Suction Regulators - Datex-Ohmeda S/5 Avance Technical Reference Manual

2.10.3 Suction
regulators
Venturi Drive Gas
Air or O
Figure 2-23 • Venturi suction
1009-0357-000 11/03
Pipeline vacuum
The suction regulator (shown in Figure 2-22) uses an external vacuum source.
Venturi Drive vacuum
The suction regulator (shown in Figure 2-23) uses an internal, venturi derived vacuum
source.
Drive gas (internally plumbed Air or O
(A). As the drive gas passes through the venturi module, a vacuum is created at port B.
The drive gas exits the venturi module at port C and is exhausted outside the machine
through the muffler (D).
The control port (E) on the venturi module responds to pneumatic signals from the front
panel switch on the Suction Control Module (SCM) to turn the venturi vacuum drive gas
on or off. The check valve (CV) helps prevent pressurization of the suction circuitry if the
exhaust is occluded or the venturi unit fails.
E
A
2
B
VM
C
) enters the Venturi Module (VM) at the drive port
2
CV
2 Theory of Operation
SCM
Suction
D
2-23