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  • concentric butterfly valve 01
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Concentric Butterfly Valves Collection

Concentric butterfly valves are constructed with a stem travelling along the midline of the valve disk and lack any offsets. With a full diameter structure, Dombor as an experienced industrial valve company, our concentric butterfly valves reduce flow resistance and ensure fluids smoothly pass through the valves.

As they are made with fewer components, concentric valves are easier to set up due to their lightweight frame and are more affordable variants. Along with efficient technical support and 2-year product warranty, we provide excellent after-sales tracking to ensure our customers’ satisfaction.


  • Bubble-Tight, full rated bi-directional shutoff
  • One-piece body
  • Integral ISO mounting
  • High performance resilient seat
  • Light weight, low cost and maintenance free
  • Position Indicator

Main Features of the Product

  • Provide a variety of seat and disc materials to suit a variety of process applications
  • The wide flange face seal area provides a tight seal and eliminates the need for flange gaskets
  • It can close quickly, but less support required than a heavier ball valve
  • Integral stainless steel stem ensures stability and reliable disc positioning.

Technical Specifications

Size Range Body Materials
2″-40″(50mm-1000mm) Cast Iron, Ductile Iron, Carbon Steel,Stainless Steel,Nickel Aluminum Bronze,etc
Temperature Range Stem Material
-29 to 180 degree Staniless Steel
Pressure Ratings Seat Materials
PN6-PN16,150psi BUNA-N, EPDM, FKM, Polyurethane
Shutoff Rating Disc Materials
Bidirectional Bubble-tight Nylon  Coated Ductile Iron, Aluminum Bronze, Stainless Steel,etc
Body Style Design Standard
Wafer, Lug and Double Flanged MSS SP 67,  API 609
Flange Drilling Testing Standard
ASME B16.5, EN 1092,GOST 33259 API 598,EN12266-1,ISO 5208
Certifications Face to Face
API 609,CE,EAC,SIL3,ISO 19001 API 609,ISO 5752,MSS SP-68,ASME B16.10,EN558-1
Fugitive Emissions Applications
ISO 158484-1 Chemical, Food and Beverage, Pulp and Paper, Waste Water applications and more
Wench, Worm Gear, Electric, Pneumatic,etc

Reliable Concentric Butterfly Valve Manufacturers

Dombor is one of the trusted manufacturers of concentric butterfly valves used to control the flow of liquids, gases, and slurries. As a leading global concentric butterfly valve manufacturer, we are committed to providing one-stop valve solutions for many industrial applications through our experienced specialists and advanced production processes.

We incorporate a strict quality management system in our operations from manufacturing to final inspection, ensuring our concentric butterfly valves have zero defects and comply with local and international quality standards.

Concentric Butterfly Valve 1

Applications of Dombor Concentric Butterfly Valves

As a concentric butterfly valve supplier, Dombor’s concentric butterfly valves have unique features, such as soft sealing materials, which enable their application in many areas. 


Our cryogenic butterfly valves are widely used in oil and gas processing facilities as they offer proper functionality and reliable sealing at very low temperatures

Pipeline Industry

By adhering to API 6D, ISO 14313, and other industry standards, we ensure our concentric butterfly valves are suitable for applications in the pipeline transport industry.

Refinery and Petrochemical Industry

Dombor concentric butterfly valves are in line with petrochemical and refinery operating conditions and our valve solutions comply with leakage and environmental protection standards.

Wastewater Treatment

Concentric butterfly valves are used to control and direct fluid flow during the process of converting industrial wastewater to clean water. Valves from Dombor concentric butterfly valve factory also minimize water waste through leakage or contamination. 

Marine and Ship

Industrial valves supplier Dombor manufactures high-quality and functional concentric butterfly valves for ships that operate with large quantities of fuel, freshwater, lube oil, or chilled water systems.

Power Generation

Certified as fire-proof and low-leakage, Dombor concentric butterfly valves are manufactured to fit fossil fuel, biofuel, and renewable energy production. They are suitable for industrial, commercial, and residential areas.

Why do You Need China Triple Offset Butterfly Valve

Concentric butterfly valves have a simple structure that consists of fewer components compared to other valves, making them easier to operate and maintain. With a full-diameter structure, the valve regulates flow and ensures the smooth passage of fluids. Here are some advantages of concentric butterfly valves.

  • They take up small space compared to other valves
  • Due to their compact and lightweight form, the installation, maintenance, and labor costs are reduced
  • As the seat is constructed in the form of a sleeve or cartridge inside the body, the media flowing through the valve will not contact the body
  • Concentric butterfly valves are easier to set up
  • These valves require less support to close than industrial ball valves
  • Various seat and disc materials can be used to suit different industrial applications
A Concentric Butterfly Valve

20+ Years Experience As a Concentric Butterfly Valve Manufacturer

Working from our concentric butterfly valve factory, we have provided valve solutions to clients for over two decades. In addition to our wealth of experience, we employ innovative strategies and advanced technology in developing the best valves for our clients.

Tailor-made Valve Solution

Our customizable concentric butterfly valve design options ensure that product materials and construction can be adjusted to fit customers’ preferences and specific applications.


Our extensive valve collection includes a diverse range of butterfly valves, ball valves, check valves, and actuated valves that are suitable for many industrial applications.


To produce fully secure valves, we ensure that all concentric butterfly valves comply with ISO, API, MSS, and ASME standards as well as other international product standards.

Fast Delivery

Partnering with us guarantees swift production and fast shipping as we understand the importance of timelines and schedules to your operation.

After Sales Service

At Dombor, we commit to delivering quality service. Hence, we offer warranties, technical support, and other services after purchase.

China Concentric Butterfly Valves Sourcing Guide

Before sourcing from Dombor concentric butterfly valve supplier, some common factors need to be considered so you could choose the right valves for your business.

What are Concentric Butterfly Valves?

A concentric butterfly valve, also called a zero offset butterfly valve, is a flow regulatory mechanism that uses a rotary disc to control fluid flow. In this design, the stem passes through the middle line of the disc in the centre of the pipe bore, and the seat is inside the diameter of the valve body.

Types Of Concentric Butterfly Valves Available In Dombor

Dombor concentric butterfly valve factory manufactures different types of valves, including Wafer-type concentric butterfly valve, Lug-Type concentric butterfly valve, flanged concentri butterfly valve and other types.

Wafer-Type Butterfly Valves

Wafer Type Concentric Butterfly Valve


The wafer-type concentric butterfly valve ensures tight sealing protection against two-directional pressure differentials. It’s mostly used for one-directional flow devices. This valve uses a tight-fitting cap, such as o-rings, to seal the valve face.

Lug-Type Butterfly Valves

Lug Type Concentric Butterfly Valve


A lug-type butterfly valve is identical to a 3-piece ball valve, where you can replace one side of the pipeline without affecting the other. This design is achieved using threaded inserts, flanges, and two sets of lugs, one for each flange.

Both Flanged Butterfly Valves

Both Flanged Concentric Butterfly Valve

This type of butterfly valve has a flange at both valve ends, which are attached to the pipe flanges. This design is commonly used for large butterfly valve sizes.

Butt-welded Butterfly Valves

Butt Welded Concentric Butterfly Valves

Welded butterfly valves are used for high-pressure systems as direct welding secures the connection. In this design, the angled pipe end and straight valve ends are welded together, forming a butt-welded connection. They are commonly used for small butterfly valve sizes.

Construction Of the Concentric Butterfly Valve

Most concentric butterfly valves use an elastomeric seat, against which sealing occurs. This seat design ensures the o-rings are not deformed. 

The valve body is constructed in various ways. For example, the wafer-type design fits between two pipeline flanges, and the lug-type design is held between two pipe flanges by bolts.

For the construction and connection of the stem and disc, the disc is bored to receive the stem. This can be done in two ways: the disc is either bored through and secured to the stem using nuts and bolts or the disc is first bored and the upper stem bore is shaped to fit a square or hex-shape.

In designing, concentric butterfly valve suppliers should consider the properties of the media that the valve control after installation. Depending on its application, concentric butterfly valve manufacturers can develop valves in a wide-ranging series of standard and custom sizes to offer options to clients.

How Does a Concentric Butterfly Valve Work?

The valve body, seal, disc, and stem make up the concentric butterfly valve. The disc is connected to an actuator or handle outside the valve, which rotates it on a vertical or horizontal axis.

The valve is fully open when the disc is rotated parallel to the piping run and the valve is shut when the disc is rotated to a perpendicular position. For throttling or flow regulation purposes, a handle-locking device is used to keep the valve in an intermediate position.

Concentric Butterfly Valve vs. Eccentric Butterfly Valve

  • While a concentric butterfly valve disc is simple, an eccentric butterfly valve disc requires several components, such as a sealing ring and holding ring.
  • In the concentric valve, the disc touches the rubber seat directly, but in the eccentric valve, a laminated disc seals the metal body seat.
  • The seat of a concentric butterfly valve is soft while an eccentric butterfly valve seat is made of metal.
  • The pressure limit of a concentric butterfly valve is 150LB/PN25, but an eccentric butterfly valve can handle up to 600LB/PN100 of pressure.
  • Due to its construction, the concentric rubber seat cannot handle high temperatures, but an eccentric/double offset butterfly valve can handle high temperatures as they have a metal seal design.

The Lowest-Cost Strategy Is To Choose Reliable DomBor Valves.

DomBor Valve, with its experienced specialists, specializes in manufacturing industrial valves and provides technical support and one-stop solutions for the global market.

animated Logo of dombor

Generating high-quality valve solutions requires a deep insight into market needs. DomBor Valve, as a reliable valve manufacturer, relies on a trusted supply network, the latest production, and assembly machinery, along with digital design capabilities and 20 years of industry experience.

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