VANE PUMP PV7-2X/20-25RA01MA0-05
Manufacturer: Bosch Rexroth
Material #: R900950954
Model : PV7-2X/20-25RA01MA0-05
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth PV7-2X/20-25RA01MA0-05 (R900950954) is a high-performance variable displacement vane pump designed for industrial applications requiring precise hydraulic fluid control within an open loop system. This pump is characterized by its exceptional reliability, low noise generation, minimal pulsation, and high efficiency. The quick response behavior of the controller ensures that operational demands are met with accuracy and speed.
Crafted for longevity, the PV7-2X/20-25RA01MA0-05 features hydrodynamically lubricated plain bearings which contribute to an extended lifecycle. The pump's design also includes NBR seals which are compatible with a range of hydraulic fluids such as HLP, HLPD, HVLP, and HVLPD. With its clockwise rotation and absence of through-drive, this model maintains a streamlined operation.
The technical specifications highlight the pump's capability to handle a maximum pressure and deliver a maximum flow within its size category. The speed range of this model is defined by its minimum and maximum rotational speeds which dictate the flow dynamics alongside its variable displacement feature.
Bosch Rexroth has equipped this pump with a set screw for limiting maximum flow, ensuring precise control over the hydraulic output. The suction and displacement procedures are facilitated by an intelligently designed arrangement of vanes, rotor, stator ring, control plate, and cover which work in unison to transport the hydraulic fluid efficiently.
In terms of pressure control, the stator ring adjusts based on spring force settings corresponding to desired operating pressures. This mechanism allows for consistent system pressure maintenance while minimizing power loss and reducing fluid heating.
The PV7-2X/20-25RA01MA0-05 stands out for its low flow pulsation properties and high repetition accuracies with reduced pressure peaks during down control. Its noise levels are optimized through height adjustment screw tuning contributing to quieter operations—a significant advantage in noise-sensitive environments.
$3,372.00 USD
More are expected on September 27, 2024
Status: This product is temporarily out of stock.
Qty: Delivered as early as September 27, 2024 when ordered in
This product is eligible for factory repair.
Variable displacement pump, size 25 ccm, pressure 50 bar for industrial applications, open circuit
High reliability. Low noise and low pulsation level. High efficiency. Quick response behavior of the controller.
Unpacked Weight: 11.34 kg
Very short control times Low operating noise Mounting and connection dimensions according to VDMA 24560/1 and ISO 3019-2 Good efficiency Long life cycle Variable displacement
Hydraulic pumps of type PV7...A are direct operated vane pumps with adjustable displacement.
They basically comprise of housing (1), cover (2), rotor (3), vanes (4), stator ring (5), compression spring (6), set screw (7) and control plate (8).
For limitation of the maximum flow, the pump is equipped with a set screw (9).
The driven rotor (3) rotates within the stator ring (5). The centrifugal force presses the vanes (4) guided in the rotor (3) against the internal sliding surfaces of the stator ring (5).
Suction and displacement procedure
The cells (10) necessary to transport the hydraulic fluid are formed by the vanes (4), the rotor (3), the stator (5), the control plate (8) and the cover (2).
The cell volume increases by the rotation of the rotor (3) and via the suction channel (S), the cells (10) are filled with hydraulic fluid. When the largest cell volume is achieved, the cells (10) are separated from the suction side.
If the rotor (3) is rotated further, connection to the pressure side is established, the cells narrow and displace the hydraulic fluid via the pressure channel (P) into the system.
Pressure control
The stator ring (5) is held in the eccentric initial position by the spring (6). The maximum operating pressure required in the system is set at the set screw (7) using the spring (6).
The pressure building up by the load resistance acts at the pressure side on the inner sliding surface of the stator ring (5), against the force of the spring (6).
If the pressure corresponding to the set spring force has been reached, the stator ring (5) is pushed out of its eccentricity in zero position direction. The flow settles at the set value which is just removed. If the peak pressure set at the spring (6) is reached, the pump controls the flow to almost zero. The operating pressure is maintained and only the leakage is replaced. In this way, the power loss and heating of the hydraulic fluid are kept to a minimum.
PV7-1X/06…A…
PV7-2X/20…A…
Thanks to their specific design, PV7-type vane pumps with adjustable displacement boast low flow pulsation and achieve very high repetition accuracies with low pressure peaks during the down control. The noise optimization achieved by adjusting the height adjustment screw provides for a low operating noise. Hydrodynamically lubricated plain bearings ensure a long life cycle.
PV7‒../06-10
PV7‒../06-10....A0-05...
PV7‒../06-10....A0-10...
Sound pressure level
Notice
Characteristic curves measured with n = 1450 min-1; ν = 41 mm2/s; θ = 50 °C
Sound pressure level measured in the sound measuring chamber according to DIN 45635, sheet 26; distance: Microphone ‒ Pump = 1 m
PV7‒../06-14
PV7‒../06-14....A0-04...
PV7‒../06-14....A0-07...
Sound pressure level
Notice
Characteristic curves measured with n = 1450 min-1; ν = 41 mm2/s; θ = 50 °C
Sound pressure level measured in the sound measuring chamber according to DIN 45635, sheet 26; distance: Microphone ‒ Pump = 1 m
PV7‒../20-20
PV7‒../20-20....A0-05...
PV7‒../20-20....A0-10...
Sound pressure level
Notice
Characteristic curves measured with n = 1450 min-1; ν = 41 mm2/s; θ = 50 °C
Sound pressure level measured in the sound measuring chamber according to DIN 45635, sheet 26; distance: Microphone ‒ Pump = 1 m
PV7‒../20-25
V7‒../20-25....A0-05...
V7‒../20-25....A0-10...
Sound pressure level
Notice
Characteristic curves measured with n = 1450 min-1; ν = 41 mm2/s; θ = 50 °C
Sound pressure level measured in the sound measuring chamber according to DIN 45635, sheet 26; distance: Microphone ‒ Pump = 1 m
The control times apply to the shown measurement set-up.
With different set-ups and other line lengths, the control times change, as well.
Circuit diagram
|
1 |
Directional valve (switching time duration 30 ms) |
|
2 |
Throttle for setting the pressure during displacement |
|
3 |
Hydraulic pump |
|
4 |
pressure tapping point |
Down control
qv displacement → qv zero stroke
|
Pump type |
Pressure |
Control times (average) |
||
|
pnbar |
pmax 1) |
t1 down |
t2 down |
|
|
06-10...10 |
100 bar |
150 bar |
85 |
90 |
|
06-10...05 |
50 bar |
130 bar |
70 |
110 |
|
06-14...07 |
70 bar |
130 bar |
80 |
100 |
|
06-14...04 |
40 bar |
100 bar |
65 |
90 |
|
20-20...10 |
100 bar |
170 bar |
80 |
125 |
|
20-25...10 |
100 bar |
170 bar |
80 |
125 |
|
20-25...05 |
50 bar |
120 bar |
60 |
85 |
| 1) | Admissible pressure peaks |
Up control
qv zero stroke → qv displacement
|
Pump type |
Pressure |
Control times (average) |
|
|
pnbar |
t1 up |
t2 up |
|
|
06-10...10 |
100 bar |
35 |
60 |
|
06-10...05 |
50 bar |
20 |
30 |
|
06-14...07 |
70 bar |
30 |
50 |
|
06-14...04 |
40 bar |
20 |
35 |
|
20-20...10 |
100 bar |
25 |
45 |
|
20-25...10 |
100 bar |
25 |
45 |
|
20-25...05 |
50 bar |
20 |
40 |
PV7-../06
Dimensions in mm
|
1 |
Flow control |
|
2 |
Pressure adjustment by means of set screw (standard), ordering code ...0... |
|
3 |
Lock (optional), ordering code ...3... |
|
4 |
Space required to remove the key |
Ports
|
Denomination |
Size |
|
|
S |
Suction port |
G1/2 |
|
P |
Pressure port |
G3/8 |
|
L |
Leakage connection |
G1/4 |
Adjustment information
Flow control (1)
with clockwise rotation, reduction of the flow with counterclockwise rotation, increase in flowPressure adjustment (2)
with clockwise rotation, increase in the operating pressure with counterclockwise rotation, reduction of the operating pressurePV7-../20
Dimensions in mm
|
1 |
Flow control |
|
2 |
Pressure adjustment by means of set screw (standard), ordering code ...0... |
|
3 |
Lock (optional), ordering code ...3... |
|
4 |
Space required to remove the key |
Ports
|
Denomination |
Size |
|
|
S |
Suction port |
G3/4 |
|
P |
Pressure port |
G1/2 |
|
L |
Leakage connection |
G1/4 |
Adjustment information
Flow control (1)
with clockwise rotation, reduction of the flow with counterclockwise rotation, increase in flowPressure adjustment (2)
with clockwise rotation, increase in the operating pressure with counterclockwise rotation, reduction of the operating pressureFluid tank
Adjust useful volume of the tank to the operating conditions. The admissible fluid temperature must not be exceeded; use coolers, if necessary.
Lines and connections
Remove the protective plug at the pump. We recommend using seamless precision steel pipes according to DIN 2391 and releasable pipe connections. Select the inner width of the pipes according to the connections. Pipelines and fittings must be carefully cleaned before assembly.Proposal for piping layout
Minimum dimensions [mm]
Lay the leakage line so that the pump cannot run empty! Leakage and return fluid must not be directly sucked in again under any circumstances!
Filter
Use a return flow or pressure filter, if possible.
(Suction filters only in connection with underpressure switch / clogging indicator).
Hydraulic fluid
Please observe our provisions according to data sheet 90220. We recommend brand hydraulic fluids Different hydraulic fluid types must not be mixed as this might result in degradation and deterioration of the lubricity. According to the operating conditions, the hydraulic fluid must be renewed at certain time intervals. In this connection, it is also necessary to clean the hydraulic fluid tank from residues.Drive
Electric motor + pump carrier + coupling + pump
No radial and axial forces on the pump drive shaft admissible! Motor and pump must be exactly aligned! Use a torsionally flexible coupling.
Installation positions
Horizontal position preferred
B3
B5
V1
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