Plug Valve

As a Plug Valve Supplier in Dubai, UAE Valves provides isolation valves that operate with a simple quarter-turn action. A solid plug with a port rotates inside the body — when aligned with the pipeline, flow passes; when turned across, flow stops. This compact and versatile design is suitable for clean, viscous, or lightly dirty fluids and is widely applied across oil, gas, water, and power services.

How Plug Valves Work

• Basic Operation: A cylindrical or tapered plug rotates to align the port with the flow path or block it completely.
• Lubricated Plug Valves: Sealant is injected to form a film between the plug and body, ensuring tight sealing in demanding hydrocarbon duties.
• Sleeve-Lined Plug Valves (Non-Lubricated): A sleeve made from high-performance sealing material surrounds the plug, providing bubble-tight shutoff with low torque and eliminating the need for sealant.
• Pressure Balanced Designs: Equalize forces on the plug to reduce friction and operating torque.
• Lift Plug Designs: The plug is lifted from the seat before turning, reducing wear on sticky or high-temperature media.

Benefits

• Tight, repeatable shutoff for dependable isolation
• Handles solids and viscous media due to simple internal design
• Low, steady operating torque suited for manual, gear, or automated drives
• Quarter-turn action for compact layouts and fast cycles
• Top-entry and lift styles enable in-line service for reduced downtime
• Spares and sealant replacement kits available for lifecycle support

Types Offered

• Lubricated Plug Valve – sealant injected to create a pressure-assisted seal in demanding hydrocarbon duty
• Sleeve-Lined Plug Valve (Non-Lubricated) – low-torque, bubble-tight sealing without the need for lubrication
• Jacketed Plug Valve – heating jacket keeps products from solidifying during stops or low flow
• Connection Lift Plug Valve – plug lifts before turning and lowers to seal for sticky or hot media
• Eccentric Plug Valve – offset plug for reduced wear and reliable seating in slurry and wastewater streams
• Three-Way Plug Valve – L or T port configurations for diversion and mixing in compact manifolds
• Twin Seal Plug Valve – two independent seals with a bleed point for verified isolation
• Orbit Plug Valve – rising stem cam action avoids seat rubbing during rotation, ideal for frequent cycling

Industries Served

• Oil & Gas – tank farms, terminals, loading lines, and manifolds
• Pipelines – block valves, meter skids, scraper stations
• Petrochemical & Chemical – process isolation, drains, vents, and corrosive services
• Water & Desalination – intake, product water, and chemical dosing
• Power Generation – fuel gas, condensate, and balance-of-plant isolation
• District Cooling & Utilities – chilled water and network pump isolation

Technical Specifications

• Size Range: DN 15 to DN 1200 (½ in to 48 in)
• Pressure Ratings: ASME Class 150 to 600 for sleeved and eccentric types; Class 150 to 1500 for lubricated and twin-seal designs
• Temperature Range: −46 °C to +400 °C depending on body, trim, and sealing system; higher available with special alloys
• End Connections: flanged RF or RTJ, butt weld, socket weld, threaded for smaller sizes; hubs on request
• Porting: full bore and reduced bore; L or T port on three-way designs
• Leakage Classes: ISO 5208 Rate A or ANSI/FCI VI for sleeve-lined and twin-seal designs when specified
• Actuation: lever, gear, pneumatic, electric, or hydraulic with ISO 5211 mounting

Design Standards

• API 6D – pipeline valves and test scope
• API 599 – steel plug valves in refinery and chemical service
• ASME B16.34 – design and pressure-temperature ratings
• ASME B16.5 and B16.47 – flanges; ASME B16.10 and EN 558 – face-to-face dimensions
• ISO 5208 and EN 12266 – pressure and seat leakage testing
• Fire-safe qualification to API 607 or API 6FA when specified

Inspection and Testing

• Hydrostatic shell and seat tests per API 6D, API 598, or ISO 5208 as applicable
• Functional cycling and torque checks with recorded settings
• Double block and bleed verification on twin-seal configurations
• Fugitive emission testing to ISO 15848 where required
• Helium or nitrogen leak testing for critical services on request
• Third-party inspection available on request
• Serialized test records and EN 10204 3.1 or 3.2 certificates issued with delivery

Body and Trim Material Compatibility

Special Features

• Pressure-balanced and lift mechanisms reduce seating friction in large or high-pressure sizes
• Witness ports and bleed points for verified isolation in twin-seal designs
• Sealant injection and flushing ports for service on dirty or abrasive media
• Top-entry construction enables in-line maintenance on selected sizes
• Anti-blowout stems, antistatic paths, and low-emission packing to ISO 15848
• Lockable levers and gearboxes with positive position indication
• Project-specific coatings and corrosion-resistant overlays for sour or marine exposure
• Customisation available for trims, coatings, actuation, and test documentation to match project requirements