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Plug Valve

Lined Plug Valve

Lined plug valves are industrial valves designed with a cylindrical or tapered plug that rotates within the valve body to control the flow of liquids or gases.


Plug Valve - Lined
Size Range

1/2" – 8 NPS, DN15 - DN200

Body Materials

Alloy Steel, Stainless Steel, Carbon Steel

Temperature Range

-20°F to 250°F (-29°C to 121°C)

Stem Materials

Stainless Steel

Maximum Allowable Operating Pressure


Lining Materials


Shutoff Rating

Bidirectional Bubble-tight

Plug Materials

Alloy Steel, Stainless Steel, Carbon Steel

Body Style

Flanged End

Design Standard

API 599

Flange Drilling

ASME 16.5 Table D, E, F, DIN PN 10, JIS 10K

Testing Standard

EN 12266- 1

Spark Test

20 KV

Face To Face

ASME 16.10


Corrosive or Abrasive fluids, Speciality Chemicals

Features & Benefits

Lined plug valves offer several features and benefits due to their design and the materials used:
  1. Corrosion Resistance: The primary benefit of lined plug valves is their exceptional resistance to corrosion. The lining material, typically PTFE or similar fluoropolymers, protects the valve internals from corrosive fluids, acids, and chemicals.

  2. Smooth Operation: The lining provides a low-friction surface, allowing the plug to rotate smoothly within the valve body. This ensures easy operation and minimal torque required for turning the valve.

  3. Sealing Integrity: Lined plug valves are known for their reliable sealing performance. The lining material forms a tight seal against the plug and the valve body, preventing leakage even under high pressures.

  4. Chemical Compatibility: They are suitable for handling a wide range of aggressive chemicals and fluids without degradation or contamination, making them ideal for industries such as chemical processing, petrochemicals, and pharmaceuticals.

  5. Longevity and Durability: The combination of a robust metal valve body and the corrosion-resistant lining enhances the overall durability and lifespan of the valve, reducing maintenance and replacement costs over time.

  6. Versatility: Lined plug valves are versatile and can be used in various applications where reliable flow control and chemical resistance are essential, including high-purity water systems, food processing, and wastewater treatment.

  7. Temperature Resistance: They can operate effectively across a broad range of temperatures, depending on the specific lining material chosen, making them suitable for both hot and cold fluid handling applications.

  8. Reduced Maintenance: With minimal wear and excellent chemical resistance, lined plug valves typically require less frequent maintenance compared to unlined valves in corrosive environments.

Overall, lined plug valves are favored for their ability to withstand harsh conditions, maintain sealing integrity, and provide reliable performance in critical industrial applications where safety and efficiency are paramount.


Lined plug valves are used in industries such as chemical processing, petrochemicals, pharmaceuticals, wastewater treatment, and any other application where resistance to corrosion and chemical compatibility are critical.

Lined plug valves offer several benefits, including excellent corrosion resistance, smooth operation due to low friction lining, reliable sealing performance, suitability for handling aggressive chemicals, durability, and reduced maintenance needs compared to unlined valves in corrosive environments.

Maintenance of lined plug valves involves periodic inspection of the lining for signs of wear or damage, checking the sealing integrity, and ensuring proper lubrication of moving parts. Cleaning with compatible solvents may be necessary to remove any residue or buildup.

Lined plug valves are available in various sizes ranging from small sizes suitable for laboratory applications to larger sizes for industrial use. Pressure ratings can vary depending on the design and construction materials, typically ranging from ANSI Class 150 to 600 and higher.

Yes, lined plug valves can be designed to withstand high temperatures depending on the lining material used. PTFE and other fluoropolymers can typically handle temperatures up to 200°C (392°F) or higher, making them suitable for a range of temperature conditions.