1. When installing D343X PN6, PN10 flanged double soft seal butterfly valves. The disc should be stopped in the closed position.

2. The opening position should be determined by the rotation angle of the butterfly plate.

3. Butterfly valve with bypass valve should be opened before opening.

4, Should be installed according to the manufacturer’s installation instructions, large weight of the butterfly valve. Should be set up solid worm gear flange type soft seal butterfly valve foundation.

5. The butterfly valve plate is installed in the diameter direction of the pipeline. In the butterfly valve body cylindrical channel, disc rotation around the axis, rotation Angle between 0°-90°, rotation to 90° signal butterfly valve. The valve is fully open.

6. If the butterfly valve is required to be used manually as a flow control clamp hard seal butterfly valve system. The main thing is to choose the correct size and type of valve. The structure principle of butterfly valve is especially suitable for the production of large diameter valves. Butterfly valve is not only widely used in petroleum, gas, chemical, water treatment and other general industry, but also used in the cooling water system of thermal power station.

7, Commonly used butterfly valve has two kinds of clamp butterfly valve and flange butterfly valve. Clamp butterfly valve is connected with a double-headed bolt valve manual clamp soft seal butterfly valve between the two pipe flanges. Manual clamp fluorine lined butterfly valve flange type butterfly valve is a valve with a flange, with a bolt valve on both ends of the flange connected to the pipe flange.