Maintenance / Repair - VERDER VERDERAIR HC-PURE FD Series Manual

MAINTENANCE / REPAIR

Flushing and storage
Flush the pump often enough to prevent fluid you
are pumping from drying or freezing in the pump
and damage it. Always flush the pump follow
the Pressure relief procedure on page 10 before
storing it for any length of time. Use a compatible
flushing agent. Flush the pump long enough to
be sure it is completely free from any previously
pumped liquid.
Tightening treaded connections
Before each use, check all hoses for wear or
damage and replace as necessary. Check to be
sure all threaded connections are tight and leak-
free. Tighten and retorque the pump if necessary.
Use torque values on page 22.
Preventive maintenance schedule
Establish a preventive maintenance schedule,
based on the pump's service history. This is
especially important for prevention of spoils or
leakage due to diaphragm failure.
Disassembly
IMPORTANT:
Follow the pressure relief procedure at
page 10 before starting to work at the
pump!
After a diaphragm rupture always make
sure no liquid is left at the air side of the
pump. Especially the muffler (07) have to be
checked before opening the pump.
Every VA-HCP pump is delivered with an AV (Air
Valve) tool (Figure 7a, 7b, 7c, 7d ) which has on
side pins to disassemble the air valve (27) and the
opposite side can be used to push out the outer
part of air valve from the center housing.
Disassembly of the side housings
To have access the internal parts of the pump, it
must be dismantled first. Unscrew the bolts on the
assembly pins (23), remove the spring washers,
than slide the side housings (2) apart a little and
remove the manifolds (3). Take care not to damage
the thread of the manifolds. Next remove the side
housings completely. Remove the assembly pins
(23) from the center housing and diaphragms.
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21-VA-MA_Manual_HC-PURE FD _en | 26.05.2023
Figure 3a
Figure 3b
Figure 3c
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