Danfoss PVG 32 Application Guide

Normally, FC spools are used for most applications. The basic principle is shown in Basic principle of an FC
spool on page 5. The main spool works as a variable orifice controlling flow P>A/B and A/B>T,
simultaneously.
Basic principle of an FC spool
Pl is the hydraulic load pressure (determined by the size of the load) that acts in parallel with a spring on
one side of the compensator. The other side of the compensator is connected to the Pc pressure. The Pc
pressure will remain 7 bar higher than Pl. This also means that flow out of the valve is always directly
proportional to the opening area of the main spool. This can be seen in FC spool on page 5. A certain
position of the spool will always give the same amount of flow out of the valve independent of load
changes on the work ports.
FC spool
Application Guide
Using flow or pressure control spools
Functionality of a flow control spool
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Danfoss | Feb 2017 AB00000079en-US0101 | 5

Danfoss PVG 32 Specifications

General

Category	Control Unit
Maximum working pressure	350 bar
Size	32
Type	Proportional Valve
Maximum operating pressure	420 bar
Porting pattern	ISO 4401
Electrical connection	AMP