Bulletin hy14-1450-M1/us installation and Service Guide

Figure 3. Servovalve Operation - Null Position, Valve in Balance

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Bul HY14-1450-M1 BD15-BD30

Operating Pressure
Parker Hannifin Corporation

Figure 3. Servovalve Operation - Null Position, Valve in Balance
Servovalve Installation
For maximum valve and system component life, the
hydraulic system should be flushed and filtered to an
absolute filtration of 25 µm before installing the
servovalve. A flushing valve should be used in place of
the servovalve while cleaning the system. These
valves are available from Hydraulic Valve Division, as
follows:
BD15 flushing valve - PN 1200127
BD30 flushing valve - PN 1200128
To keep contaminants from entering the servovalve
and/or hydraulic system, keep the valve shipping cover
in place until immediately prior to installation. Never
leave the port surfaces uncovered and exposed to
contamination. A permanent non-bypass filter should
be installed in the system to assure that the valve
receives a clean supply of oil.
The valve should be mounted as close as possible to
the actuator or motor. It can be mounted in any plane,
but it is best to have the spool as nearly horizontal as
possible.
The servovalve should be set up for the system
operating pressure according to the instructions in the
Operating Pressure portion of the Servovalve
Maintenance section.
Installation Information
Series BD15 and BD30

Flow Control Servovalves
Bulletin HY14-1450-M1/US
Bul 1450-M1pgs.p65, dd
9
Parker Hannifin Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
After installing the servovalve, it must be determined if
the valve and its electronics are phased properly. This
can be accomplished by noting servovalve response to
a change in input command. If there is no servovalve
response, the two electrical leads to the valve must be
interchanged to correct an out-of-phase condition.

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