Pneumatic Knife Gate Valves Air Control Double Flange Lug Wafer Cast Steel for Slurry
Descriptions And Features Of Uni-directional Pneumatic Knife Gate Valve:
SONGO pneumatic knife gate valve is an uni-directional lug type valve designed according to MSS-SP-81 and TAPPI TIS 405-8 for industrial service applications. The design of the body and seat assures non-clogging shut off on suspended solids in industries such as:• Mixture of particles, dust, slag and water
• Pulp and paper
• Power plants
• Mining
• Chemical plants
• Sewage and wastewater treatment plants
• Food and beverage
• Etc.
It is opened and closed by controlling the vertical movement of the gate through a pneumatic actuator. Its core feature is the blade shaped design at the bottom of the gate, which can shear the medium and remove the residue on the sealing surface, suitable for harsh working conditions. Composed of pneumatic actuator, valve body, blade gate, valve stem, and sealing components. For lugged wafer or flange connections, the gate is perpendicular to the direction of the fluid and relies on medium pressure (self sealing) or external force to force sealing when closed. Single action (spring return) or double action, the air source drives the actuator to push the valve stem and drive the gate to rise and fall.
Drawing Of Pneumatic Operated Resilient Seated Lugged Knife Gate Valve:

| GB/T 9113.1 1.0Mpa | |||||||||
| Nominal Diameter | Inch | L | D | D1 | D2 | N-M | b | ●-○ | H |
| DN50 | 2" | 50 | 160 | 125 | 100 | 4-16 | 18 | 2-2 | 300 |
| DN65 | 2-1/2" | 50 | 180 | 145 | 120 | 4-16 | 18 | 2-2 | 310 |
| DN80 | 3" | 50 | 195 | 160 | 135 | 8-16 | 18 | 2-6 | 330 |
| DN100 | 4" | 50 | 215 | 180 | 155 | 8-16 | 18 | 2-6 | 370 |
| DN125 | 5" | 50 | 245 | 210 | 185 | 8-16 | 18 | 2-6 | 410 |
| DN150 | 6" | 60 | 280 | 240 | 210 | 8-20 | 23 | 2-6 | 480 |
| DN200 | 8" | 60 | 335 | 295 | 265 | 8-20 | 23 | 2-6 | 570 |
| DN250 | 10" | 70 | 390 | 350 | 320 | 12-20 | 23 | 4-8 | 720 |
| DN300 | 12" | 80 | 440 | 400 | 368 | 12-20 | 23 | 4-8 | 810 |
| DN350 | 14" | 80 | 500 | 460 | 428 | 16-20 | 23 | 6-10 | 890 |
| DN400 | 16" | 90 | 565 | 515 | 482 | 16-24 | 27 | 6-10 | 1030 |
| DN450 | 18" | 100 | 615 | 565 | 532 | 20-24 | 27 | 8-12 | 1160 |
| DN500 | 20" | 114 | 670 | 620 | 585 | 20-24 | 27 | 8-12 | 1280 |
| DN600 | 24" | 114 | 780 | 725 | 685 | 20-27 | 30 | 8-12 | 1450 |
| Limit switch | |
| Solenoid valve | |
| Filter | |
| Pneumatic actuator | SC |
| Bracket | WCB |
| Piston rod | 2Cr13 |
| Cylindrical pin | A3 |
| Packing gland | WCB |
| Packing | PTFE |
| Valve plate | 201 |
| Valve body | WCB |
| Seat sealing surface | NBR |
| Location point | WCB |
| Double head bolt | A3 |
| Bracket bolt | A3 |
Drawing Of Pneumatic Operated Metal Seated Flange Knife Gate Valve:
| GB/T 9113.1 1.0Mpa | |||||||||
| Nominal Diameter | Inch | L | D | D1 | D2 | N-M | b | ●-○ | H |
| DN50 | 2" | 50 | 160 | 125 | 100 | 4-16 | 18 | 2-2 | 300 |
| DN65 | 2-1/2" | 50 | 180 | 145 | 120 | 4-16 | 18 | 2-2 | 310 |
| DN80 | 3" | 50 | 195 | 160 | 135 | 8-16 | 18 | 2-6 | 330 |
| DN100 | 4" | 50 | 215 | 180 | 155 | 8-16 | 18 | 2-6 | 370 |
| DN125 | 5" | 50 | 245 | 210 | 185 | 8-16 | 18 | 2-6 | 410 |
| DN150 | 6" | 60 | 280 | 240 | 210 | 8-20 | 23 | 2-6 | 480 |
| DN200 | 8" | 60 | 335 | 295 | 265 | 8-20 | 23 | 2-6 | 570 |
| DN250 | 10" | 70 | 390 | 350 | 320 | 12-20 | 23 | 4-8 | 720 |
| DN300 | 12" | 80 | 440 | 400 | 368 | 12-20 | 23 | 4-8 | 810 |
| DN350 | 14" | 80 | 500 | 460 | 428 | 16-20 | 23 | 6-10 | 890 |
| DN400 | 16" | 90 | 565 | 515 | 482 | 16-24 | 27 | 6-10 | 1030 |
| DN450 | 18" | 100 | 615 | 565 | 532 | 20-24 | 27 | 8-12 | 1160 |
| DN500 | 20" | 114 | 670 | 620 | 585 | 20-24 | 27 | 8-12 | 1280 |
| DN600 | 24" | 114 | 780 | 725 | 685 | 20-27 | 30 | 8-12 | 1450 |
| Limit switch | |
| Solenoid valve | |
| Filter | |
| Pneumatic actuator | SC |
| Bracket | WCB |
| Piston rod | 2Cr13 |
| Cylindrical pin | A3 |
| Packing gland | WCB |
| Packing | PTFE |
| Valve plate | 201 |
| Valve body | WCB |
| Seat sealing surface | 507 |
| Location point | WCB |
| Double head bolt | A3 |
| Bracket bolt | A3 |
Operating Type Of Knife Gate Valve:
Uni & Bi-directional Of Pneumatic Actuated Knife Gate Valve:
Seat/Sealing Material Of Pneumatic Operated Knife Gate Valve:
Matching Air Accessories Selection For Pneumatic Ball Valve:
Pneumatic Actuator Accessories Options :
| Pneumatic Actuator Accessories Options | ||
| Pneumatic Actuator Pisition | Applicable Connection Standard |
Pneumatic Actuator Accessories |
| Actuator Upper | VDI/VDE 3845 | ● Limit Switch Box ● Proximity Switch ● P/P Pneumatic Positioner ( Control Input Signal Is 0.20-1.03 Bar or 3-15 PSI ) ● E/P Electro Pneumatic Positioner ( Control Input Signal Is 4-20mA ) |
| Actuator Back | VDI/VDE 3845 | Non Explosion-proof Type ExmbIICT4 / EX d IIB T6 / EX d IIC T6 / EX ia IIC T6 Explosion-proof Type ● 3/2 Way Namur Solenoid Valve ( For Spring Return Actuator ) ● 5/2 Way Namur Solenoid Valve ( For Double Acting Actuator ) Air Filter Regulator |
| Actuator Bottom | ISO5211/DIN3337 | ● Declutchable Gear Box ● Ball Valve , Butterfly Valve , Plug Valve |
Single Acting & Double Acting Difference Of Pneumatic Actuator:
| Principle Of Single Acting Pneumatic Actuator (Spring Return) | |
| Counter - Clockwise | Clockwise |
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Air to port A forces the pistons outwards, causing the springs to compress, The pinion turns counterclockwise while air is being exhausted from port B.
Loss of air pressure on port A, the stored energy in the springs forces the pistons inwards. The pinion turns clockwise while air is being exhausted from port A. |
Air to port B forces the pistons outwards, causing the springs to compress, The pinion turns counterclockwise while air is being exhausted from port B.
Loss of air pressure on port A, the stored energy in the springs forces the pistons inwards. The pinion turns clockwise while air is being exhausted from port A. |
| Principle Of Double Acting Pneumatic Actuator | |
| Counter - Clockwise | Clockwise |
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Air to Port A forces the pistons outwards, causing the pinion to turn counterclockwise while the air is being exhausted from Port B.
Air to Port B forces the pistons inwards, causing the pinion to turn clockwise while the air is being exhausted from Port A. |
Air to Port A forces the pistons outwards, causing the pinion to turn clockwise while the air is being exhausted from Port B.
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A1: We are a 29 years professional valve automation integration valve manufacturer, we produce and sale directly from our factory.
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