Marine JIS Wafer Type Centerline Manual Butterfly Valve JIS 5K 10K

Haomai Marine JIS Wafer Type Centerline Manual Butterfly Valve JIS F7480
Nominal Pressure JIS5K-16K, Flange Standard: JIS B2220, Material: Body: Ductile Iron QT450, Cast Steel ZG230-450, Stainless Steel SUS, Bronze BZ; Disc: Stainless Steel SUS304, Bronze BZ; Seat: Rubber NBR, FPM, EPDM, PTFE; Nominal Diameter DN40-DN200.

Marine JIS Wafer Type Centerline Manual Butterfly Valve JIS 5K 10K

In the 1930s, the butterfly valve was invented in the United States, introduced to Japan in the 1950s, and became widely used in Japan by the 1960s. It was not until the 1970s that it gained popularity in China. Currently, butterfly valves with diameters above DN300 mm are gradually replacing gate valves. Compared to gate valves, butterfly valves have shorter opening and closing times, require smaller operating torque, occupy less installation space, and are lighter in weight. Taking DN1000 as an example, a butterfly valve weighs about 2 tons, while a gate valve weighs about 3.5 tons. Additionally, butterfly valves can easily be combined with various driving devices, offering excellent durability and reliability. 

The drawback of rubber-sealed butterfly valves is that, when used for throttling, improper operation can cause cavitation, leading to issues such as peeling or damage of the rubber seat. To address this, metal-sealed butterfly valves have been developed internationally, reducing the cavitation zone. In recent years, China has also developed metal-sealed butterfly valves, and Japan has further advanced with the development of comb-tooth butterfly valves that are resistant to cavitation, low vibration, and low noise.

Haomai Product Ordering Instructions:  

1. Product name, model, nominal diameter 2. Medium and temperature, pressure range 3. Whether there are accessories, delivery time, special requirements, etc., to help us select the correct model for you. 

Company's Main Products:   

2. Various models of marine flanged and threaded connection cast copper, stainless steel globe valves, globe check valves, check valves, gate valves, plug valves, butterfly valves, ball valves, sea valves, fire hydrants, 

Pressure gauge valves, and manual, pneumatic quick-closing valves, among over 300 specifications; also producing GB, CB, CBM marine air pipe heads, mud boxes, coarse water strainers, and other pipeline accessory series products.