Pneumatic three-way ball valve introduced the application of occasions and troubleshooting
As the pneumatic three-way ball valve is usually rubber, nylon and PTFE as the seat ring material, so its temperature is limited by the seat ring material. The cut-off effect of the ball valve is achieved by pressing the metal ball against each other by the medium under the action of the medium (floating ball valve). Seat ring in a certain amount of contact pressure, elastic deformation occurs in some areas. This deformation can compensate for the ball manufacturing accuracy and surface roughness, to ensure the sealing performance of the ball valve. Since the seat ring of the pneumatic three-way ball valve is usually made of plastic, it is necessary to consider the ball valve's fire-resistance and fire-prevention when selecting the structure and performance of the ball valve, especially in the sectors of petroleum, chemical industry and metallurgy, Explosive media equipment and piping systems used in the ball valve, but should pay attention to fire and fire. Normally, the sealing performance is strictly controlled at two positions, the mud, wear and contraction channels, rapid opening and closing movements (1/4 turn on and off), high pressure cutoff (large pressure drop), low noise, cavitation and gasification, A small amount of leakage to the atmosphere, the operating torque is small, the fluid resistance of small pipe systems, the recommended use of the ball valve. Pneumatic three-way ball valve is also suitable for light structure, low pressure cutoff (small pressure difference), corrosive medium piping system. Ball valves are also available in cryogenic (cryogenic) systems and piping systems. Oxygen piping systems in the metallurgical industry require the use of carefully degreased ball valves. In the oil pipeline and gas pipeline in the main line to be buried in the ground, you need to use full-bore welded ball valve. When required to have regulatory performance, the need to use a special structure with a V-shaped opening ball valve. In petroleum, petrochemical, chemical, power, urban construction, the working temperature of 200 degrees above the pipeline system can choose metal to metal sealed ball valve. Pneumatic three-way ball valve common faults and solutions: Ball valve has long been subject to material erosion, resulting in friction, resulting in severe impact wear and tear, can not meet the normal production, while causing the equipment to shorten the service life. At present more wear-resistant materials for ball valve wear, such as ceramic materials, polymer composites and other methods, the application of more Meijiahua technology system. Polymer materials have excellent adhesion properties, superior wear resistance, safe to solve the shortcomings of metal often wear and tear, to ensure the normal production of business equipment. And the unique ceramic materials and special surface hardening agent in the material make it wear-resistant and anti-physical impact performance better than any steel or even more than ceramic tile in the worst dry-grinding environment. The pneumatic three- And performance is the ideal material to prevent accumulation of coal.
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