Valve Stiction/Erosive Wear
|서보 밸브||1 - 4µm|
|비례 제어 밸브||1 - 6µm|
|Directional/control valve||2 - 8µm|
사례 연구: Valve Shifting Force vs. Contamination in Fluid
- About 15 gpm, 3000 psi
- Radial clearance, 8µm
Valve held stationary and under pressure before shifting force was measured.
The study illustrates that the force required for valve shifting is greatest when challenged by particles in the operating clearance size range. Valve clearances will exclude the larger particles and are less sensitive to the smaller ones. The conclusion is that particles in the clearance size range will be caught in the clearance space and thereby require greater force to get the valve to shift.