Description
12
GA01212_002_C1 - 04/2017 - © Leybold
The compressed gas in the pump chamber is ejected through the exhaust
valve (2/10). The oil entrained in the gas is coarsely trapped in the internal
demister (2/11); there the oil is also freed of mechanical impurities. The gas
leaves the TRIVAC D 16 B Ex through the exhaust port.
During compression, a controlled amount of air - the so called gas ballast -
can be allowed to enter the pump chamber by opening the gas ballast valve.
The gas ballast stops condensation of vapours in the pump chamber up to
the limit of water vapour tolerance as specified in the technical data for the
pump.
The gas ballast valve is opened and closed by turning the gas ballast knob
(7/5) on the front.
To enable the TRIVAC D 16 B Ex to be used at intake pressures as high as
1,000 mbar, a special lubricating system was developed featuring force-lubri-
cation of the sliding bearings.
Oil filter
Gas ballast operation
Lube system
Fig. 2 Sectional drawing of the TRIVAC D 16 B Ex
1 Intake port
2 Dirt trap
3 Anti-suckback valve
4 Intake channel
5 Vanes
6 Pump chamber
7 Rotor
8 Cover plate, connection for inert gas ballast
9 Exhaust channel
10 Exhaust valve
11 Internal demister
12 Spring buckles
13 Cover plate, connection for oil filter
