page 47 of 80
For
condensable vapors
(water vapor, sol-
vents, etc.):
- The gas ballast valve is open if the arrow on
the gas ballast cap is pointing towards the
labelling ”GB”.
- With gas ballast valve open, the ultimate
vacuum will be reduced.
- Use inert gas for gas ballast to avoid the formation of
explosive mixtures. A special adapter fitting is needed
to connect an inert gas supply line (see ”Accessories”,
pg. 50). This adapter replaces the standard gas bal-
last cap and allows for an inert gas line to be connect-
ed via a KF DN 16 small flange at a maximum supply
pressure of 17.5 psi (1.2 bar) absolute.
- Close the gas ballast valve by turning the cap 180°.
In case of low boiling solvents (when the formation of
condensate is unlikely), the use of gas ballast might be
unnecessary. Operating the pump without gas ballast in-
creases the solvent recovery rate at the exhaust waste
vapor condenser.
Important notes concerning the operation of
the exhaust waste vapor condenser
➨
Connect the exhaust to a suitable treatment system to
prevent the discharge of dangerous gases and vapors
to the surrounding atmosphere.
+
Never block the gas outlet ((2) hose nozzle for tubing
I.D. 3/8” (10 mm)). The exhaust hose must always be
unobstructed and without back-pressure to enable an
unhindered discharge of gases.
+
Check the overpressure safety relief device (11) at the
exhaust waste vapor condenser (10) regularly; replace
if necessary. Check especially for deterioration, co-
alescence and cracks.
gas ballast
(3)
(open)
