 23/27 820 1120 100.5/101
350 76 505/520 460/470 430 400 16-M20/16-M24 23/27 970 1320 126/127
400 89 565/580 515/525 480 450 16-M24/16-M27 27/30 1024 1424 176.2/177
450 89 615/640 565/585 530/548 530 20-M24/20-M27 27/30 1235 1685 289/290
500 114 670/715 620/650 582/609 600 20-M24/20-M30 27/33 1286 1786 380/
382
600 114 780/840 725/770 682/720 600 20-M27/20-M33 30/36 1486 2086 498.6/500

 


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