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Flexible throttle valves operate by using a flexible rubber tube on the stem, which clamps and regulates the flow. They can also utilize gas pressure instead of mechanical compression of the hose. The design of these valves is simple, with low operating pressure and high reliability. They are not sensitive to contamination, and their typical working pressure range is usually between 0.3 MPa and 0.63 MPa.
Compared to hydraulic flow control valves, pneumatic flow control valves are more challenging for speed control due to the compressibility of gas. Therefore, when using a pneumatic flow control valve, it's important to follow certain guidelines to avoid issues like crawling or unstable movement. First, ensure that the pipeline has no leaks. Second, maintain good lubrication for the cylinder and piston. Third, install the flow control valve as close as possible to the cylinder or gas motor. Fourth, prefer throttling speed control whenever possible. Lastly, make sure the applied load remains stable. If the external load varies significantly, consider using hydraulic or mechanical systems, such as a gas-liquid linkage, to compensate for speed fluctuations caused by load changes. This helps maintain consistent performance and improves overall system reliability.