The characteristics in this catalog are typical measured results. During measuring a mineral based
hydraulic oil with a viscosity of 21 mm
2
/s [102 SUS] at a temperature of 50°C [122°F] was used.
PVPF, pump side module
Pressure relief valve characteristic in PVP
Neutral flow pressure in PVP, open center
50
100
300 l/min
0
0
5
30
bar
Q
p
T
P
20
25
15
10
150
250
200
20 bar spring
[290 psi spring]
12 bar spring
[174 psi spring]
PVPE
PVPH
psi
∆
p
∆
p
0
Q
p
0
155B390.11
80 US gal/min
400
300
100
200
10
20
30
40
70
60
50
The pressure relief valve is set at an oil flow of 15 l/min [4 US gal/min]. Setting range: 30 to 350 bar [435 to
5075 psi].
Open center flow rating
The flow rating of the different main spools will depend on the standby pressure available. In open center
systems, the standby pressure equals the pressure drop P–>T, see
the diagram above
. A pump flow of 150
l/min led to tank across the pressure adjusting spool, will generate a standby pressure of app. 15 bar (PVP
with 12 bar spring). The according main spool flow ratings will correspond to the curves.
For PVPs with a 20 bar spring, the standby pressure available will be 20 bar or higher. Hence the
according main spool flow ratings will correspond.
Closed center flow rating
The flow rating of a the different main spools, PVBS, is dependent upon the Load Sense margin (pump
margin pressure). The nominal flows specified for each PVBS is specified at 15 bar [218 psi] Ls margin
pressure. If LS margin is increased above 15 bar [218 psi], the PVBS will deliver more flow then the
nominal rating. The following curves show the relationship between LS margin and work port flow.
Technical Information
PVG 100 Proportional Valve Group
Technical characteristics
28 |
©
Danfoss | May 2018
520L0720 | BC00000039en-US0502
