Handwheel Pressure Compensator
Variable Displacement Pumps Models 321/421

For description of operation, see the standard pressure compensator pump model PV 320. In addition to the standard pressure compensator features, these controf types offer a handwheel on the pressure compensator to facilitate easy manual adjustment of compensating pressures.

System Diagram

Drive Shaft Rotation

Pump Rotation of shaft* Oil Flow lnlet Outlet
PF 321 R (CW only) CW A B
PF 421 L (CCW only) CCW B A

*As viewed from the front or shaft end.
**As viewed from the port end (nameplate up).



Terms and Conditions of Sale