Why is the Pentalogic valve so important on a hydraulic dock leveler? The power unit on any brand of hydraulic dock leveler is designed to raise the platform and to extend the hinged lip assembly. Conventional hydraulic dock leveler plumbing contains a number of individual valves and assorted fittings. Increasing the number of individual valves increases the likelihood of component failure and hydraulic leaks developing. The Pentalogic valve is a one piece machined housing that incorporates only two moving components. Fewer components, fewer chance of failure or hydraulic leaks developing. The Pentalogic valve is also designed as a non-adjustable valve. This eliminates the chance of adjustment error in the future. For more information, contact your Pentalift Sales Representative.