Pneumatic butterfly valve is a kind of expandable and contractible internal mold with different shapes, which is made of vulcanized fiber reinforced layer, high compressive strength, elasticity and air tightness of polymer and high-strength fiber cloth. All adopt the process of natural and synthetic combination to ensure the quality is not disordered. It has been proved by many engineering construction practices that the hole drawing process equipment is simple, which not only saves materials, but also has a variety of shapes, such as round, oval, rectangular, arch, octagon, trapezoid and other apertures. It can also be formed into straight holes, variable cross-section holes, etc., which can make the building structure become light and thin-walled hollow beams and slabs.
Protect well during use and non use:
1. When it is not used for a long time, it should be washed and dried, filled with talcum powder inside and coated with talcum powder outside, and placed indoors in a dry, cool and ventilated place.
2. It shall be stretched out and placed flat, and shall not be stacked or piled with weights.
3. Store away from heat sources.
4. Do not contact with acid, alkali, grease and organic solvent.
The vertical displacement of the CFM pneumatic butterfly valve is roughly proportional to the load. With the change of the internal pressure of the capsule, the vertical stiffness increases continuously. The elasticity curve under the same pressure shows an inverse · S "property, and the air elasticity shows an obvious nonlinear elasticity. When the working stroke of the pneumatic butterfly valve is compressed to a large value, the pneumatic butterfly valve contacts the upper and lower bases on the round table, The stiffness of the pneumatic butterfly valve increases significantly. It is shown in the figure that the closer to · 0, the greater the stiffness of the air spring. Moreover, with the increase of air pressure, the stiffness increases at the same displacement, and the stiffness of the air spring is smaller near the design height.