Features of pneumatic butterfly valve: the circular butterfly plate rolling with the valve is used for opening and closing, and the pneumatic valve that has completed the start action is mainly used as the shut-off valve. According to the structural characteristics of the pneumatic butterfly valve, it can also be planned to have the function of dispatching or section valve and dispatching. Now, the use of butterfly valves in low-pressure large and medium caliber pipelines is increasing. In fact, many equipment have pneumatic butterfly valves, especially on the pipeline, but we must not underestimate it. However, many people have heard of pneumatic butterfly valve for the first time, and they do not understand its advantages and disadvantages. But don't worry about the advantages and disadvantages of pneumatic butterfly valves.

Product specifications and main characteristics of non-metallic contraction joints
Non metallic contraction joints, also known as flexible fabric expansion joints or fiber compensators, have been widely used in exhaust, ventilation, smoke and dust, waste gas disposal and other pipeline systems to compensate for the displacement caused by thermal expansion and contraction, vibration and stress, which can reduce noise and vibration, and can be used as expansion joints of large diameter pipes. It has the advantages of no elastic reaction, simple pipeline design, compact structure, large compensation, strong vibration reduction effect, light weight, convenient device operation, low price, etc.
Main product types
Construction type code Nominal diameter Applicable pressure Applicable temperature Circular FPY φ 150- φ 9500-25 - 100KPa - 40 ℃ - 650 ℃ rectangular FPJ0.12m2 - 150m2-25 - 100KPa - 40 ℃ - 650 ℃ Connection mode: welding type, flange type.
Main characteristics of non-metallic contraction joint:
1. Compensating thermal shrinkage: non-metallic compensators can compensate in multiple directions, which is much better than metal compensators that can only compensate in a single way.
2. Compensating device error: because the system error is unavoidable in the process of pipe connection, the non-metallic compensator can better compensate the device error.
3. Noise elimination and vibration reduction: the fiber fabric (silica gel cloth, etc.) and thermal insulation cotton body of non-metallic compensator have the functions of sound absorption, vibration isolation and transmission, which can effectively reduce the noise and vibration of boiler, fan and other systems.
4. No reverse thrust: Since the main material of non-metallic compensator is fiber fabric, it is unable to transmit.
5. Fiber compensators for non-metallic compensators can simplify the design, prevent the use of large bearings, and save a lot of data and labor.
6. Good high-temperature and corrosion resistance of non-metallic contraction joint: the selected fluoroplastic and silicone materials have good high-temperature and corrosion resistance.
7. The non-metallic compensator has good sealing performance: there is a relatively complete consumer assembly system, and the fiber compensator can ensure no leakage. Professional consumer metal contraction joints - high-temperature contraction joints - non-metallic contraction joints - high-pressure contraction joints - high-pressure contraction joints, metal contraction joints, high-temperature contraction joints, non-metallic contraction joints.