It is a quarter-turn rotary valve that does not require lubrication for operation. It uses a self-lubricating polymer sleeve, elastomeric seals, or a lined interior to provide smooth movement and a tight shutoff.
Non-Lubricated Plug Valve Manufacturers in Mumbai, India
A Non-Lubricated Plug Valve is a quarter-turn rotary valve designed for on-off and throttling applications without the need for lubrication. Unlike lubricated plug valves, these valves use a self-lubricating polymer sleeve, elastomeric seals, or metal-to-metal contact for smooth operation. They are preferred for applications requiring minimal maintenance, contamination-free performance, and extended service life.
Types of Non Lubricated Plug Valve
- Sleeved Plug Valve – Features a PTFE or polymer sleeve to reduce friction and provide bubble-tight sealing.
- Lined Plug Valve – Utilizes a corrosion-resistant lining (PTFE, PFA, or FEP) for handling aggressive chemicals.
- Eccentric Plug Valve – Designed with an offset plug for improved sealing and lower torque operation.
- Expanding Plug Valve – Uses a mechanical expansion mechanism to create a tight, bubble-free seal.
Advantages and Disadvantages
Advantages
✔ Maintenance-Free Design – No need for periodic lubrication, reducing operational costs.
✔ Zero Contamination Risk – Ideal for applications in food, pharmaceuticals, and chemicals.
✔ Superior Corrosion Resistance – Lined and sleeved variants withstand aggressive media.
✔ Lower Torque Requirements – Operates smoothly without excessive force.
✔ Reliable Bubble-Tight Shutoff – Provides excellent sealing performance.
Disadvantages
✖ Limited Pressure and Temperature Ratings – Typically lower than lubricated plug valves.
✖ Not Ideal for High-Torque Applications – Sleeved designs may not handle extreme pressures.
✖ Sleeve or Liner Wear Over Time – Requires periodic replacement in high-cycle applications.
Trusted Non-Lubricated Plug Valve Manufacturers for Industrial Applications
Freture Techno Pvt. Ltd. stands as a leading manufacturer of Non-Lubricated Plug Valves, delivering high-performance, maintenance-free flow control solutions engineered for demanding industrial applications. With a strong focus on quality, reliability, and innovation, the company designs valves that incorporate advanced self-lubricating sleeve technology, ensuring smooth operation, bubble-tight sealing, and extended service life without the need for external lubrication.
Manufactured in compliance with international standards such as API 6D, API 599, and ASME B16.34, Freture’s valves are available in a wide range of materials, sizes, and configurations to suit industries including oil & gas, chemical processing, pharmaceuticals, and water treatment. Backed by stringent testing, customizable designs, and actuator-ready options, Freture Techno Pvt. Ltd. continues to be a trusted partner for clients seeking durable, corrosion-resistant, and cost-effective valve solutions.
Specifications | Features |
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Type : Non-Lubricated Plug Valve End Connection: Flanged, Threaded (BSP/NPT), Socket Weld, Butt Weld Size: ½” to 24” Pressure Rating: ANSI Class 150, 300, 600 Temperature Range: -50°C to 250°C MOC (Material of Construction): Carbon Steel (WCB, LCB), Stainless Steel (CF8, CF8M), Duplex, Super Duplex, PTFE/PFA Lined Design Standard: API 6D, API 599, ASME B16.34, BS 5353 Cycle Life: High cycle life with minimal wear Face to Face: As per ASME B16.10 and API 6D Operation: Manual (Lever/Gear), Pneumatic Actuator, Electric Actuator Fire Safe Design: API 607 / API 6FA Compliant (for metal-seated variants) Testing: Hydrostatic and Pneumatic Testing as per API 598 / API 6D Documents: Material Test Certificate (MTC), Pressure Test Report, Fire Safe Test Report, PMI Report, IBR & Third-Party Inspection Certificate
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FAQ’s
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- What is a Non-Lubricated Plug Valve?
- How does these Plug Valve work?
The valve has a tapered or cylindrical plug with a flow passage. When rotated 90 degrees, the passage aligns with the pipeline for flow or blocks it to stop flow. The self-lubricating design ensures low friction and smooth operation.
- What are the benefits of using these Plug Valve?
✔ Maintenance-Free – No need for periodic lubrication.
✔ Leak-Tight Sealing – Provides excellent shutoff performance.
✔ Corrosion Resistance – Lined and sleeved options handle aggressive fluids.
✔ Compact and Lightweight – Easy to install and operate.
✔ Ideal for Clean Environments – Used in food, pharmaceuticals, and chemicals. - What materials are used for these Plug Valves?
Common materials include carbon steel (WCB, LCB), stainless steel (CF8, CF8M), duplex steel, and PTFE/PFA/FEP lining for enhanced chemical resistance.
- How does a Non-Lubricated Plug Valve compare to a Lubricated Plug Valve?
- Non-Lubricated Plug Valve – Maintenance-free, suitable for clean environments, and corrosion-resistant.
- Lubricated Plug Valve – Requires periodic lubrication but handles higher pressure and temperature applications.
- Can these Plug Valve be automated?
Yes, these valves can be fitted with pneumatic, electric, or hydraulic actuators for remote and automated operation.
- How are these plug valves tested for quality?
Testing is performed as per API 598 and API 6D, including hydrostatic, pneumatic, and fire-safe testing, to ensure performance and reliability.
- Are these Plug valves suitable for high-pressure applications?
They are generally recommended for low to medium-pressure applications. For high-pressure systems, lubricated plug valves may be preferred.
Industries where Non-Lubricated Plug Valve is Used
Pharmaceutical Industry
Wastewater Treatment
Food and Beverage
Oil and Refinery
Power Generation
Application
- Chemical Processing – Suitable for handling corrosive and aggressive fluids.
- Pharmaceutical Industry – Ideal for contamination-free fluid control.
- Water and Wastewater Treatment – Used in flow regulation and isolation.
- Food and Beverage Industry – Meets hygiene and safety standards.
- Oil & Gas Sector – Deployed in low-pressure gas distribution.
- Power Plants – Controls steam and cooling water systems.
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