Data Sheet
Transmission Module
PVBM
Meter-In Meter-Out – Open Circuit Transmission
The Meter-in Meter-out module is designed primarily for use with transmission hydraulic motors in e.q. manlifts or demanding winch applications. The terms Meter-In and MeterOut relates to the oil flow being metered into (Meter-In) and out from (Meter-Out) the transmission motor by the PVG valve.
With the Meter-in Meter-out module both flows in and out of the transmission motors are controlled at the same time.
The Meter-in Meter-out module will ensure a stable, well controlled movement of application when motor is pushing (i.e. upwards hill) or motor being pulled (i.e. downward hill) or horizontal movement.
Features
•Integrated shock/anti-cavitation valve (A- and B- port)
•T0 connection
•BSP/UNF
•Meter-In compensator
•Meter-Out compensator on A- and B- port
•Increased control of negative loads
Comprehensive technical literature online at powersolutions.danfoss.com
© Danfoss | Mar 2017 |
L1117392 | AI00000124en-US0303 | 1 |
Data Sheet
Transmission Module PVBM
Schematic |
Available spools |
|
A B
T0 |
|
|
LS |
|
|
T |
P |
V310 310.A |
|
|
Flow |
Function in |
Flow l/min |
Part Number |
Characteristic |
Neutral |
(Symmetrical) |
|
Progressive |
Closed neutral |
5 |
11187198 |
|
|
|
|
|
|
10 |
11185988 |
|
|
|
|
|
|
25 |
11186235 |
|
|
|
|
|
|
40 |
11186436 |
|
|
|
|
|
|
65 |
11186450 |
|
|
|
|
|
|
100 |
11156265 |
|
|
|
|
|
|
130 |
11156268 |
|
|
|
|
Linear |
Closed neutral |
10 |
11187177 |
|
|
|
|
|
|
25 |
11187390 |
|
|
|
|
|
|
40 |
11187500 |
|
|
|
|
|
|
65 |
11187659 |
|
|
|
|
|
|
100 |
11156300 |
|
|
|
|
Available modules
Description |
BSP G1/2 ports Code |
SAE 7/8-14 ports |
|
No. |
Code No. |
PVBM module |
157B6268 |
11018399 |
Application Awareness
•With the Meter-In Meter-Out module, stability is determined by ensuring that oil flow into the system is always lower than oil flow out of the system. This is achieved by means of different spring settings in the Meter-In Meter-Out compensators. As an example, this means that a motor will run faster in Meter-Out mode than in Meter-In mode.
•Due to the Meter-out compensators, a backpressure valve is needed to avoid cavitations when running in meter-out situations. The back pressure setting would be application dependent but typical values are between 5-10 bar. Increased back pressure setting ensures better protection against cavitations but also decrease energy efficiencies. The hydraulic system would be leaking in neutral when external forces acts on the working ports. To avoid unwanted movements of the applied motors, therefore external brakes are needed.
•Dependent on the application type smooth movement could be requested. PVE’s in combination with a controller and joystick could be useful to add ramps on the spool and delay on the motor brakes so it doesn’t hit the brakes too hard when returning to neutral.
2 | © Danfoss | Mar 2017 |
L1117392 | AI00000124en-US0303 |
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