Selection Of Shutoff Valves - Siemens SINUMERIK 840D Description Of Functions

02.99
Table 2-9 Size 6 high-response valves, directly actuated
Bosch Q (l/min)
nom
order number at 35 bar
(100%)
0 811 404 720 40
0 811 404 721 24
0 811 404 722 12
0 811 404 723 8
0 811 404 725 15
0 811 404 726 25
0 811 404 727 40
0 811 404 728 A:40; B:20
Table 2-10 Size 10 high-response valve, pilot-actuated
Bosch Q (l/min)
nom
order number at 5 bar
(100%)
0 811 404 693 40
0 811 404 694 70
0 811 404 695 A:40; B:20
0 811 404 696 A:70; B:40
Table 2-11 Size 16 high-response valves, pilot-actuated
Bosch Q (l/min)
nom
order number at 5 bar
(100%)
0 811 404 296 90
0 811 404 297 150
0 811 404 298 A:90; B:50
0 811 404 299 A:150; B:90
1) Asymmetrical characteristic
2.3.3

Selection of shutoff valves

General
 Siemens AG 2000. All rights reserved
SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
Characteris- No. of
tic kneepoint connec-
(%) tor pins
linear 12-pin
linear
linear
linear
60
60
40
1)
40
Characteris- No. of
tic kneepoint connec-
(%) tor pins
40 12-pin
40
1)
40
1)
40
Characteris- No. of
tic kneepoint connec-
(%) tor pins
40 12-pin
40
1)
40
1)
40
References: Bosch BEY 010/4
Additional shutoff valves, mounted as an intermediate plate below the servo
solenoid valve, ensure that the drive is switched on and off safely and prevent
backlash on transition from the "fail-safe" position to mid-position and vice
versa.
With external loads (vertical mounting), shutoff valves can prevent any inadver-
tent cylinder movement (downwards) when the control loop is not active.
2.3 Configuring the hydraulic drive
Graphic symbol
A B B
HRV – Size 6
P T P T
Graphic symbol
A B
X X P T P T Y Y
Graphic symbol
A B
X X P T P T Y Y
2 Configuring
Bosch
catalog
BEY 013/31
S
Bosch
catalog
BEY 013/31
Bosch
catalog
BEY 013/31
2-39