Hose Cleanliness – affects Valves, Pumps, System cooling
Monday, October 24, 2016
contamination (similar to erosion) can mill away tolerances which are used for sealing
purposes. On spring centering valves, the debris may get caught between the valve and
the wall surface. The contamination will cause the slowing down of the motion
of the valve or causing sluggish or adverse mechanical actuation.
particles enter the clearances between moving parts they score and hone the surfaces
to greater tolerances. As these tolerances broaden, system performance is
compromised by pressure losses incurred due to fluid leakage from high to lower
occurrence is when particles that are greater than or equal in size to
the orifice openings become wedged between the two surfaces. The
contamination may cause wear to occur or it may cause the system components to
drives: Microscopic contamination can mill
away material, creating leak points. These leak points rob the hydraulic system
of pressure and cause poor responsiveness.
cooling: Working fluid may not flow through to remove contaminants generated
from metal to metal contact when passages
become blocked. Lower flow rates mean greater heat buildup in systems and
thermal breakdown of the working fluid.
Labels: Fluid Power