Issue 1
4-6 Hydraulic pressure operation (PV 623)
K0457 - [EN] English
4.7 Drain all the
hydraulic fluid
In some conditions, it is necessary to fully drain the hydraulic
fluid from your PV 62x pressure station; for example:
•
if you are using water and the storage or operating
temperature is going to be less than 4°C (39°F)
•
if there is a long period of storage
•
if there is unwanted material in the hydraulic fluid
4.7.1 Preparation
To drain the instrument, we recommend these items:
•
the applicable skin and eye protection
•
a container that is large enough to hold the hydraulic fluid
and prevent contamination of the work surface
•
applicable materials to make sure the instrument and the
area stay clean; see Chapter 6 (Maintenance procedures)
4.7.2 Procedure
1
2
4
+
3
Step
Procedure (Drain all the fluid)
1.
If applicable, release the pressure (Section 4.3) and
remove the device (Section 4.4).
Note:
If it is attached, we also recommend you remove the
DPI 620 calibrator; see Chapter 5 (Pressure calibrator
operation (DPI 620)).
2.
Remove the hydraulic pressure release valve.
3.
Wind the volume adjuster wheel fully clockwise; this
moves the fluid out of the pressure mechanism.
4.
Put a container below the instrument then tilt the instrument
up until
all
the fluid has come out. To discard the hydraulic
fluid, obey all the local health and safety procedures.
Note:
Fluid comes out of the test port and the connection
for the pressure release valve.
5.
To flush out fluids that contain unwanted material, refill the
system and repeat steps 3 and 4.
Note:
To prevent contamination use only one type of
hydraulic fluid in the instrument.