Danfoss PVG 32 Application Manual page 11

Application Guide
Using flow or pressure control spools
Summary
© Danfoss | Feb 2017
In certain applications, you can use a PVG with a pressure control (PC) spool instead of a traditional flow
control (FC) spool. The PC spool provides a dampening effect on natural oscillations because the PC spool
maintains a constant pressure on the work port while allowing a variable flow, depending on changes in
the work port load.
A situation in which PC spools are of great value is when you are lowering a load in an application that
uses counterbalance (CB) valves. A combined FC and PC spool, with the FC in the lifting port and the PC
in the lowering port, results in optimal controllability.
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