Bosch Rexroth A2FM series Instruction Manual page 26

26 A2FM for explosive areas | Axial piston fixed motor
Counterbalance valve BVD
Dimensions
A2FM Counterbalance valve
NG Type
28, 32 BVD20..16
45 BVD20..16
56, 63 BVD20..17
80, 90
BVD20..27
107, 125 BVD20..28
107, 125
BVD25..38
160, 180 BVD25..38
Ports
A, B Working line
S Infeed
Br Brake release, reduced high
pressure
G
Brake release, high pressure
ext
M , M Pressure measurement
A B
A and B
Mounting of the counterbalance valve
When delivered, the counterbalance valve is mounted to the
motor with two tacking screws (transport protection). The
tacking screws may not be removed while mounting the work‑
ing lines! If the counterbalance valve and motor are delivered
separately, the counterbalance valve must first be mounted to
the motor port plate using the provided tacking screws.
For notes on tightening torques, see the instruction manual
1)
Momentary pressure spikes may occur depending on the application.
2)
Keep this in mind when selecting measuring devices and fittings.
Bosch Rexroth AG, RE 91001-01-X-B2/01.2016
B1
B3
T
M
B
B4
Y
Ports Dimensions
A, B B1
3/4 in 209
3/4 in 222
3/4 in 250
1 in 271
1 in 298
1 1/4 in 298
1 1/4 in 332
Version
BVD20
BVD25
L
S
S
A,B
B2 B3 B4 (S)
175 174 142
196 187 142
197 208 142
207 229 142
238 251 142
239 251 158
260 285 158
Standard Size 1)
SAE J518 see table above
DIN 3852 3) M22 × 1.5; 14 deep
DIN 3852 3) M27 x 2; 16 deep
DIN 3852 M12 × 1.5; 12.5 deep
3)
DIN 3852 3) M12 × 1.5; 12 deep
DIN 3852 3) M12 × 1.5; 12.5 deep
ISO 6149 3) M12 × 1.5; 12 deep
The counterbalance valve is finally mounted to the motor by
screwing on the SAE flange
The screws to be used and the instructions for fitting can
be found in the instruction manual.
The spot face can be deeper than as specified in the standard
3)
O = Must be connected (plugged on delivery)
4)
X = Plugged (in normal operation)
Dimensions [mm]
View Y
B
G
ext
A
B4 (L) B5 B6
147 139 98
147 139 98
147 139 98
147 139 98
147 139 98
163 175 120.5
163 175 120.5
p [bar] 2) State
max zul
420 O
30 X
30 X
30 O
30 O
420 X
420 X
B7
66
66
75
75
84
84
84
4)