Non-Lubricated Plug Valve

Corrosion
Resistant

Leak Tight
Sealing

Automated
Operation

Low Maintenance
Long Life

Alis Valves is a leading manufacturer of Non-Lubricated Plug Valve Manufacturer Supplier in India designed for reliable and maintenance-free flow control in corrosive and clean service applications. Unlike lubricated types, these valves use a PTFE or polymer sleeve/lining to provide sealing and reduce friction, eliminating the need for external lubrication. This design ensures bubble-tight shut-off, smooth operation, and long service life even in aggressive chemical environments.

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Product Specifications and Overview

Size Range

DN 15 to DN 300

Pressure Rating

PN 10 to PN 40

Body Material

Cast Iron / Ductile Iron / Carbon Steel / Stainless Steel

Sleeve Material

PTFE / FEP / PFA

Plug Material

SS304 / SS316 / Alloy Steel

Operation

Manual / Gear / Pneumatic / Electric

End Connection

Flanged

Temperature Range

-20°C to +200°C (Depends on Lining)

Leakage

Bubble Tight Shut-Off

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Industries Served

Cement

Engineered valve solutions tailored for critical Cement operating processes.

Chemical

Engineered valve solutions tailored for critical Chemical operating processes.

Data centres

Engineered valve solutions tailored for critical Data centres operating processes.

Fertilizer

Engineered valve solutions tailored for critical Fertilizer operating processes.

Applications

Ammonia

High-performance flow automation engineered for Ammonia operations.

CO₂

High-performance flow automation engineered for CO₂ operations.

Compressed Air

High-performance flow automation engineered for Compressed Air operations.

Cryogenic

High-performance flow automation engineered for Cryogenic operations.

Frequently Ask Questions

What Is a Non-Lubricated Plug Valve?

A Non-Lubricated Plug Valve is a plug-type isolation valve that uses a PTFE or polymer sleeve/lining instead of external lubricant to reduce friction and provide sealing between the plug and valve body.

Why Does a Non-Lubricated Plug Valve Not Require Lubrication?

The valve uses a PTFE, FEP or PFA sleeve/lining to provide low-friction operation and sealing. Therefore, conventional external plug lubrication is not required.

Who Is a Non-Lubricated Plug Valve Manufacturer in India?

Alis Valves is a Non-Lubricated Plug Valve manufacturer and supplier in India, offering polymer-lined plug valves for corrosive, clean and demanding industrial applications, with PTFE, FEP and PFA lining options, DN15–DN300 sizes and PN10–PN40 pressure ratings.

How Does a Non-Lubricated Plug Valve Work?

The plug rotates inside a polymer-lined or sleeved body. When the plug's passage aligns with the pipeline, the valve is open. Rotating the plug to the closed position blocks the flow and provides isolation.

Which Is Better: Lubricated or Non-Lubricated Plug Valve?

Neither is universally better. Non-lubricated plug valves are particularly attractive for corrosive, clean and low-maintenance applications, while lubricated plug valves can be advantageous in certain high-pressure and demanding isolation services. The choice should be based on the media, pressure, temperature, corrosion requirements and maintenance philosophy.