Stainless Steel Gate Valve
Stainless Steel Gate Valve Manufacturer
MVS Valves’ Stainless Steel Gate Valve is engineered to deliver high-integrity shut-off performance across a wide range of fluid control applications, including water, steam, oil, and chemical services. Manufactured as per ASME and API standards, including API 600 and API 603, these valves offer unmatched corrosion resistance and flow efficiency. Built using materials such as CF8, CF8M, 316 Stainless Steel, and duplex grades, they are available with bolted bonnet or pressure-seal configurations and feature rising stem (OS&Y) operation with flexible wedge or solid wedge designs.
We offer advanced valve configurations like the API 603 Corrosion Resistant Stainless Steel Gate Valve and API 600 Stainless Steel Gate Valve Flanged Ends Class 300, providing a reliable sealing mechanism under varying temperature and pressure conditions. Our corrosion-resistant variants such as API 603 150# CF8M Stainless Steel OS&Y Gate Valve and API 603 Stainless Steel Corrosion-Resistant Gate Valves are ideal for aggressive environments and critical fluid isolation where chemical resistance is a priority.
MVS also manufactures Super Duplex F53 F55 5A 6A Gate Valves Flanged Ends for extreme durability and pressure containment, while our ASTM A 351 GR. CN7M Alloy 20 Bolted Bonnet Rising Stem Gate Valves are widely used in corrosive chemical processes. Designed to withstand Class 150 to Class 600 pressure ratings, these valves are tested according to API 598 standards for leak-tight performance.
For municipal and utility applications, we offer Ductile Iron Flanged Gate Valve Bronze Trim Class 150, Ductile Iron Flanged Gate Valve Stainless Steel Trim Class 150, and Ductile Iron Flanged Gate Valve Aluminium Bronze Trim Class 150, each optimized for long service life and resistance to scaling or wear. Our product range also covers API 600 Cast Carbon Steel Gate Valve Flanged Ends Class 150, ensuring a complete solution for both stainless and carbon steel system requirements.
Precision-engineered Flexible Wedge Outside Screw and Yoke Bolted Bonnet API 600 Gate Valves are part of our standard supply, designed for low-pressure drop and effective sealing in full open or closed positions. Whether it’s a Cast Steel Gate Valve or a specialized duplex model like the API 600 Duplex Steel Gate Valve Flanged End Class 600, every valve is crafted with meticulous attention to quality and performance.
Specification
| Specification | Details |
|---|---|
| Valve Type | Stainless Steel Gate Valve (Rising-stem OS&Y) |
| Size Range | ½″ – 24″ (DN 15 – DN 600) |
| Pressure Class | Class 150–600 (ASME B16.34/B16.5) |
| Standards Compliance | API 600 / API 603 design; ASME B16.34, B16.10, B16.5; API 598 testing |
| Face-to-Face | ASME B16.10 dimensions |
| End Connections | Flanged (RF/RTJ) |
| Shrink Feature | Flexible-wedge design option |
| Packing / Bonnet | Graphite/PTFE; bolted bonnet |
| Operating Media | Water, steam, oil, chemicals |
| Temperature Range | Typically –29 °C to +425 °C (material-dependent) |
Material of Construction
| Body & Bonnet | Cast CF8/CF8M stainless (A351); Duplex stainless | CF3M, Super Duplex, 904L |
| Wedge/Seat | Stainless Steel (CF8/CF8M) | Flexible-wedge (carbon steel core) |
| Stem | 316SS (rising stem) | Alloyed SS or duplex |
| Seat Insert | Metal-to-metal | PTFE, rubber lining (Viton/EPDM) |
| Packing | Graphite gland packing | PTFE or fire-safe materials |
| Bolting | Stainless steel studs/nuts | Alloy or Inconel bolting |
Application Industries
Crude Oil & Natural Gas Industry
Chemical & Petrochemical Industry
Water & Wastewater Treatment
Nuclear & Thermal Power Generation
Food & Beverage Industry
Pharmaceutical & Biotechnology
Pulp & Paper Industry
Mining & Mineral Processing
Marine & Shipbuilding
HVAC & Building Services
Automotive & Paint Chemical Manufacturing
Environmental & Bio Gas Renewable Energy
Steel & Metal Processing
Fertilizer Plants, Polymer Production
Cosmetics & Personal Care
Cement & Construction
Chlor-Alkali Industry
Mineral Acids Industry
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Stainless Steel 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 stainless steel gate valve and how does it work?
A cast stainless gate valve with a rising-stem OS&Y (outside screw and yoke) design. Turning the handwheel raises or lowers a wedge across the bore; fully open, the wedge clears the flow path entirely, so there is almost no pressure drop. Because the stem thread sits outside the body in the yoke, it never touches the media, and the rising stem shows valve position at a glance from across the plant.
Which body, wedge and seat materials are available?
Body and bonnet in cast CF8/CF8M stainless (ASTM A351), with duplex, CF3M, super duplex and 904L on request. Wedge and seat in CF8/CF8M stainless, or flexible-wedge construction with a carbon steel core. Seat inserts metal-to-metal as standard, with PTFE or rubber lining (Viton/EPDM) where a softer, tighter seal is needed. Flexible wedges tolerate thermal distortion better on lines that cycle hot and cold.
What size, pressure class and standards apply?
½″ to 24″ (DN 15 – DN 600) in Class 150 to 600 per ASME B16.34/B16.5, with flanged RF or RTJ ends. MVS is ISO 9001:2015 certified and supplies test certificates with each order.
Why should this valve be kept fully open or fully closed?
A partly open wedge sits in a high-velocity stream, which erodes the wedge edge and the seat faces until the valve can no longer seal shut, and the gate vibrates against its guides. A gate valve is an isolation valve. If you need to regulate flow, use a globe valve, which is built for the duty; if you need fast quarter-turn shut-off instead, use a ball valve.
Are you a manufacturer, and what are your minimum order quantity and customization options?
MVS has manufactured valves at its own works since 1978, is ISO 9001:2015 certified and exports across several continents. The minimum order quantity is 20 pieces. Duplex, super duplex and 904L bodies, flexible wedges, soft seat inserts, gear operators and actuated assemblies are built to order.