The valve core of a straight stroke regulating valve moves vertically, while the fluid moves horizontally. The flow channel structure in the valve chamber is not a straight through type, usually in an S-shaped shape, which forms many blind spots. Over time, the medium is prone to precipitation in these blind spots, which can easily cause blockage. The valve core of the angle stroke valve is in horizontal rotary motion, and the medium is also in horizontal flow direction, so it is not easy to have dead corners and sediment is easily carried away by the fluid. Therefore, the anti blocking performance of straight stroke regulating valves is much better than that of angle stroke valves.

4. Why is the stem of a straight stroke regulating valve thinner?

Due to the principle of high sliding friction and low rolling friction. The stem of a straight stroke valve moves up and down in a sliding motion, which generates significant friction. So designing the valve stem to be small and using PTFE packing with low friction coefficient is to minimize friction as much as possible. However, this has resulted in problems such as thin valve stems, easy bending, and short packing life.