Our goal: to be a high-quality manufacturer of industrial control valves, gaining unanimous recognition from new and old customers
Our mission: To fully utilize the effectiveness of industrial control valves to achieve better results
Advantages and disadvantages of ball valves
Advantages of ball valves:
① Has a low flow resistance (actually 0); ② It can be reliably applied to corrosive media and low boiling point liquids because it does not get stuck during operation (when there is no lubricant) Full sealing can be achieved in a large pressure and temperature range; ④ It can achieve rapid opening and closing, and the opening and closing time of some structures is only 0.05~0.1s to ensure that it can be used in the automation system of the test bench. When quickly opening and closing the valve, there is no impact during operation. ⑤ The spherical closure can be automatically positioned at the boundary position; ⑥ The working medium is reliably sealed on both sides; ⑦ During full opening and full closing, the sealing surfaces of the ball and valve seat are isolated from the medium, so the medium passing through the valve at high speed will not cause erosion of the sealing surface; ⑧ With compact structure and light weight, it can be considered as a reasonable valve structure for low-temperature medium systems; ⑨ The valve body is symmetrical, especially the welded valve body structure, which can well withstand the stress from the pipeline; ⑩ The closing element can withstand the high pressure difference during closing The ball valve with a fully welded body can be directly buried underground, preventing the valve internals from being corroded, and has a high service life of up to 30 years. It is an ideal valve for oil and natural gas pipelines.
Disadvantages of ball valves:
① Because the main valve seat sealing ring material for ball valves is polytetrafluoroethylene, which is inert to almost all chemical substances, and has comprehensive characteristics such as low friction coefficient, stable performance, resistance to aging, wide range of temperature applications, and excellent sealing performance. However, the physical characteristics of polytetrafluoroethylene, including its high coefficient of expansion, sensitivity to cold flow, and poor thermal conductivity, require that the design of the valve seat seal must revolve around these characteristics. Therefore, when the sealing material hardens, the reliability of the seal is destroyed. Moreover, the temperature resistance level of polytetrafluoroethylene is relatively low, and it can only be used at temperatures below 180 ℃. Beyond this temperature, the sealing material will age. When considering long-term use, it is generally only used at 120 ℃. ② Its regulating performance is worse than that of a shut-off valve, especially for pneumatic valves (or electric valves).
