How to select the triple offset butterfly valve and double offset butterfly valve?
2024-09-24
How to select the triple offset butterfly valve and double offset butterfly valve?
How to select the triple offset butterfly valve and double offset butterfly valve?
A butterfly valve is a valve in which the closing mechanism (valve disc or butterfly plate) is a disc that rotates around the valve axis to open and close the valve. It is mainly used for cutting off and throttling in pipelines. According to the structural differences, butterfly valves can be divided into three types: concentric butterfly valves, double eccentric butterfly valves and triple eccentric butterfly valves.
Double Offset Butterfly Valve
What is Double Offset Butterfly Valve?
Double eccentric butterfly valves, also known as high-performance butterfly valves, are used in water plants, power plants, steel mills, chemical industries and environmental facilities that require efficient drainage systems. They are often used to discharge wastewater from these facilities or transport products requiring high performance.
In many applications, eccentric butterfly valves provide a convenient and cost-reducing alternative to globe and ball valves, being cheaper, lighter and easier to install than similar products. In addition, metal valve seats provide better protection against corrosion and significantly extend their service life.
How Double Offset Butterfly Valve Works?
A double eccentric butterfly valve controls fluid flow in a pipe using a disc with a rod that passes through the center of rotation.
The valve has two eccentric shafts that offset the valve disc, creating a seal between the disc and the seat.When fully open, the disc is perpendicular to the fluid flow, allowing maximum flow rate.When the valve is closed, the disc rotates to create a tighter seal, minimizing leakage.
The double eccentric design reduces torque requirements during operation and minimizes wear on the valve, thereby extending service life.The valve is suitable for a wide range of applications, including water treatment, chemical processing and power generation.
