Danfoss PVBM Data sheet

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 Meter- Out 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 B­port

•

Increased control of negative loads

Comprehensive technical literature online
at powersolutions.danfoss.com

©

Danfoss | Mar 2017 L1117392 | AI00000124en-US0303 | 1

A B

T P

LS

T0

V310 310.A

Data Sheet

Transmission Module PVBM

Schematic

Available spools

Flow
Characteristic

Progressive Closed neutral 5 11187198

Linear Closed neutral 10 11187177

Function in
Neutral

Flow l/min
(Symmetrical)

10 11185988
25 11186235
40 11186436
65 11186450
100 11156265
130 11156268

25 11187390
40 11187500
65 11187659
100 11156300

Part Number

Available modules

Description BSP G1/2 ports Code

No.

PVBM module 157B6268 11018399

SAE 7/8-14 ports
Code No.

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