Metal-seated Plug Valves

Engineered for the most severe operating environments, Frigate’s metal-seated plug valves deliver uncompromising bi-directional shutoff under extreme temperatures and high pressures. Their robust, cavity-free design ensures continuous reliability and zero leakage when handling highly abrasive slurries, scaling media, and corrosive chemicals.

Nominal Diameter Range

1/2″ to 24″ (DN15 to DN600)

Pressure Ratings

ASME Class 150 / 300 / 600 / 900 / 1500

Operating Temperature Range

-29°C to +538°C (-20°F to +1000°F)

Body Materials

WCB, LCB, CF8, CF8M, CF3M, Duplex SS, Super Duplex, Inconel

Plug Materials

A105, F304, F316, F51 + Hard Facing (Stellite, WC Coating)

*Listed timeframes are indicative ranges based on current material availability; firm schedules are finalized upon technical review and PO confirmation.

Product Description

This metal-seated plug valve utilizes an advanced metal-to-metal sealing mechanism enhanced with ultra-hard coatings to withstand severe geometric wear and thermal shock. Its robust, self-cleaning structural design inherently sweeps away particulate accumulation, eliminating internal clogging and dramatically extending operational lifecycles in heavy industrial processes.

Seat Material

Integral Metal-to-Metal Seat with Tungsten/Chromium Carbide Coating

End Connections

Flanged (RF, RTJ), Butt-Weld (BW), Socket-Weld (SW)

Design Standards

API 599, API 6D, ASME B16.34

Face-to-Face Dimensions

ASME B16.10, API 6D

Testing & Inspection

API 598, API 6D (Zero-leakage option available)

Fire Safety Certification

API 607 / ISO 10497 Certified

Fugitive Emissions

ISO 15848-1 Class A / BH Certified

Flow Characteristic

Linear / Equal Percentage modified

Operation Methods

Manual Lever, Worm Gear, Pneumatic, Electric, Hydraulic Actuation

Applicable Media

Catalyst Slurries, Tailings, Fly Ash, Crude Oil, High-Temp Steam

Technical Advantages

The continuous mechanical wiping action of the hard-faced plug against the metal seat prevents solids from entering the sealing area, ensuring consistent zero-leakage performance in severe slurry applications. Additionally, its robust single-piece design eliminates internal cavities where stagnant media could crystallize or settle, effectively preventing mechanical seizure and minimizing maintenance downtime.

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Industry Applications

Oil & Gas Refining

Engineered for delayed coking, catalytic cracking, and hydroprocessing units where high-temperature hydrocarbons and catalyst fines quickly degrade conventional soft-seated valves.

Mining & Mineral Processing

Dependable performance in high-density tailings lines, autoclaves, and mineral slurry transport systems where extreme abrasion and heavy grit are constantly present.

Chemical Petrochemical

Provides reliable isolation for aggressive chemical processes, polymer production, and highly corrosive acids that cause rapid chemical degradation of standard seals.

Power Generation

Optimized for high-pressure steam isolation, boiler blowdown systems, and fly ash handling lines, handling severe thermal cycling without losing sealing integrity.

Pulp & Paper Mills

Excels in black liquor processing and chemical recovery lines, where high solids concentration, cooking liquors, and fibrous media easily clog standard valves.

Wastewater & Sludge

Designed for heavy sludge handling and abrasive grit chamber processing, ensuring continuous clog-free operation and positive isolation in municipal treatment plants.

Frigate Approved Quality Management System

At Frigate, quality is built into every stage of manufacturing. Our approved Quality Management System ensures that every material component.

Incoming Material Checking

Before production begins, all incoming materials are checked against specifications, drawings, and supplier documents.

In-Process Inspection

Quality is monitored during manufacturing to prevent defects and maintain process consistency.

Final Dimensional Checking

Finished parts are inspected before dispatch to confirm compliance with customer drawings and tolerances.

Packaging Control

Finished components are packed safely to prevent damage during handling and transportation.

Incoming Material Checking

In-Process Inspection

Final Dimensional Checking

Packaging Control

Quality Document

To help buyers evaluate our quality systems, we provide sample documents that reflect our inspection and reporting standards.

How We Delivered

Complex geometries engineered solutions that move businesses forward.

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Units Manufactured Monthly

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Cost savings

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Flange Assembly for Pump

Faster Production

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Having Doubts? Our FAQ

How does a metal-seated plug valve prevent mechanical seizure under high-temperature expansion?

To accommodate thermal expansion without jamming, these valves are engineered with precise clearances and utilize high-velocity oxygen fuel (HVOF) applied coatings, such as tungsten carbide, which match the thermal expansion coefficients of the body and plug materials.

What makes this design superior to a metal-seated ball valve in high-concentration slurry applications?

Unlike ball valves that feature large, recessed internal cavities where solids settle, compress, and seize the trim, the plug valve features a cavity-free geometry that continuously displaces particulate matter away from the sealing faces during rotation.

Can these valves achieve true zero-leakage performance under severe conditions?

Yes, when manufactured with precision lapped metal-to-metal seats and specialized hard-facing coatings, our valves can be certified to meet API 598 or ISO 5208 Rate A (zero visible leakage) requirements for severe-service isolation.

What manual torque considerations should be factored into automation selection?

Metal-to-metal friction yields higher operating torque than soft-seated configurations; therefore, Frigate recommends heavy-duty worm gears for manual operation or high-output pneumatic/electric actuators sized with a minimum 30% safety factor.

What hard-facing options are recommended for highly corrosive versus highly abrasive media?

For pure mechanical abrasion and erosion, tungsten carbide (WC) or chromium carbide coatings are ideal, whereas Stellite or specialized cobalt-based alloys are deployed when the application demands simultaneous resistance to chemical corrosion and high temperatures.

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LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Other Locations

GENERAL ENQUIRIES

LOCATIONS

Registered Office

10-A, First Floor, V.V Complex, Prakash Nagar, Thiruverumbur, Trichy-620013, Tamil Nadu, India.

Operations Office

9/1, Poonthottam Nagar, Ramanandha Nagar, Saravanampatti, Coimbatore-641035, Tamil Nadu, India. ㅤ

Components Built for Critical Performance

Engineered Products for Critical Applications

Metal-seated Plug Valves

Product Description

Seat Material

End Connections

Design Standards

Face-to-Face Dimensions

Testing & Inspection

Fire Safety Certification

Fugitive Emissions

Flow Characteristic

Operation Methods

Applicable Media

Technical Advantages

Let's Get Started

Industry Applications

Frigate Approved Quality Management System

Quality Document

How We Delivered

Having Doubts? Our FAQ

We'd love to Manufacture for you!

LOCATIONS

Registered Office

Operations Office

Other Locations

GENERAL ENQUIRIES

LOCATIONS

Registered Office

Operations Office

Other Locations

GENERAL ENQUIRIES

Get Your Quote Now

Metal-seated Plug Valves

Get Latest Price

Metal-seated Plug Valves

Get Latest Price