One of the advantages of variable-displacement pumps with hydraulic or electro-hydraulic displacement control, or load-sensing control, is their low standby pressure. Meaning, when pump output isn’t required, the pump ‘stands by’ at a relatively low pressure, and usually at zero flow — other than that necessary for the make-up of internal leakage.
From an efficiency (heat-load) perspective, the lower this … Read more
One of our members writes:
“We have a simple hydraulic system: pump and 4 double-acting cylinders. Most of the oil between the directional control valve and cylinders ‘shuttles’ back and forth in the lines without returning to tank. The manufacturer of the system, Rexroth, tells me there is never a need for bleeding air from the system. How can this … Read more
Now is not a good time. It’s a popular cliché and an evergreen excuse. Fact is of course, when you’re looking into the future, there’s never a good time to do anything. Because it’s always easy to identify some logical reason why right now is not a good time to act.
Sure, the future is always uncertain. But it’s a … Read more