What are the performance characteristics and precautions of pneumatic butterfly valve
Pneumatic butterfly valve is also called inflatable core mold, internal mold and bridge inflatable core mold. It is a kind of internal mold with different shapes that can shrink and shrink, which is vulcanized from applied polymer properties and high-strength fiber cloth. It is mainly used for the pouring and forming of highway bridge concrete pre tensioned and post tensioned beams. It is also used in culvert drainage works. After inflation and shrinkage, it has sufficient strength to accept the pressure of concrete. It can replace the original wood mold, bamboo mold and steel mold, and can be repeatedly used. It is a supporting product of concrete products that can reduce costs and speed up construction progress.
1、 Performance characteristics:
1. The design of pneumatic butterfly valve is scientific and reasonable: the use of pneumatic butterfly valve, prefabricated or cast-in-situ waste hollow slab beam components, all meet the design requirements, and the pneumatic butterfly valve is simple, labor, time and material saving;
2. Pneumatic butterfly valve has good aging resistance: it is made of synthetic, natural and fiber reinforced layer after vulcanization. It not only has good anti expansion strength, but also has elasticity and flexibility. The pneumatic butterfly valve can meet the construction and application under various working conditions.
3. The operating temperature of pneumatic butterfly valve is universal: within the range of - 10 -+90 degrees, the material of pneumatic butterfly valve will not change.
4. The pneumatic butterfly valve provides the necessary conditions for the lightweight construction of bridges and buildings on site: the prestressed hollow slab concrete component is more than 20% lighter than the non prestressed solid component due to the use of the pneumatic butterfly valve, thus reducing the weight of the superstructure of the building, shortening the pile foundation, increasing the span, and making the site construction cumbersome and safe.
5. The construction process of pneumatic butterfly valve is tedious, safe and sanitary: only a few simple tools are required to use pneumatic butterfly valve, and no special process is required; Just put the pneumatic butterfly valve into the reinforcement cage, and when the inflation pressure reaches the working pressure (according to the pressure gauge and the instruction book), concrete can be poured. When the concrete solidifies, deflate the pneumatic butterfly valve and draw it out to complete the molding of waste components, and the pneumatic butterfly valve will not pollute the environment.
2、 Precautions:
1. If 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 in a dry, cool and ventilated center indoors.
2. It shall be stretched out and laid flat, and shall not be stacked or piled with weights.
3. The center of the deposit should be far away from the heat source to avoid damaging itself.
4. Do not contact with acids, alkalis, oils and organic solvents.