Bi-directional rubber sealing butterfly valve was researched and developed by our factory in 1991. Through continuous improvement, the product performance has been in the leading position at home and abroad.

1.It has bidirectional sealing function with good sealing performance, which can achieve "no leakage" at positive and negative directions. During installation, it is not subject to the restriction of medium flow direction.

2.The main material of the valve body and butterfly plate is nodular cast iron. The material of the sealing pair is stainless steel and rubber, with long service life.

3.The valve shaft adopts half-shaft structure. The butterfly plate is truss type, with large open area, small flow resistance, energy saving and energy-efficient.

4.A connecting seat is equipped between the flange and the driving part of the valve. The bolt for fixing the packing gland can be adjusted through the packing window on the connecting seat to ensure the shaft sealing.

5.The expansible part of the expansible bi-directional rubber sealing butterfly valve can stretch freely or be fixed at certain position, which can meet the use requirements for different conditions. It has the functions of butterfly valve and the expansion piece.

6.The rubber seal ring can be equipped on the valve body or the butterfly plate. It is determined by users.

7.Worm gear drive is totally closed, which can be used in water for a long time.

8.All butterfly valves of pipe network horizontally installed underground are equipped with unique synchronous display mechanism in the country, which can be used to observe the open and close status of the valve from different operation directions.