Lined Knife Gate Valve
When your industrial fluid system handles highly corrosive, abrasive, or slurry media, you need valves that provide maximum protection and long service life. Designed for chemical, wastewater, and abrasive media, our lined knife gate valves deliver reliable isolation and operational efficiency.
TOT lined knife gate valves feature a blade-shaped gate that moves perpendicular to the flow, designed to handle aggressive liquids, slurries, powders, and corrosive chemicals.
Lined knife gate valves are characterized by a sharp gate with a corrosion- and abrasion-resistant lining that protects the valve body, ensuring long-lasting performance and tight shut-off even in the harshest environments.
Made with high-quality stainless steel or carbon steel bodies and reinforced with PTFE, rubber (EPDM/NBR), or ceramic linings, these valves provide outstanding chemical resistance, abrasion resistance, and durability.
Full Lined Body & Gate: The entire wetted path is protected with lining materials for maximum corrosion and wear resistance.
Customizable for Your Flow System: Face-to-face dimensions, flanges, actuators — fully adapted to your project needs.
Factory-Tested Before Delivery: Every valve undergoes hydrostatic and seat testing to meet international standards.
API 6D, CE, and ISO Certified Manufacturing: Ensuring professional quality and global compliance.
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Let’s Help You Specify the Right Knife Gate Valve
Be careful when choosing a new valve supplier, the disappointment of poor quality can last much longer than the joy of a low price!
Lined Knife Gate Valve Data Sheet
| Parameter | Details |
|---|---|
| Body Material | Stainless Steel (SS304/SS316) / Carbon Steel |
| Gate Material | Stainless Steel / Carbon Steel |
| Lining Material | PTFE, Rubber (EPDM / NBR), Ceramic |
| Seat Options | EPDM, PTFE, Metal Seat |
| Packing | PTFE, Graphite, Braided Aramid |
| Pressure Rating | PN10 / PN16 / ANSI 150 |
| Face-to-Face | Customizable |
| Connection | Wafer / Lug / Flanged |
| Actuation | Manual, Pneumatic, Electric |
Material Comparison: Lined vs. Stainless Steel vs. Carbon Steel
| Feature | Lined Knife Gate | Stainless Steel | Carbon Steel |
|---|---|---|---|
| Corrosion Resistance | Excellent (PTFE, Rubber, Ceramic) | Very good | Poor without coating |
| Abrasion Resistance | High (ceramic/rubber) | Moderate | Moderate |
| Strength | Medium-High | Medium | Medium |
| Cost | Medium-High | Medium | Low |
| Weight | Medium | Medium | Medium |
| Ideal Media | Corrosive, abrasive, slurry | Corrosive + semi-abrasive | Neutral + clean fluids |
| Common Applications | Chemical, wastewater, slurry pipelines | Food & beverage, pulp & paper | Water, oil, general purpose |
| Availability (Lead Time) | Medium | Fast | Fast |
Kind Tips: For chemical and abrasive media, lined knife gate valves provide superior protection and longer service life than standard stainless steel or carbon steel valves.
Why Choose Lined Knife Gate Valves?
In harsh media environments, lined knife gate valves prevent corrosion, erosion, and clogging:
Corrosion-Resistant: Lined body and gate protect against acids, alkalis, and aggressive chemicals.
Abrasion-Resistant: Rubber or ceramic linings handle slurry, ash, and abrasive particles.
Low Maintenance, High Reliability: Lined construction reduces downtime and maintenance.
Tough Media Handling: Slurries, powders, viscous fluids, and fibrous materials are cut and sealed efficiently.
How Our Lined Knife Gate Valves Are Built for Performance
Full Bore Flow: Smooth flow with minimal pressure drop.
Reliable Shut-Off: Sharp gate and lining provide tight sealing.
Corrosion- & Abrasion-Resistant: Lining protects valve from chemical and abrasive wear.
Multiple Actuation Options:
Manual (Handwheel / Chainwheel)
Pneumatic Cylinder
Electric Actuator
Resilient Seat Options: EPDM, PTFE, or metal seats for bubble-tight or rugged sealing.
Zero Leakage to Atmosphere: Gland packing, O-rings, and scraper rings ensure tight sealing.
Available Sizes & Pressure Ratings
Size Range: DN50–DN1200 (2″–48″)
Pressure Class: PN10 / ANSI 150 / custom available
Temperature Range: Up to 200°C depending on lining and seat material
Applications You Can Trust It In
Chemical Industry: Acid and alkali pipelines, chemical processing.
Wastewater Treatment: Sludge and slurry handling.
Mining & Minerals: Abrasive slurry pipelines.
Pulp & Paper: Fibrous stock and chemical slurries.
Food & Beverage: Chemical-resistant and clean-in-place applications.
Power Plants: Ash-laden and chemical-laden fluids.
Optional Features for Enhanced Performance
Purge Ports: Flush sticky or viscous media
Position Indicator: Remote operation feedback
Extended Stem / Gearbox: For deep or remote installations
Dust Covers & Scrapers: Prevent buildup on gate and sealing surfaces
* We are not just providing simple quotes but experts in selection, calculation, and drawing.
FAQ-Lined Knife Gate Valve
A valve with a corrosion- and abrasion-resistant lining, designed to handle aggressive, abrasive, or slurry media.
Acids, alkalis, slurry, powders, viscous fluids, and abrasive chemicals.
The blade gate moves perpendicular to the flow, cutting through media while the lining protects the valve body.
Yes — manual, pneumatic, and electric actuators are available.
Select based on media type, pressure, temperature, and lining material. TOT can provide customized guidance.
Periodic inspection and cleaning of the gate and lining are recommended.
