Installed at the tail end of the drainage pipe, the flap valve has the function of preventing backfilling of external water. The flap valve is mainly composed of four parts: seat, valve plate, water seal ring and hinge. Shapes are divided into circles and squares.

. Drainage measures: Drainage from the original chimney drainage wells, no additional drainage devices

Tianjin Tanggu Jinbin Valve Co., Ltd. was founded in 2004, with registered capital of 113 million yuan, 156 employees, 28 sales agents of China,covering an area of 20,000 square meters in total, and 15,100 square meters for factories and offices.It is a valve manufacturer engaged in professional R&D, production and sales,a joint-stock enterprise integrating science, industry and trade.

The company now has 3.5m vertical lathe, 2000mm * 4000mm boring and milling machine and other large processing equipment, multi-functional valve performance testing device and a series of perfect testing equipment