Excessively high initial differential pressure raises flow resistance in the oil circuit, increasing the load on the hydraulic pump. This leads to notably higher power consumption and heat generation of the motor. Long-term operation will accelerate pump wear and push up equipment operating costs.
Hydraulic oil already has high viscosity at low temperatures. Combined with high initial differential pressure, oil flow is further restricted. This tends to cause insufficient oil suction, cavitation and abnormal noise in the oil pump, as well as delayed oil supply and sluggish movement of cylinders and valves.
The differential pressure reaches the cracking pressure of the bypass valve long before normal clogging occurs. Oil flows directly past the filter media, disabling the filtration function. Continuous ingress of contaminants accelerates wear, sticking and internal leakage of precision components such as valve spools, plungers and bearings.
High initial resistance makes contaminants more likely to embed in the pores of filter media, speeding up the rise of differential pressure. The filter reaches the replacement threshold prematurely, resulting in more frequent replacements and higher maintenance costs.
Fluctuating resistance causes abnormal backpressure and intensified pressure pulsations in pipelines. These impacts pipeline joints, seals and filter end caps, easily leading to leakage, debonding and media deformation, and undermining the overall operational stability of the hydraulic system.
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