VA-P_man_Rev06-2013_UK_(uk) | 18.06.2013
9
Air Exhaust Ventilation
Do not restrict the air exhaust port.
Excessive exhaust restriction can cause
erratic pump operation. At a diaphragm
rupture, it is possible the pumped liquid
will escape through the muffler. To prevent
this, the optional diaphragm monitoring
and barrier chamber can be used. Another
possibility is to remote the air exhaust to a
safe environment.
Fluid suction line
1. A shut of valve should be installed just
before the pump to isolate the pump
from the system for maintenance and
installation.
2. Always use a flexible connection to avoid
vibrations being brought into the piping
system.
3. Use a suction line which can stand
vacuum. By the pumping action, vacuum
will be created at the suction side of the
pump.
4. The inner diameter of the hose should be
equal to the connection diameter of the
pump.
5. If the inlet pressure to the pump is more
than 25% of the outlet working pressure,
the ball check valves will not close fast
enough, resulting in inefficient pump
operation and is a possible cause of noise.
6. Inlet pressure greater than 1 bar (15 PSI),
diaphragm life will be shortened.
Fluid outlet line
1. A shut of valve should be installed just
after the pump to isolate the pump
from the system for maintenance and
installation. A drain valve should be
installed to relief the pressure of the pump
before starting maintenance work at the
pump.
2. Always use a flexible connection to avoid
vibrations being brought into the piping
system.
Fluid inlet and outlet ports
1. VA-P series of pump are having the
suction and discharge connections
integrated in the centre block. Both
connections possibilities: horizontal
and vertical are always available. VA-P
pumps are delivered as standard with
the horizontal connections open and the
vertical connections plugged. See figure 2.
2. By rotating the center housing 180° and
by changing the postion of the centre
plug, other porting combinations are
possible :
Installation remarks
1. VA-P pumps must be installed load free
to avoid possible damage of pumps
and/or installation.
2. VA-P pumps will be delivered with blind
plugs to prevent dust or other materials
to enter the pump. Those plugs have to
be removed before installing the pump!
3. As UV – radiation can damage
Polyethyene. This must taken in account
by installing VA-P pumps made out of
Polyethylene. (pump codes VA-Pxx EE
and VA-Pxx GG)
4. The air-valves used in VA-P pumps are
manufactured with tight tolerances. They
should be used with clean, dry and oil-
free compressed air. If the quality of
the compressed air at the place where
the pump is installed is not optimal, it is
possible to install a dryer and/or a water
separator. Please contact your distributor
for more detailed information.
Figure 2
