Danfoss SystemStak DGM 5 Series Technical Information page 15

Operating Data
Basic Characteristics
Maximum flow
Pilot flow@ 50 °C (120 °F) and 315 bar (4500 psi)
Maximum operating pressure
Leakage flow rate @ 50 ° C (120 ° F) and 315 bar (4500 psi)
(Leakage to "Tb" around spool land @315 bar (4500 psi) Operating temperature
Weights
* Slightly higher pressure override characteristics between 70 bar (1000 psi) and 315 bar (4500 psi) inlet.
Performance Data
DGMX2 Insertion Lossess
These curves show the typical pressure drop for each flow
path in the valve. The "P" port pressure drop is the pressure
drop for flow across the reducing valve spool in the fully
open condition. The total insertion loss for the valve must be
calculated by summing the losses through each of the four
flow paths.
Flow USgpm
5 10
25
20
15
10
5
"T " port
0
20 40
DGMX2 Minimum Reduced Pressure
Flow USgpm
5 10
30
"B ", "F " & "G " models
20
10
0
20 40
Flow l/mi n
15 20 25 30
350
300
"P " port
250
200
150
"A " or
100
"B " port
50
0
60 80 100 120
Flow l/min
15 20 25 30
400
200
"A " model s
0
60 80 100 120
120 l/min (32 USgpm)
290–420 ml/min (18 in /min-26 in
3
"A" models - 70 bar (1000 psi) * (inlet pressure) 50 bar (725
(reduced pressure) "B", "F" & "G" models - 315 bar (4500 psi)
80-200 ml/min (15-12 in /min)
3
-0° to 80 °C (32 ° to 180 °F)
3,5 kg (7.7 lbs)
DGMX2 Pressure Override
These curves show the typical roll o or underride of the
di erent pressure ranges at maximum settings. Also shown
is the typical override of the relieving feature which prevents
undesirable pressure rise in the reduced pressure port.
15 10 5
350
300
250
200
150
"B " max.
100
"A " max.
50
"A " min.
0
6 0 4 0 2 0
Relieving mode
The curves (left) show the minimum reduced pressure
settings allowable for a given flow rate. The minimum
pressure setting applies regardless of inlet pressure.
Operation of the valve below minimum settings may cause
erratic valve operation due to insufficient spring force to
counter flow forces acting on the spool.
/min)
3
Flow USgpm
0 5 10 15 20 25
"G " max.
"F " max.
"B ", "F ", "G " min.
20 40 60 80 100 120
0
Reducing mod e
Flow l/mi n
psi)
30
5000
4000
3000
2000
1000
0
15