Double Offset Butterfly Valve
Double Offset Butterfly Valve. Available in size 65mm to 1500mm. DN65 to DN1500. Double Offset Butterfly Valve is an Eccentric type valve which has 2 counter balance contrast enabling there to be less grating or rubbing on the valve seat when opening or closing the disc compared with a Concentril type butterfly Valve. This is acheived by two counter balance behind the valve disc. The Double Offset Butterfly Valve is a shut off valve. Ideally suited for high flow rates and large diameter pipes 200mm and above, making it easier for the operator compared with a lever handle. A very popular valve for flow control and isolation. Butterfly Valve range is extensive, with wafer butterfly valve style, lugged butterfly valve style, flanged butterfly valve style, grooved end butterfly valve style, threaded butterfly valve style and more. Butterfly Valve material and pressure class variations are extensive as well. The butterfly valve is named butterfly valve because the disc opens and closes on a spindle shaft like a butterfly wing. Contact DEWATER PRODUCTS for any Butterfly Valve enquiry.
A Butterfly Valve is a valve which has a disc that swings on a spindle shaft like a butterfly wing hence the name Butterfly Valve. The disc is mounted inside a pipe (valve body) in order to control flow and seal on a lining when closed. Connection varies depending on the valve type and can be wafer between the two pipe flanges, lugged to fasten onto a pipe flange, flanged, threaded and grooved. The Butterfly Valve is commonly opened and closed using a lever handle. In larger sizes above 200mm, then it is more common for a worm gear drive and hand wheel to be installed, as it allows for easier opening and closing for the operator. Larger Valves become harder to close with a lever handle because of the flow and volume of fluid moving in the pipe. The operator will find it much easier using a hand wheel, with geared reduction. Another common way for a butterfly valve to be opened and closed is with an Actuator. Actuators can be Pneumatic, Electric or Hydraulic. The cost varies for each type of actuator.
The seal material on butterfly valves are an important element for the correct function of a butterfly valve. The seal needs to withstand any potential damage from heat and chemicals being pumped. There are a range of seal materials available.
Our range of Butterfly Valves are CE approved, ISO approved, API-6D approved.
Dewater Products supply Butterfly Valves in all sizes, types and classes. Please contact us if you require a certain type of Valve.