Bosch Rexroth DB 52 3X E Series Operating Instructions Manual page 34

34/52 Operation
Example 1 with
already existing
characteristic curve
Bosch Rexroth AG, DB(W)52...3X/..E, RE 25850-B/02.19
9.3.1 Counter pressure diagram DB(W)52...3X/..E
Diagram for determining the maximum admissible counter pressure p
discharge line at tank port T of the valve dependent on the flow q
DB(W)52...3X/..E with different response pressures p
discharge.
Table 16: Counter pressure diagram DB(W)52...3X/..E
p Response pressure in bar
A
p
Maximum admissible counter pressure in the discharge line (port T) in bar
T
q Maximum flow in l/min
Vmax
p 10 % x p (with q
T max A
Table 17: Assignment characteristic curve - response pressure p
Characteristic curve
1
2
3
4
5
6
Characteristic curves for intermediate values can be generated by interpolation.
Flow of the system / accumulator to be secured: q
Safety valve set to: p = 210 bar
A
See arrows in diagram:
p (500 l/min; 210 bar) = 10 bar
T
= 0 l/min)
v
50
110
115
210
215
315
in the
T
for valves
Vmax
with internal pilot oil
A
A
Response pressure p in bar
A
= 500 l/min
Vmax