Pneumatic ball valve is a hollow valve product used for flexible connection between metal pipes. Pneumatic ball valve is also called valve pipe pneumatic ball valve, flexible pneumatic ball valve, valve pneumatic ball valve, flexible pneumatic ball valve, high pressure pneumatic ball valve, valve shock absorber, etc. It is a pipe joint with high elasticity, high air tightness, medium resistance and weather resistance. This product takes advantage of the elasticity, high air tightness, medium resistance, weather resistance and radiation resistance of the valve. It is made of polyester cord fabric with high strength and strong cold and hot stability, which is compounded diagonally with it, and then vulcanized by high-pressure and high-temperature molds.
It is widely used in various pipeline systems. According to the external form, it can be classified as: single ball pneumatic ball valve, double ball pneumatic ball valve, three ball pneumatic ball valve, concentric reducing pneumatic ball valve, eccentric reducing pneumatic ball valve, clamp type pneumatic ball valve, 90 ° valve elbow, etc. Classification according to the medium used: general (ordinary) pneumatic ball valve, high-temperature resistant pneumatic ball valve, acid and alkali resistant pneumatic ball valve, wear-resistant pneumatic ball valve, desulfurization dedicated pneumatic ball valve, etc. Classification according to working pressure: 0.25Mpa, 0.6Mpa, 1.0Mpa, 1.6Mpa, 2.5Mpa, 4.0Mpa.
Sealing requirements: 1. When the upstream surface is a corrosive medium, the gap can be sealed with sealing materials. See the waterproof casing atlas for the practice; Installation drawing of flexible waterproof sleeve (Type A). 2. Filler materials of flexible waterproof casing: asphalt hemp fiber, polystyrene board, PVC foam plastic board. 3. Sealing paste: polysulfide sealing paste, polyurethane sealing paste. 4. The dimensional tolerance and geometric tolerance of welding structure shall comply with JB/T5000.3-1998. Manual arc welding is adopted for welding, and the welding rod model is E4303, and the brand is J422. The basic shape and size of weld groove shall comply with GB985-88. 5. When flexible waterproof casing is rolled, the allowable deviation of perimeter is D2 ≤ 600, D2>600 ± 0.0035D2. 6. The thickness of the concrete wall where the wall passes through shall not be less than 300, otherwise the wall shall be thickened on one side or both sides, and the diameter of the thickened part shall be at least D5+200. 7. The weight of flexible waterproof casing shall be calculated with L=300. If the wall thickness is greater than 300, it shall be calculated separately. 8. If a non concrete wall is encountered at the place where the flexible waterproof casing penetrates the wall, the concrete wall shall be used locally, and the pouring range shall be 200 larger than the wing ring diameter (D5). Moreover, the casing must be poured at one time on the inner wall to integrate the mechanical scalability of the metal expansion device and the multiple displacement functions of the flexible pneumatic ball valve, which can not only expand and contract freely during installation, disassembly and maintenance, It can also compensate for the linear expansion and contraction of the pipeline due to temperature changes during operation, as well as the angular displacement caused by different centrality of the pipeline due to foundation settlement and other reasons. At the same time, it can also transmit vibration and noise. It is a multi-functional pipeline pneumatic valve.