How to judge the price of the manual of pneumatic ball valve?
Pneumatic ball valve is a hollow valve product used for flexible connection between metal pipes. Pneumatic ball valve is also called valve tube 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 kind of pipe joint with high elasticity, high air tightness, medium resistance and climate resistance. The 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 thermal stability, and is vulcanized by high pressure and high temperature mold.
It is widely used in various pipeline systems. According to the external shape classification: single ball pneumatic ball valve, double ball pneumatic ball valve, three ball pneumatic ball valve, concentric reducing pneumatic ball valve, eccentric reducing diameter pneumatic ball valve, clamp type pneumatic ball valve, 90 ° valve elbow, etc. According to the media 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 special pneumatic ball valve, etc. According to working pressure: 0.25MPa, 0.6MPa, 1.0MPa, 1.6Mpa, 2.5MPa, 4.0Mpa.
Sealing requirements: 1. When the upstream surface is corrosive medium, sealing materials can be used to seal the gap. See the waterproof casing atlas for the method; the installation drawing of flexible waterproof casing (type A). 2. Flexible waterproof casing filler materials: asphalt hemp wire, polystyrene board, PVC foam plastic board. 3. Sealing paste: polysulfide sealing paste, polyurethane sealing paste. 4. The dimensional tolerance and geometric tolerance of welded structure shall be implemented according to JB / t5000.3-1998. Manual arc welding is adopted for welding, with E4303 welding rod and J422 welding rod. The basic shape and size of weld groove shall be in accordance with GB985-88. 5. When the flexible waterproof casing is rolled, the allowable perimeter deviation is: D2 ≤ 600, D2 > 600 ± 0.0035d2. 6. The thickness of the concrete wall passing through the wall 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 as l = 300. If the wall thickness is greater than 300, it shall be calculated separately. 8. If the flexible waterproof casing passes through the wall, it should be partially replaced with concrete wall. The pouring range should be 200 larger than the wing ring diameter (D5). Moreover, the casing must be poured into the inner wall at one time, which integrates the mechanical expansion of the metal expansion device and the multi position movement function of the flexible pneumatic ball valve. It can not only freely expand and expand in the installation and disassembly maintenance, but also can be used in the installation, disassembly and maintenance In operation, it can compensate linear expansion and contraction of pipeline caused by temperature change, and compensate ground angular deviation caused by different centrality of pipeline caused by foundation settlement and other reasons. It can also transfer vibration and noise. It is a multifunctional pneumatic valve for pipeline.