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Since the hard seal ball valve spout is alloy steel, the sealing ring is alloy steel surfacing, so the hard seal ball valve in the switch will not produce too much wear. (Its hardness coefficient is 65-70)
Due to the hard seal ball valve seal is artificial grinding until the spool and seal ring can be used. So its sealing performance is reliable.
Because the hard sealing ball valve seal ring bottom USES the spring to make the seal ring and the spool tightly hold together, so in the outside force exceeds the spring pretension when the switch is very light.
It has been widely used in petroleum, chemical industry, power generation, paper making, atomic energy, aviation, rocket, and other sectors, as well as people's daily life.
The pneumatic ball valve structure is simple and compact, reliable sealing, convenient maintenance, sealing surface and sphere are often in a closed state, not easy to be eroded by the medium, easy to operate and maintain, suitable for water, solvent, acid and natural gas and another general working medium, mainly used to cut off or connect the medium in the pipeline, can also be used for fluid regulation and control.
1. Butterfly valve features simple structure, small volume, lightweight, low material consumption, small installation size, quick switch, 90° reciprocating rotation, small driving torque, etc. It is used to block, turn on and adjust the medium in the pipeline, with good fluid control characteristics and sealing performance.
2. The butterfly valve can transport mud, at the mouth of the pipe liquid minimum. Good sealing can be achieved under low pressure. Good adjustment performance.
3. The streamlined design of the butterfly plate, so that the fluid resistance loss is small, may be said to be an energy-saving product.
4. The valve stem for the through rod structure, after conditioning treatment, has good comprehensive mechanical properties and corrosion resistance, abrasion resistance. Butterfly valve open and close when the stem only rotary motion and not for lifting operation, stem packing is not easy to destroy, sealing reliable. It is fixed with the disc tapered pin, and the overhanging end is designed to prevent the disc stem from crashing when it breaks unexpectedly at the connection between the disc stem and the disc.
5. Connection methods include flange connection, clamping connection, welding connection, and lug clamping connection.
The driving forms include manual, worm drive, electric, pneumatic, hydraulic, electro-hydraulic linkage, and other actuators, which can realize remote control and automatic operation.