Double Eccentric Butterfly Valves
- All Parts Can Be Made Of Different Materials According To Actual Working Conditions
- -10℃～150℃(Concentric Butterfly Valve), -10℃～120℃(Eccentric Butterfly Valve)
- 50 Years
- Valve Plate as Stainless Steel；ductile Iron
Product Description
What are double eccentric butterfly valves?
A double eccentric butterfly valves comprises a circular disc that revolves within the valve body to either open or close the flow. In an eccentric disc butterfly valve, the disc rotates about an axis that is offset (eccentric) from the valve body’s center. On the other hand, a concentric butterfly valve has a disc that rotates concentrically, with the axis of rotation aligned with the centerline of the valve body and pipe. Both types are employed for flow regulation but exhibit distinct design features.
The Features Between Eccentric And Concentric Butterfly Valves
As quality double eccentric butterfly valves from China butterfly valves supplier, double eccentric butterfly valves gets many features. However, we will compare two types of butterfly valves and list each features below:
- Eccentric disc valves have a more linear flow characteristic, maintaining consistent velocity as they open/close. This causes less turbulence.
- Concentric valves have a more progressive flow trait where flow rate increases non-linearly with valve opening. This results in more turbulence.
- By offsetting the disc, eccentric valves allowInstallation benefits in compact spaces where concentric valves can’t fit between pipe flanges.
- However, concentric valves are simpler in design without the extra clearance required by an eccentric disc’s offset motion.
The Applications of Both Of Butterfly Valves Between Eccentric & Concentric
As quality butterfly valves for these two types, Both see wide chemical, oil/gas, power, marine and more. For instances, Firstly, double eccentric butterfly valves as isolation valves to allow pipe/vessel insulation for control/drainage. Secondly, double eccentric butterfly valves as control valves in piping manifolds to direct flow between multiple lines. Thirdly, double eccentric butterfly valves as shut-off valves in ductwork or wherever flow needs regulating in changing conditions.
Eccentric Disc Butterfly Valves:
- Throttling service to control flow where linearity is important such as pumping stations, HVAC systems and processing plants.
- Where space is constrained due to pipe centrelines being too close together to fit a concentric valve.
Concentric Butterfly Valves:
- On/off applications where gradual filling/emptying is less critical such as ballast tanks or surge tanks.
- Where low cost is a priority due to simpler concentric design requiring less precision/clearance.
- Large water transmission mains where turbulence has minimal effect due to large pipe diameter-to-flow ratio.
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Why Choose Us
TWT, established in 1956 and located in Tianjin Binhai New Area, China’s premier valve production base, embodies excellence with modern design standards, advanced intelligent manufacturing equipment, and a dedicated testing center. As an industry pioneer in valve development and manufacturing, we produce a diverse array of valves including butterfly valves, eccentric semi-ball valves, regulating valves, diamond regulating valves, exhaust valves, hydraulic control valves, and more than 1000 other categories of valves.
