Expansion butterfly valve is also called telescopic butterfly valve, which is suitable for water supply and drainage, gas pipelines such as food, medicine, chemical industry, petroleum, electric power, textile, paper, etc. with temperature ≤80 ℃ and nominal pressure ≤1.6MPa. , With the function of compensating the thermal expansion and contraction of the pipeline. The main features of the expansion butterfly valve are as follows:
1. Novel design, reasonable, unique structure, light weight, easy operation, quick opening and closing;
2. In addition to the functions of adjustment and shut-off, and compensation of the thermal expansion and contraction caused by the temperature difference of the pipeline, the telescopic butterfly valve can also facilitate the installation and replacement of difficult-to-repair valves;
3. The sealing parts can be adjusted and replaced, and the sealing performance is reliable.
The unique design of the expansion butterfly valve uses gas pressure to inflate the special rubber valve seat, and the valve seat extends toward the valve disc, so as to provide evenly distributed pressure for the seal at any time. During the opening and closing of the valve, the valve disc and the valve seat will only momentarily contact, so that the valve disc is only slightly impacted. The hard friction caused by the ordinary butterfly valve disc rubbing over the valve seat will reduce the performance and life of the valve.

Our expansion butterfly valve requires only a small torque to switch, which can make the actuator and valve more durable.

According to actual comparison test and field application, our expansion butterfly valve performance is superior to all valves. The life of the butterfly valve can reach one million times, and it can be used even under severe wear. This is unusual. For dry solids, gas and mud, the expansion butterfly valve is most suitable.

Our expansion butterfly valve series is designed for the most demanding conditions. The valve size range is 2 ″ (50mm)-24 ″ (600mm), which is suitable for ANSI and metric flange standards. A full range of actuators, limit switches and control devices can effectively meet different application requirements.


Some applications of expansion butterfly valve products
Mud-like materials, powdered powder, granular silicon powder, hazardous chemical powder, Portland cement, explosive powder, aluminum powder, silica sand, fertilizer, PVC powder, catalyst, titanium silicate, carbon powder, phenol resin, quartz powder .