One of our members wrote me with this question:
“I was subcontracted to remove a 30 GPM, 4000 PSI rated hydraulic pump from one plastic injection press and install it into a similar hydraulic system.
The hydraulic pump and prime mover are both beside and below the bottom of the reservoir; a “flooded inlet” design. AND, except for the ball … Read more
One of our members wrote me with this question:
“I’d like to hear your opinion about isolation valves on pump intake lines. Within our company there is an ongoing debate over whether we should use a more expensive ball valve or a cheaper butterfly valve?”
At the root of this question is the negative effect of turbulence in the pump … Read more
As a means of power transmission, hydraulics has many advantages. But overall efficiency is NOT one of them. A single-reduction gearbox has an efficiency of 98 to 99 percent, double-reduction 96 to 97 percent and triple-reduction 95 percent. And a chain drive in good condition has an efficiency of 97 to 98 percent.
A high-performance piston pump has an efficiency … Read more