Laminar Pte Ltd Singapore

Laminar Pte Ltd


(Eccentric) Plug Valves

Group 1 1
Group 1 1


Eccentric plug valves are pivotal in diverse industries due to their unique design and versatile functionality. These components, also known as plug valves, feature a rotating cylindrical or tapered plug within the valve body, allowing precise fluid control.

Their simplicity is a core advantage. Crafted from robust materials like stainless or carbon steel, the valve body ensures durability even in challenging contexts (other materials are available on request). This resilience enables them to endure high pressures and temperatures, seamlessly fitting various industries and environments.

Enhancing their versatility is the eccentric plug valve’s bi-directional flow capacity. It effectively regulates the flow of fluid irrespective of its direction, ensuring consistent performance and efficiency. This adaptability suits situations with frequently changing or unpredictable flow directions.

These valves provide exceptional flow rate control, attributed to their distinctive port design. The plug’s cylindrical or tapered shape forms a tight seal against the valve body, minimising leakage and facilitating precise fluid passage. This level of control is vital in sectors where accuracy and reliability are non-negotiable.

Eccentric plug valves find typical applications in oil and gas pipelines, chemical processing, water treatment, and power generation. Their aptitude for handling diverse fluids with varying viscosity and corrosion-resistant bodies makes them indispensable across these industries.

Laminar introduces a compact design of the Eccentric Plug Valve, catering to a broad spectrum of isolation and modulation needs, from wastewater and sewage to air control. This valve, supported by a trunnion and fully encapsulated in elastomeric polymer, boasts a design that prevents scuffing and enhances lifespan.

Available in sizes ranging from 1/2″ to 24″ and featuring end connections such as screw, weld, and flange, these valves offer a range of options. Laminar ensures efficiency and adaptability with hand levers for valves up to 8″ and geared actuators recommended for larger ones.



10, 16, 25


25 to 600 (1/2” to 24”). Larger sizes available on request


Drinking water | Raw water| Cooling water | Waste water | Ballast water | Seawater


Water transmission pipeline – Water distribution network – Water treatment – Pre-treated wastewater – Municipals – Power plants – Industrial application – Shipbuilding – Seawater intakes – Maritime systems – HVAC


  • Plug valves are of quarter-turn, non-lubricated eccentric type, designed, manufactured and tested in accordance with the latest revision of AWWA C517
  • Plug valves shall seal tightly in both directions up to rated pressure and be capable of operation after long periods of inactivity.
  • Flanged valves meet AWWA C517 laying length and have the minimum thickness required by ANSI/ASME B16.1 Class 125. 
  • The nominal size, pressure rating, year of manufacture and manufacturer’s name or mark shall be cast onto the valve body or be on a permanently attached nameplate.  
  • Valve body and bonnet shall be ASTM A536 Grade 65-45-12 ductile iron for superior strength. 
  • The valve shall have a ductile iron plug with a molded and vulcanized Buna-N rubber coating with integral seat per ASTM D429. The plug shaft shall be fitted with permanently lubricated 316 stainless steel upper and lower bearings and thrust bearings.
  • Valve cover fasteners, packing gland studs and nuts shall be Type 316 stainless steel.


Eccentric plug valves have a wide range of applications due to their simple design. These versatile valves are commonly used in high-pressure and low-pressure systems, making them suitable for various industries.

One of the key applications of eccentric plug valves is in petroleum refining. These valves are ideal for handling the demanding conditions of oil piping systems. They can effectively control the flow of crude oil, refined products, and other fluids, ensuring smooth operations throughout the refining process.

Additionally, eccentric plug valves are well-suited for handling dirty liquids. Their design allows them to effectively handle fluids with solid particles or contaminants without compromising performance. This makes them highly desirable in industries where dealing with sediment-laden or viscous liquids is common.

The simplicity of eccentric plug valves also contributes to their widespread use. Their straightforward design makes installation and maintenance relatively easy compared to other valve types. This simplicity translates into cost savings for industries that rely on these valves.

An eccentric plug valve is a form of shutoff and control valve used to regulate fluid flow. Unlike other valves, these valves are designed with an off-centred disc called the plug. When the valve is closed, the plug creates a tight seal within the valve’s body, blocking the fluid flow. When turned open, it allows for a controlled passage of fluid.

The eccentric design of these valves gives them several advantages over traditional ball or gate valves. The off-centre placement of the plug reduces wear and tear on the valve components, making them more reliable over time. Additionally, they provide greater control over the flow of fluids compared to other valves, which makes them ideal for applications where precision is paramount.

Plug valves are used for various applications, ranging from controlling the flow of fluids to isolated lines. In industrial settings, these valves are typically used in water treatment and other liquid-related processes where precise flow control is essential. They can also be used in systems where pressure must be regulated, or contamination must be prevented. The plug design of these valves makes them ideal for regulating low-viscosity liquids that may contain particles. It also provides reliable shutoff capabilities, efficiently handling high-pressure applications. In addition, the straightforward design of these valves makes them easy to maintain and cost-effective to install. This versatility makes plug valves suitable for various industries, including oil and gas, chemical processing, power generation, water treatment, and food processing. Regardless of the application, plug valves are incredibly reliable and have become a go-to valve type for many organizations.

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