The valve body and disc of a concentric butterfly valve are designed as concentric circles, with the disc positioned concentrically relative to the pipeline axis. The valve opens or closes by rotating the disc. The main shaft of the disc is connected to the handwheel.
Concentric butterfly valves are suitable for medium- to low-pressure pipelines with large diameters, as well as applications requiring precise flow regulation and high sealing performance. They are available with either soft-sealing or metal-sealing designs and can handle media such as water, wastewater, air, oil, steam, petroleum, and chemicals.
Specification
Butterfly valve design according to BS5155, API609, EN593
Face to face DIN3202K1/API609/EN558-1/ISO5752
End Flanges DIN2501/PN10/PN16/ASME B16.1/JISB2220
Inspection and test DIN 3230 Part3, API598, EN12266-1
Material: Ductile Iron
Size Range: DN40~DN1200,1.5″~48″
Pressure Rating: ASME CL, 150, 300, 600
Temperature Range: -196°C~600°C
Design Description: Soft Rubber Seated
Ductile Iron Concentric Butterfly Valve Advantages:
Excellent sealing performance
Good flow regulation capability
Simple structure for easy opening and closing
Good corrosion resistance
Ductile Iron Concentric Butterfly Valve Disadvantages:
The disc position is relatively fixed, making maintenance difficult
Limited flow control range
