1. Straight stroke valves have high flow resistance and low KV values, while angular stroke valves have low flow resistance and high KV values

The medium flow path of straight stroke regulating valves is complex and S-shaped, resulting in high flow resistance and low flow capacity, hence the valve flow coefficient Kv value is small. The medium flow path of the angular stroke valve is simple, resulting in low flow resistance, high flow capacity, and high Kv value (its Kv value is about 1, 5 to 3 times larger than that of the straight stroke valve).

2. Direct stroke valves are prone to sedimentation and blockage of the medium, while angle stroke valves have good self-cleaning performance

The vortex dead zone caused by the complex flow path of the medium in the straight stroke valve is large, which makes the medium easy to settle near the throttle port and cause blockage, resulting in the situation where the valve core cannot be closed or opened. The medium in the angular stroke valve is basically straight through and not easy to form sediment, so it has good anti blocking performance, hence it is called "self-cleaning" performance.

3. Straight stroke valves have large and bulky external dimensions, while angular stroke valves have small external dimensions and light weight

Due to the "S" shape of the medium flow path, the straight stroke valve determines that the regulating valve cavity is relatively complex, the size is large, and the valve body shape is also complex, resulting in a large and bulky valve body shape. Due to its simple flow path, internal cavity, and external shape, the size and weight of the angle stroke valve are relatively small.

4. The stem sealing performance of straight stroke valves is poor, while the stem sealing performance of angle stroke valves is good

The valve core of a straight stroke valve moves up and down, which easily carries the medium out, resulting in poor sealing performance of its valve stem. The stem of the angle stroke valve rotates, making it less likely for the medium to leak outward. It can also use packing with better sealing performance. Therefore, the sealing performance of angle stroke regulating valves is 2-3 times higher than that of straight stroke regulating valves.

5. Straight stroke valves allow for small pressure differentials, while angle stroke valves allow for large pressure differentials

The single seal valve type in the straight stroke valve is an unbalanced structure. In the case of flow opening, the pressure difference is prone to push the valve core open, so a small pressure difference is allowed; The valve core of the angle stroke valve rotates, and the unbalanced torque is "force x force arm". Due to the small force arm and torque, a large pressure difference is allowed.

6. The leakage of straight stroke valves is large, while the leakage of angle stroke valves is small

The double sealed valve type with straight stroke has upper and lower valve seats. The thrust exerted by the medium on the upper and lower valve cores is opposite in direction but nearly equal in magnitude. Therefore, the unbalanced force of the double sealed valve is very small, allowing for a large pressure difference; However, the axial size of the valve core of a double sealed valve cannot be absolutely equal to the axial size of the two valve seats. When the upper valve core and valve seat are in contact, there is still a gap or the opposite between the lower valve core and valve seat. Therefore, the leakage of double sealed valves is large, and the impact of thermal expansion makes this situation even more serious. Angle stroke valves, especially spherical valves, have good contact and low leakage due to the spherical structure of the valve core that is tangent to the sealing surface

7. Straight stroke valves have poor erosion resistance, while angular stroke valves have good erosion resistance