The Largest Diaphragm & Ball Valve Exporter Since 1978, an ISO 9001:2015 Certified

Knife Gate Valve

Knife Gate Valve Manufacturer

The Knife Gate Valve manufactured by MVS is a highly efficient flow control solution, engineered specifically for handling thick fluids, slurries, and solid-laden media across various industrial processes. Designed with precision, our stainless steel knife gate valves are available in both lugged and flanged end connections, ensuring flexibility in installation and secure, leak-proof performance. Covering a broad size range from 50 mm to 2500 mm and built to handle Class 150 pressure ratings, these valves offer dependable operation even under the most demanding conditions.

MVS offers Knife Gate Valves in both unidirectional and bidirectional configurations, with seat options that include metal and resilient materials for optimal sealing. With a complete material selection, we manufacture carbon steel unidirectional knife gate valve semi lug type and carbon steel unidirectional knife gate valve full lug type for general applications, along with stainless steel unidirectional knife gate valve semi lug type and stainless steel unidirectional knife gate valve full lug type for environments requiring corrosion resistance. Higher-grade materials like SS 304 CF8 unidirectional knife gate valve semi lug type, SS 304 CF8 unidirectional knife gate valve full lug type, SS 316 CF8M unidirectional knife gate valve semi lug type, and SS 316 CF8M unidirectional knife gate valve full lug type offer additional protection in chemically aggressive and high-pressure environments. For even more demanding conditions, our lineup includes duplex steel unidirectional knife gate valve semi lug type and duplex steel unidirectional knife gate valve full lug type, as well as super duplex steel unidirectional knife gate valve semi lug type and super duplex steel unidirectional knife gate valve full lug type, delivering unmatched strength and durability.

To serve a variety of utility and industrial sectors, MVS also manufactures cast ductile iron unidirectional knife gate valve semi lug type and cast ductile iron unidirectional knife gate valve full lug type, ideal for medium-pressure systems where mechanical integrity and cost-effectiveness must coexist.

At MVS, each Knife Gate Valve we deliver is more than just a component; it is a high-performance solution crafted with quality materials, engineered for rugged environments, and tested to meet exacting industrial standards. Whether for manual or automated operations, our valves ensure dependable shut-off and optimum flow control in every use.

Specification

SpecificationDetails
Valve DesignKnife Gate – Uni Directional
Available SizesDN 50 to DN 600 (Above on Request)
Pressure RangeClass 150#
End ConnectionsWafer, Lugged, Flanged types
Face-to-FaceManufacturer’s standard / MSS-SP-81 for lugged
Sealing SystemTwinPack (standard), WhitePack (optional)
Optional FeaturesChain Wheel Operated, Hand Lever Operated

Material of Construction

Valve BodyEN 1.4408 Stainless Steel, EN 5.3105 Ductile IronEN 1.4470 Duplex, Titanium B265, Hastelloy C276, 254 SMO
Gate/BladeEN 1.4404 / 1.4301 SS with beveled edgeDuplex EN 1.4462, Titanium, Polished/Coated Chrome
Seat InsertPTFE, NBR, EPDM, PolyurethaneFDA PTFE, Stainless Metal Seat, EC 1935/2004 Compliant
Packing SystemTwinPack Graphite/PTFE blendWhitePack with PTFE Scraper, Pure Graphite

Application Industries

oil-gas-industry
Crude Oil & Natural Gas Industry
chemical-processing
Chemical & Petrochemical Industry
water-treatment-filtration-industry
Water & Wastewater Treatment
power-generation-industry
Nuclear & Thermal Power Generation
food-and-beverage-industry
Food & Beverage Industry
pharmaceutical-industry
Pharmaceutical & Biotechnology
pulp-and-paper-industry
Pulp & Paper Industry
mining-mineral-industry
Mining & Mineral Processing
marine-shipbuilding-insutry
Marine & Shipbuilding
hvac-building-services
HVAC & Building Services
automotive-paint-chemical-manufacturing
Automotive & Paint Chemical Manufacturing
environmental-bio-gas-renewable-energy
Environmental & Bio Gas Renewable Energy
steel-metal-processing
Steel & Metal Processing
fertilizer-plants-polymer-production
Fertilizer Plants, Polymer Production
cosmetics-personal-care
Cosmetics & Personal Care
cement-construction
Cement & Construction
chlor-alkali-industry
Chlor-Alkali Industry
mineral-acids-industry
Mineral Acids Industry

Related Valves

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Knife Gate Valve

Frequently Asked Questions

Can’t find your duty condition here? Send us the media, size, pressure and temperature and we will specify the valve. Contact us

What is a knife gate valve and how does it work?

A knife gate valve drives a thin, sharpened gate straight across the flow, cutting through whatever the line carries. The body is deliberately short and the seat is a soft insert rather than a machined metal pocket, so there is nowhere for solids to pack. That is what separates it from a conventional gate valve — it is built for slurry, fibre and settled solids rather than for clean liquid at pressure.

Which body, gate and seat materials are available?

Body in EN 1.4408 stainless steel or EN 5.3105 ductile iron, with EN 1.4470 duplex, Titanium B265 and Hastelloy available for aggressive duty. Seat inserts in PTFE, NBR, EPDM or polyurethane, plus FDA-grade PTFE and EC 1935/2004 compliant options for food contact, and a stainless metal seat where temperature or abrasion rules out an elastomer.

What size and end connections are available?

DN 50 to DN 600 as standard, with larger sizes on request, in wafer, lugged and flanged end styles. Wafer is lightest and cheapest; lugged lets you remove downstream pipework while the valve holds; flanged is used where the valve must carry pipe loads. MVS is ISO 9001:2015 certified.

Is it unidirectional, and does installation direction matter?

Yes on both counts. The standard resilient-seated design seals against flow in one direction only, and the body carries an arrow showing which. Fitting one backwards is a common and expensive mistake because it will pass media past the gate. Bidirectional designs are available where the line can reverse — state the requirement at enquiry so the correct body and seat are supplied.

Are you a manufacturer, and what are your minimum order quantity and customization options?

MVS manufactures at its own works — since 1978, ISO 9001:2015 certified — and exports across several continents. The minimum order quantity is 20 pieces. Sizes above DN 600, duplex, titanium and Hastelloy bodies, FDA-compliant seats and bidirectional designs are built to order. For automated points see the Pneumatic Knife Gate Valve.

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