single eccentric butterfly valve VS concentric butterfly valve-Belo Valve

Butterfly valve is one widely used industrial valve in various pipeline systems to open, close and regulate the mediums flow. Butterfly valve is mainly consist of valve body, valve stem, valve disc, sealing valve seat, and driving device,etc. According to sealing structure, there are eccentric metal hard sealing butterfly valves and concentric resilient soft sealing butterfly valve. When you are purchasing a butterfly valve, you can select what kind of material should be used for your butterfly valve according to the type of the mediums. 

main parts for a butterfly valve-Belo Valve
main parts for a butterfly valve-Belo Valve

The working principle of butterfly valve is to use the top operating actuator to drive the valve stem and the valve plate to rotate at a right angle and to complete the open, close and regulating of the valve. 

How wafer lug type butterfly valve works
How wafer lug type butterfly valve works

Types of butterfly valves: 

The types of butterfly valves are distinguished according to their characteristics: such as electric butterfly valves, pneumatic actuated butterfly valves, hydraulic butterfly valve, worm gear boxed operated butterfly valves, telescopic butterfly valves, resilient soft sealing butterfly valves, metal hard sealing butterfly valves, extended stem flange butterfly valves, triple eccentric butterfly valves, sanitary butterfly valves, double eccentric butterfly valves, single eccentric butterfly valves, concentric butterfly valves, flange butterfly valves, wafer type butterfly valves, wafer lug type butterfly valves, PTFE lined butterfly valves, EPDM lined butterfly valves, stainless steel butterfly valves, ductile iron butterfly valves, cast steel butterfly valves, bronze butterfly valves, plastic butterfly valves, vacuum butterfly valves, high temperature butterfly valves, low temperature butterfly valves, ventilation butterfly valves,etc; 

concentric flange PTFE lined butterfly valve-Belo Valve
concentric flange PTFE lined butterfly valve-Belo Valve
Ductile cast iron worm gear operated concentric wafer lug type butterfly valve-Belo Valve
Ductile cast iron worm gear operated concentric wafer lug type butterfly valve-Belo Valve

Technical parameters of butterfly valves: 

Nominal diameter: DN40mm-DN4000mm

Nominal pressure: 1.0Mpa-6.4Mpa, 150LB-900LB 

Working temperature: -29℃-425℃

Manufacturing standard: GB,API/ANSI,JIS 

End connect: Flange, welded, wafer

Sealing structure: eccentric metal hard sealing, concentric soft sealing; 

Applicable mediums: water, steam, oils, heat transfer oils

Structure: single eccentric, double eccentric, triple eccentric, concentric

Operating device: manual lever handle, electric actuator, pneumatic actuator, hydraulic actuator; 

stainless steel metal sealed telescopic butterfly valve-Belo Valve
stainless steel metal sealed telescopic butterfly valve-Belo Valve
How D343H 25C cast steel triple metal seal flange butterfly valve looks like-Belo Valve
How D343H 25C cast steel triple metal seal flange butterfly valve looks like-Belo Valve

Applications of butterfly valves: 

Butterfly valve has large flow capacity, good sealing performance, and can open and close freely. Butterfly valve is widely used in various industries such as water conservancy projects, hydro power, electric power, environmental protection, chemical industry,etc, as a opening, closing and regulating device. 

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