Pvbs, Main Mpools For Flow Control (Standard); Pvbs, Main Spools For Flow Control (With Linear Characteristic) - Danfoss PVG 100 Technical Information

Proportional valve group

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Technical Information

PVG 100 function

PVBS, main mpools for flow control (standard)

PVG 100 Proportional Valve Group

P → A → F (Push-in)

With post-compensated valves, the A and B work port flow will depend on the pressure drop across the

main spool PVBS.

In open center systems, this pressure drop (standby-pressure) is determined by the volume of fixed pump

flow led to tank across the pressure adjusting spool in the inlet PVPF and the pressure adjusting spool

bias spring pressure. Since the pressure drop varies with pump flow volume led to tank, the A and B work

port flow will vary.

In closed center systems, the pressure drop across the main spool equals the standby setting of the

pump, measured at the P-port of the valve. The A and B work port flow will remain unchanged as long as

the standby is unchanged.

PVBS main spools with linear characteristic deliver a higher flow gain directly proportional to the linear

spool travel beyond the dead band.

520L0720 • Rev EB • Jan 2014

P → A → F (Pull-out)

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