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  • Users: kebecano
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  1. kebecano

    4 cylinder synchro short stroke 10-150mm 90 mins per stroke

    Hi all, I'd like your opinion on a certain system where 4 cylinders are to be synchrod within ± 0.5mm Stroke is 10-150mm the stroke has a ±90 minute duration iow the 4 cylinders will have to extend lets say 150mm over the course of 90 minutes. Initial design is to be closed loop with vickers...
  2. kebecano

    Split case pump mechanical seal failure

    Hi everyone, I am currently having problems with mechanical seal failures on two Aurora Series 421 - Horizontal Multi Stage Split Case Pumps. Sync speed of 3600RPM, ± 1000gpm Size: 6x6 with an Impeller 11.315 trimmed down to 11.25in by dealer in order to reduce amp draw I would like to...
  3. kebecano

    why Hollow vs full pistons in variable pumps and motors

    Hi all, my students asked me why some pisons in carbiable piston pump motors and pumps are hollow, and why others are full.??? I have a couple of ideas why, but I'like input on this as some people have mentioned its just the way it is, but I honestly think that manufacturers won't spend extra...
  4. kebecano

    Proportional directional valves

    Hi all, Could anyone familiar with these valves (Hytos in this case) help me figure out why the following happens: I have a hydraulic circuit where the principal components are: pump, Hytos proportional directional valve with closed center, a sequence valve which will actuate a cylinder (on...

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