What are the advantages and disadvantages of different valves?

Release time:30-05-2019

When looking for a valve that matches the application, […]

When looking for a valve that matches the application, first consider the four basic types of throttle control valves, namely cage ball valves, rotary float valves, eccentric valves and butterfly valves.
Cage ball valves are available in a wide variety of tab styles to meet the needs of most applications, making them the preferred choice for a wide range of valves. There are many types of cage ball valve adjustments, including balance adjustment tabs, unbalanced adjustment tabs, elastic seat tabs, constrained tabs, and full-size tabs. In many cases, the various tab configurations of a valve body are interchangeable.
Cage ball valves also have several drawbacks. First, the size of the valve is limited (usually 16 inches); second, compared with the same size sight valve (such as float valve or butterfly valve), its capacity is relatively low; third is the higher price, especially large Cage ball valve of caliber. However, cage ball valves have excellent performance in reducing process variability and are often sufficient to compensate for these deficiencies.Downshift Valves Suppliers
The flow rate of the rotating float valve is larger than that of the cage of the same diameter. Although the control range of the rotary float valve is greater than that of the cage ball valve, it is still superior to most other types of valves. The allowable pressure drop and allowable temperature range of the rotary float valve are smaller than the cage ball valve. Usually their upper pressure drop is 7.0x105kg/m2, which is suitable for use at temperatures below 398 °C. Float valves are not suitable for liquids that are prone to cavitation, and are often subject to large noise when used in gases with high pressure drops.
The eccentric valve has less friction than the float valve and is less expensive. The unique structural design makes it more precise to control process variability. In addition, the advantages and disadvantages of the eccentric valve are not much different from those of the float valve.
The butterfly valve is a low-end valve as measured by the performance of the valve. The butterfly valve has a large flow rate, the cheapest price, and a variety of different calibers. However, the characteristic curve of the butterfly valve has only one proportional characteristic curve, which greatly limits the performance of the butterfly valve to reduce the process variability. For this reason, butterfly valves can only be used in applications where the load is fixed. Although butterfly valves are available in a variety of different sizes and can be fabricated from most cast alloys, butterfly valves do not meet ANSI requirements for face-to-face dimensions, nor do they apply to fluids that are prone to cavitation or where noise is high. . The information here is provided free of charge by Jiangsu Jinhu Aotemei Automation Instrument Factory, hoping to bring more help to those in need.