Short Description

Model No.: knife-gate-valve

China Valves Manufacturer www.sfutube.com offers knife gate valve.

Request a quote Share

Key Specifications / Features

Type: Knife Gate Valve
Design & Manufactured to API 6D, ASME B16.34 or Equivalent
P.T Ratings to ASME B16.34
Face to Face dimensions to ASME B16.10
Flanged Ends to ASME B16.5
Butt-weld Ends to ASME B16.25
Threaded Ends to ASME B1.20.1
Socket-weld Ends to ASME B16.11
Valves Marking to MSS SP-25
Inspect & Tested to API 598
Size Ranges from 1 1/2” thru 24”
Pressure Ratings from Class 600 to Class 2500, PN110 to PN420
Structures in Bolted or Pressure Sealed Union Cover
Ends Connections in Flanged R.F or RTJ, Threaded NPT, BSPT, Welded S.W, B.W and Grooved
Body Materials available in Cast Carbon Steel, Low Temp. Carbon Steel, Alloy Steel, Stainless Steel, Monel, Alu. Bronze etc.
Trim Materials available in 13%Cr, F11, F22, SS304, SS304L, SS316, SS316L and other specials.

What are Knife Gate Valves

Knife gate valve, also known as slurry valve, its opening and closing member is the gate, the direction of movement of the gate is perpendicular to the direction of the fluid, by the knife blade gate can cut fiber material to cut off the medium, the gate has two sealing surfaces, the most commonly used mode gate valve two sealing surfaces form a wedge, wedge angle varies with the parameters of the valve, usually 5 °, wedge type knife gate valve gate can be made into a The gate of the wedge-type knife gate can be made into a whole, called rigid gate; can also be made into a gate that can produce a slight deformation to improve its process, to make up for the deviation of the sealing surface angle in the process, this gate is called a resilient gate. The valve body actually does not exist in the chamber, the gate in the side guide groove to lift, and by the bottom of the lug pressed on the seat, if you need to achieve a high media sealing, O-seal seat can be used to achieve a two-way seal. Knife gate valve has a smaller installation space, low working pressure, not easy to accumulate debris, and lower price.
Knife gate valve closed, the sealing surface can only rely on media pressure to seal, that is, rely on media pressure will be the sealing surface of the gate to the other side of the seat to ensure the sealing surface of the seal, which is self-sealing, most of the gate valve is used to force the seal, that is, when the valve is closed, to rely on external force to force the gate to the seat, to ensure the sealing surface of the seal. This type of valve in the pipeline should generally be installed vertically.
Knife gate valve drive mode: manual, sprocket, electric, pneumatic, hydraulic, bevel gear, electric control and pneumatic-hydraulic drive mode. Knife gate valve shape: open stem, concealed stem two kinds. 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 seal.
Ultra-thin knife gate valve with its small size, low resistance, light weight, easy to install, easy to disassemble and other advantages completely solve the common gate valve, flat gate valve, ball valve, globe valve, regulating valve, butterfly valve and other types of valves with large resistance, weight, difficult to install, large footprint and other difficult problems. After the emergence of knife gate valve, a large number of general cut-off class valves and regulating valves have been replaced by the. The world’s largest amount of knife gate valve is the United States and Japan.
Knife gate valves are used in the following areas.

  • 1. Mining, washing coal, steel industry – for washing coal pipeline, filter slurry pipeline, etc., ash discharge pipeline.
  • 2. Purification devices – for wastewater, slurry, dirt and clarified water with suspended matter.
  • 3. Paper industry – for pulp of any consistency, material-water mixtures.
  • 4. Power station ash removal – for ash slurry.

We focus on valves in standard and special materials as customer request.
Our main materials show as the follows:
Any request for other materials, please contact our machinery sales or engineering team on email.

Special Material Titanium or Titanium alloy series Titanium (Gr.2,Gr.3,Gr.5,Gr.7,Gr.12)
Nickel alloy series Ni6,Ni200,Ni201
Monel 400,Monel k500
Inconel 600/625/690/750
Incoloy 800/825/800H/800HT
Hastelloy B3/C/C4/C22/C276/G30
Zirconium alloy series Zirconium 702/703/705
Bronze alloy series Nickel aluminum bronze C95800
(Super) Duplex Steel ASTM F51/F53/F55
Other corrosion resistance Alloy 20,AISI 321,310,904L
Normal Material Carbon Steel WCB,WCC,LCB,LCC,A105N,LF2
Alloy Material (Low Temperature) LC1,LC2,LC3,LF3
Alloy Material (High Temperature) WC1,WC6,WC9,C5,C12A
Stainless Steel CA15,CF8,CF8M,CF3,CF3M

Dimensions of Bellow Seal Gate Valve

Dimension 3 - Knife Gate Valve

DIN2632 PN10

DN L D D1 D2 D0 N-Th d H1
50 172 165 125 99 180 4-M16 Ø18 260
65 172 185 145 118 200 4-M16 Ø18 292
80 172 200 160 132 200 8-M16 Ø18 320
100 172 220 180 156 240 8-M16 Ø18 358
125 174 250 210 184 260 8-M16 Ø18 395
150 174 285 240 211 280 8-M20 Ø23 450
200 180 340 295 266 300 8-M20 Ø23 532
250 220 395 350 319 320 12-M20 Ø23 670
300 255 445 400 370 350 12-M20 Ø23 758
350 255 505 460 429 400 16-M20 Ø23 857
400 281 565 515 480 450 16-M24 Ø27 946
450 305 615 565 530 500 20-M24 Ø27 1023
500 350 670 620 582 500 20-M24 Ø27 Gear
600 369 780 725 682 20-M27 Ø30 Gear
700 372 895 840 794 24-M27 Ø30 Gear
800 405 1015 950 901 24-M30 Ø33 Gear
900 480 1115 1050 1001 28-M30 Ø33 Gear
1000 535 1230 1160 1112 28-M33 Ø36 Gear

ANSI 150LB

DN L D D1 D2 D0 N-Th d H1
2″ 172 152 121 92 180 4-5/8″ Ø19 260
2-1/2″ 172 178 140 105 200 4-5/8″ Ø19 292
3″ 172 191 153 127 200 4-5/8″ Ø19 320
4″ 172 229 191 157 240 8-5/8″ Ø19 358
5″ 174 254 216 186 260 8-3/4″ Ø22 395
6″ 174 279 242 216 280 8-3/4″ Ø22 450
8″ 180 343 299 270 300 8-3/4″ Ø22 532
10″ 220 406 362 324 320 12-7/8″ Ø25 670
12″ 255 483 432 381 350 12-7/8″ Ø25 758
14″ 255 533 476 413 400 12-1″ Ø29 857
16″ 281 597 540 470 450 16-1″ Ø29 946
18″ 305 635 578 533 500 16-1 1/8″ Ø32 1023
20″ 350 699 635 584 500 20-1 1/8″ Ø32 Gear
24″ 369 813 750 691 20-1 1/4″ Ø35 Gear
28″ 372 927 864 800 28-1 1/4″ Ø35 Gear
32″ 405 1060 978 914 28-1 1/2″ Ø41 Gear
36″ 480 1170 1086 1022 32-1 1/2″ Ø41 Gear
40″ 535 1290 1200 1124 36-1 1/2″ Ø41 Gear

Request a quote

    Subject:

    Products Related to Knife Gate Valve

  • No related articles