Direct answer · Updated July 2026
What air pressure is required for the pneumatic cylinder?
Standard double-acting cylinders operate at 4–7 bar (60–100 psi) filtered plant air. Supply FRL set point and line size on your RFQ for sizing confirmation.
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Applications
Mining & Tailings
Isolation and line breaking on abrasive slurry, concentrate, and tailings pipelines.
Pulp & Paper
Black liquor, stock, and fibre slurry shut-off with minimal clogging.
Wastewater & Sewage
Raw sewage, grit, and biosolids handling in municipal and industrial plants.
Ash Handling & Power
Fly ash, bottom ash, and FGD slurry isolation in power and cement plants.
Cement & Bulk Solids
Powder, clinker, and pneumatic conveying line isolation.
Chemical Slurry
Viscous, solids-laden, and corrosive process media with SS316 or alloy options.
Complete Knife Edge Gate Valve Range
Flow in one direction — wafer/lug, slurry & pulp service
Shut-off from either direction — self-sealing option
Stellite / SS seat for abrasive ash, dry solids & high temp
EPDM, PTFE, Viton — bubble-tight Class VI closure
Double-acting cylinder, solenoid, limit switches, FRL
Technical Standards
Special Features & Options
- Fail-last or fail-safe spring return option
- 24V DC / 110V AC / 220V AC solenoid
- Namur solenoid valve with manual override
- Open/close position indication for SCADA/DCS
- Stainless steel cylinder rod for corrosive areas
- Soft seated or metal seated valve body
- Uni-directional and bi-directional valve options
- Single-acting spring return for fail-close
Material of Construction
| Part No. | Part Name | Material / Standard |
|---|---|---|
| 01 | Knife Gate Valve | MSS SP-81 uni/bi-directional body |
| 02 | Gate / Seat | Soft or metal seated per service |
| 03 | Pneumatic Cylinder | Double-acting ISO 15552 / tie-rod |
| 04 | Solenoid Valve | 5/2 way, 24V DC / 110V AC |
| 05 | Limit Switches | Proximity or mechanical open/close |
| 06 | FRL Unit | Filter-Regulator-Lubricator assembly |
| 07 | Mounting Bracket | ISO 5211 direct mount |
| 08 | Air Supply | 4–7 bar plant air (specify on RFQ) |
Also available: Electric actuator (rotary/modulating), hydraulic cylinder for high-pressure mining, flameproof solenoid for hazardous areas.
Request Knife Edge Gate Valve Quote
Send valve type (uni/bi-directional, seat type), size DN, end connection, actuation (manual/pneumatic), quantity, and application. Engineering response within 24 hours.
Or call +91 97732 78770 · info@supremevalves.in
Frequently Asked Questions
What air pressure is required for the pneumatic cylinder?
Standard double-acting cylinders operate at 4–7 bar (60–100 psi) filtered plant air. Supply FRL set point and line size on your RFQ for sizing confirmation.
Can you supply fail-close on air failure?
Yes. Single-acting spring-return cylinders fail-close (or fail-open per spec) on loss of air. Double-acting with stored air tank is also available.
Is the pneumatic package suitable for pulp mill DCS?
Yes. Packages include 24V DC solenoid and dry contact limit switches for PLC/DCS integration. Specify protocol (4–20 mA positioner) if modulating control is needed.
What valve sizes can be pneumatically actuated?
DN50 to DN600 standard with direct-mount cylinders. Larger sizes use scotch-yoke or rack-and-pinion actuators — quote on enquiry.