Bosch Rexroth BVD 52 Series Bedienungsanleitung

RE 95528/05.2016, Bosch Rexroth AG

Contents

Type code 2

Technical data 4

Characteristic curves for counterbalance spool 33 5

Functional description 6

Example applications 7

Dimensions 8

BVE installation variants for winch drives 11

Mounting of the counterbalance valve 12

Project planning notes 13

Safety instructions 15

Features

▶ Damping for stable lowering and safe downhill movement

▶ Simple adaptation to application

▶ Compact design and direct mounting to axial piston

motors A6VM and A6VE

▶ Available in a set with axial piston motors A6VM and A6VE

▶ Standard working ports according to SAE J518

▶ Integrated brake release port, with or without pressure

reduction

▶ Good eﬃciency through reduced ﬂow losses

▶ Four working ports (see type code, pos. 04)

▶ Rotationally symmetric

▶ Suitable for high ﬂow rates

▶ Size 32

▶ Nominal pressure Motor side 450bar

Pump side 350bar

▶ For winches and track drives in open circuit

Counterbalance valve

BVD/BVE Series 52

RE 95528

Edition: 05.2016

Bosch Rexroth AG, RE 95528/05.2016

2BVD/BVE Series 52 | Counterbalance valve

Type code

Valve type

01 Counterbalance valve, double-acting BVD

Counterbalance valve, one-sided BVE

Size

02 Flow, nominal qv nom 650l/min 32

Control range BVD BVE

03 Start/end of opening of counterbalance spool

(spring value without return ﬂow pressure)

20 to 38bar ● ● W

10 to 30bar ● –V

Working port SAE J518 Hole distance

04 1 1/4in 84mm 38

1 1/4in 104mm (bearing 90° oﬀset)1) 31

Ports for brake release

05 With high pressure S

With reduced high pressure 21+4bar (brake release valve) L2)

Series

06 Series 5, index 2 52

Version of port and fastening threads

07 Metric, port threads with proﬁled sealing ring according to DIN 3852 N

Long spring cover (see page 11)

08 On port side C, lift via port CC

On port side D, lift via port DD

Seal

09 FKM (ﬂuoroelastomer) V

Counterbalance spool

10 Version 33 33

Opening characteristics of counterbalance spool

11 Standard 0

Residual opening in counterbalance spool

12 Without K00

Damping D1 (channel to counterbalance spool)

13 BVE Throttle pin installed on port side CC4599

Throttle pin installed on port side DD4599

BVD Throttle pin, comparative diameter Inlet Outlet

0.4mm 2.0mm D4599

0.4mm 0.7mm D4580

●= Available –= Not available

1) The screws are not included in the scope of delivery. These can be

supplied by Bosch Rexroth on request.

2) On request

Type code

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15

/ 52 – V 0 1 K00 T03 –

RE 95528/05.2016, Bosch Rexroth AG

Counterbalance valve | BVD/BVE Series 52

Type code

Damping D2 (reservoir outlet)

14 Without T00

With oriﬁces on port side Cand Dø0.3mm (D1 max. D45XX) T03

With oriﬁce installed on port side CC03

With oriﬁce installed on port side DD03

Standard / special version

15 Standard version 0

Standard version with installation variant, e.g. ports open or closed, contrary to standard Y

Special version S

●= Available –= Not available

Notice

▶ Note the project planning notes on page 13.

▶ In addition to the type code, please specify the relevant

technical data when placing your order.

01 02 03 04 05 06 07 08 09 10 11 12 13 14 15

/ 52 – V 0 1 K00 T03 –

Bosch Rexroth AG, RE 95528/05.2016

4BVD/BVE Series 52 | Counterbalance valve

Technical data

Hydraulic ﬂuid

The axial piston motor used is decisive for the selection of

hydraulic ﬂuid. For further information, please refer to our

data sheets during project planning.

Note: At no point of the component may the temperature

be higher than 115°C.

Working pressure range

Pressure at working port

C/D (onthe pump side) or

C´/D´ (on the motor side)

Deﬁnition

Nominal

pressure

pnom

On the pump side:

350 bar

On the motor side:

450bar

The nominal pressure

corresponds to the maximum

design pressure.

Maximum

pressure

pmax

On the pump side:

400

bar1)

On the motor side:

500bar

Restrictions:

▶ maximum acceleration 7g

▶ maximum 1 million load

changes

Determination of cracking pressure p1(values without

return ﬂow)

The throttle chain from D1and D2is used to damp the

opening and closing speeds of the counterbalance spool.

The actual pump pressure is reduced by the throttle chain

from D1and D2and controls the counterbalance spool.

▼ Circuit diagram BVD

MKC

MKD

Gext

G´

L´

D´

C´

Port side

(onthe pump

side)

Counterbalance

spool

Motor side

Table of values

Valve type BVD...W BVD...V BVE...W

Nominal pressure pbar On the

pump side

350 350 350

motor side 450 450 450

Flow, nominal qv max l/min 650 650 650

Start of opening of counterbalance spool at port MKΔpK B bar 20 10 20

End of opening of counterbalance spool at port MKΔpK E bar 38 30 38

Pressure reducing valve for

brake release (ﬁxed setting)

Maximum control pressure pbar BVE...L/ 21+4 21+4 21+4

Beginning of control pbar BVE...L/ 10+4 10+4 10+4

Weight approx. mkg 37 37 42

Notice

▶ Theoretical values, without eﬃciency and tolerances;

values rounded

▶ Exceeding the maximum or falling below the minimum

permissible values can lead to a loss of function,

areduction in operational service life or total

destruction of the valve.

1) With versions “T03”, “C03” and “D03” (concerns damping “D2”,

forreservoir outlet), pressures that are higher than the nominal

pressure are not permitted

RE 95528/05.2016, Bosch Rexroth AG

Counterbalance valve | BVD/BVE Series 52

Characteristic curves for counterbalance spool 33

▼ Pressure diﬀerential at the outlet (via valve spool) D´ D

orC´ C working port at rear (38)

100 200 300 400 500 600 650

Flow qV[l/min]

Pressure diﬀerential ∆p [bar]

▼ Pressure diﬀerential at the inlet (via check valve) C C´ or D D´

working port at rear (38)

100 200 300 400 500 600 650

Flow qV[l/min]

Pressure diﬀerential ∆p [bar]

The above parameters are based on:

▶ Oil viscosity ν=approx.21mm2/s

▶ Oil temperature ϑ=50°C

▶ Counterbalance spool fully open

Notice

▶ Pressure Δp of approx.20 to 50bar is normal for deter-

mining the maximum ﬂow in winch drives.

▶ If the desired ﬂow (pressure diﬀerence) does not

match the counterbalance spool described here,

please contact us.

▼ Pressure diﬀerential

D´ D or C´

(

via valve spool

)

with working port oﬀset by 90° (31)

100 200 300 400 500 600 650

Flow qV[l/min]

Pressure diﬀerential ∆p [bar]

▼ Pressure diﬀerential

C C´ or D D´

(via check valve),

with working port oﬀset by 90° (31)

100 200 300 400 500 600 650

Flow qV[l/min]

Pressure diﬀerential ∆p [bar]

Bosch Rexroth AG, RE 95528/05.2016

6BVD/BVE Series 52 | Counterbalance valve

Functional description

Counterbalance valves are designed to reduce the danger of

overspeed and cavitation of axial piston motors in open cir-

cuits. Cavitation occurs if, during braking or load-lowering, the

rotational speed of the motor is greater than it should be for

the given inlet ﬂow, causing the supply pressure to fall

sharply. If the supply pressure drops below the given value

∆pKE, the counterbalance spool will move towards the close

position. The cross-sectional area in the counterbalance valve

return channel is then reduced, creating a bottleneck in the

return ﬂow of the hydraulic ﬂuid. The pressure increases and

brakes the motor until the rotational speed of the motor

reaches the speciﬁed value for the given inlet ﬂow.

The counterbalance valve is available in two versions.

BVD: Throttling eﬀect in both ﬂow directions, e.g. for moving

forward and backward

BVE: Throttling eﬀect in one ﬂow direction, e.g. for lowering

with pulling loads

See BVE circuit diagram on page 7

Brake release

Version S

Counterbalance valve with shuttle valve and port Gext

(plugged), without brake release valve (pressure reduction).

The respective high pressure is balanced via the shuttle

valve and is available at port Gext for venting the mechanical

holding brake. The brake vent function without pressure

reduction via the brake release valve is only employed if the

mechanical holding brake is approved for the maximum

working pressure.

▼ Circuit diagram BVD...S

Motor side

MKC

MKD

Gext

G´

L´

D´

C´

Counterbalance

spool

Port side (on

the pump side)

Version L

Counterbalance valve with shuttle valve, brake release valve

for pressure reduction and portBr (plugged).

The respective high pressure is balanced and fed to the

brake release valve (pressure reducing valve) via the shuttle

valve. This opens from approx. 10bar and reduces the

respective working pressure to approx. 21+4bar. This brake

vent function is employed when the mechanical brake on the

gear unit cannot handle the full system pressure.

The maximum permissible brake release pressure must be

agreed with the winch or track drive manufacturer

RE 95528/05.2016, Bosch Rexroth AG

Counterbalance valve | BVD/BVE Series 52

Example applications

Variable motor with integrated pressure relief valve in the port plate and mounted counterbalance valve.

Counterbalance valve for size 32 winches, without brake release valve (S), with counterbalance spool (pos. 10), without internal

residual opening (K00, mandatory for winches), with weak damping (D4599). E.g.: A6VM215HP5D1P001B/71MWV0S4A29W0-0

BVE32W38S/52ND-V330K00C4599D03S00 mounted to a Rexroth winch gearbox

Winch drive application

▶ Circuit diagram example for winch drive in cranes (BVE)

Vg min

Vg max

MKC

Gext

MKC

D´

C´

G´

L´

MKD

L´

As an alternative to the above example, other Bosch Rexroth axial piston motors (A6VM and A6VE) can also be used.

Track drive application

▶ Circuit diagram example for track drive in excavator crawlers (BVD)

Vg min

Vg max

MBG´

L´

X1X

MKC

MKD

Gext

Bosch Rexroth AG, RE 95528/05.2016

8BVD/BVE Series 52 | Counterbalance valve

Dimensions

Dimensions [mm]

Dimensions

Long spring cover on port side C, lift via port C

66.7

MKC MKD

GEXT

G´

(L)

L´

MKC MKD

GEXT

M14 M14

MKC

31.8

473.4+3 (BVE)

405.6+3

364.6+2(BVD)

250

3838

174+3

6×ø15 2×ø6.4

o98

154-0.5

101

174+2

158.5-1

158.5+3

130+3

291+2

M61)

C´ D´

Gext

Detail X

With shuttle valve

and port Gext (version S)

1) DIN912

RE 95528/05.2016, Bosch Rexroth AG

Counterbalance valve | BVD/BVE Series 52

Dimensions

Dimensions [mm]

Long spring cover on port side D, lift via port D

MKC MKD

G´

(L)

L´

MKC MKD

GEXT

MKC

C´ D´

o98

154-0.5

101

M61)

158.5-1

158.5+3

M61)

291+2

174+2

130+3

M14 M14

3838

174+3

GEXT

6×ø15 2×ø6.4

31.8

66.7

473.4+3 (BVE)

405.6+3

364.6+2(BVD)

250

Gext

Detail X

With shuttle valve

and port Gext (version S)

1) DIN912

Bosch Rexroth AG, RE 95528/05.2016

10 BVD/BVE Series 52 | Counterbalance valve

Dimensions

Dimensions [mm]

Ports Standard Size pmax [bar]1) State5)

C, D Working port

Fastening thread

SAE J5182)

DIN13

11/4in

M14×2; 19 deep

400 O

Gext Brake release, high pressure DIN 38523) M14×1.5; 12deep 400 X

C´, D´ Working channel to motor4) ø32 500 O

G´ Balanced high pressure, channel to motor4) ø4.2 400 O

L´ Drain channel to motor4) ø4.2 10 O

VFThreaded plug for ﬁlter channel4) DIN 6149 M16×1.5; 13deep 400 X

MKMeasuring pressure in counterbalance spool DIN 38523) M14×1.5; 12deep 400 X

1) Depending on the application, momentary pressure peaks can occur.

Keep this in mind when selecting measuring devices and ﬁttings.

Only dimensions according to SAE J518, metric fastening thread

isa deviation from the standard.

3) The countersink can be deeper than as speciﬁed in the standard.

4) No customer ports. Subject to technical change

5) O=Must be connected (plugged when delivered)

X=Plugged (in normal operation)

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