Types of Plug Valves & Symbols – Best Main Plug Valve Supplier in Delhi
Plug valves are essential flow control devices used across industries for their quick shutoff capability, compact design, and ease of operation. Known for their low maintenance and tight sealing, plug valves come in several types suited for various applications including gas, oil, water, and chemical pipelines.
As a reputed plug main valve manufacturer and supplier in Delhi, Udhhyog offers a wide range of lubricated, non-lubricated, and special-purpose plug valves to meet diverse industrial needs.
In this article, we explore the types of plug valves, their symbols, and the difference between plug and ball valves, along with supplier insights and pricing.
What is a Plug Valve?
A plug valve is a quarter-turn rotary valve that uses a cylindrical or conical plug to control the flow of fluid. The plug has a passage through it that allows fluid to pass when aligned with the pipe. When the plug is rotated 90°, it blocks the flow.
These valves are known for:
Fast operation
Compact design
Reliable sealing
Versatile applications
Types of Plug Valves
🔹 1. Lubricated Plug Valve
Uses a sealing lubricant injected into a cavity.
Suitable for high-pressure and high-temperature services.
Common in oil and gas pipelines.
🔹 2. Non-Lubricated Plug Valve
Uses sleeves of Teflon or elastomer to reduce friction.
Maintenance-free, ideal for low-pressure applications.
🔹 3. Eccentric Plug Valve
Has an off-center plug and non-metallic seat.
Offers tight shutoff and is used in wastewater and slurries.
🔹 4. Expanding Plug Valve
Two-piece plug design.
Provides double block and bleed function.
Used in petrochemical and terminal systems.
🔹 5. Multi-Port Plug Valve
3-way or 4-way valves for diverting flow.
Compact solution for manifold systems.
Plug Valve Symbol
The standard P&ID symbol for a plug valve typically shows:
A straight line (representing the pipe)
A square or rectangle with a central circle or dot (representing the plug)
Arrows may be added to indicate flow direction
Plug valve symbols are crucial in engineering drawings and installation plans.
Plug Valve vs Ball Valve – Key Differences
FeaturePlug ValveBall ValveClosure MechanismCylindrical or tapered plugSpherical ballFlow PassageStraight or multi-portFull bore or reduced boreSealingLubricated/sleevedSoft or metal seatMaintenanceEasy; may need lubricationMinimalSize RangeWide; compactSlightly bulkierTypical UseOil, gas, wastewater, chemicalsWater, HVAC, general services
✅ Use plug valves when durability, tight sealing, or multi-directional flow is needed. ✅ Use ball valves for quick shutoff with minimal pressure drop.
Where Are Plug Valves Used?
🛢️ Oil & gas transportation
🏭 Chemical processing plants
🚰 Water treatment facilities
🧪 Pharmaceutical systems
🔥 Petrochemical and power plants
🚧 Slurry and abrasive material lines
Plug Valve Materials & Sizes at Udhhyog
We manufacture plug valves in:
Cast Iron (CI)
Ductile Iron (DI)
Carbon Steel (WCB)
Stainless Steel (SS 304/316)
Bronze or Gunmetal
Size Range:
15 mm to 300 mm
Pressure ratings: PN10, PN16, PN25, ANSI 150/300
Plug Valve Price List – Delhi Market
TypeSize (mm)MaterialPrice Range (INR)Lubricated Plug Valve25–200CI/WCB₹1,800 – ₹12,000Non-Lubricated Plug15–100CI/SS₹1,200 – ₹6,000Eccentric Plug Valve50–300DI/WCB₹4,000 – ₹18,000Expanding Plug Valve50–200WCB/SS₹8,000 – ₹25,000Multi-Port Plug Valve25–150Bronze/SS₹5,000 – ₹15,000
📌 Prices vary by material, end connection, pressure rating, and coating. Contact Udhhyog for project quotations.
Why Choose Udhhyog – Best Plug Main Valve Supplier in Delhi
🏭 Manufacturing Strength
In-house production with machining, assembly, and pressure testing facilities.
📦 Extensive Product Range
Full catalog of plug valves with options for customization and coating.
📈 Delivery & Support
Serving Delhi and surrounding states – Punjab, Haryana, UP, Rajasthan, J&K.
💬 Expert Guidance
Support for valve selection, sizing, and technical documentation.
💰 Affordable Pricing & Bulk Supply
Competitive pricing for distributors, OEMs, and infrastructure projects.
Conclusion
Plug valves are versatile, reliable, and essential in various industrial pipelines for tight shutoff and flow diversion. With multiple types like lubricated, eccentric, expanding, and multi-port, choosing the right plug valve is key to system efficiency.
Trust Udhhyog, Delhi’s top plug main valve manufacturer and supplier, for quality products, fair pricing, and professional support.
Contact Udhhyog Today
📞 Call or Visit Udhhyog Website for product catalogs, quotes, and expert consultation.
