Sheldon SHEL LAB SVAC1, Installation And Operation Manual, Page: 32 / 78

32 | P a g e
INSTALLATION
C
ONNECT TO THE
V
ACUUM
S
UPPLY
Use clamps to secure the tubing to the Vacuum and Vent Ports.
Oven Chamber Ports – Left to Right
•
Vent Port ( Backfill Inlet) – 1/4 inch (6.35 mm) OD
o External atmosphere backfills the oven chamber through this port when the Vent
Valve control on the front control panel is opened.
o A clean or inert gas supply source may be connected to this port. The maximum
allowed delivery pressure at the port is 15 psi .
•
Vacuum Port – 3/8 inch (9.52 mm) OD
o The chamber atmosphere is evacuated through this port. Connect the vacuum
source to the oven here.
o This port is opened and closed by the Vacuum Valve control on the front control
panel.
•
KF-25 Vacuum Port
o Comes with a clamp and blank.
o
Used for introducing thermocouple probes through a vacuum-rated feedthrough.
o
A vacuum supply can be connected to the KF-25 port for increased efficiency in
vacuuming down the chamber. However, the Vacuum Valve control on the front
control panel will not affect the level of vacuum and must be set to Closed to
prevent atmosphere from entering the chamber through the 3/8-inch Vacuum Port.
Vacuum and Gas Backfill Connections
KF-25 Vacuum Port
Vacuum Line Connected
to the 3/8 inch Vacuum
Port
1. Vacuum Supply : Connect
to the 3/8 inch (9.52 mm)
Vacuum Port.
Optional: Connect a
clean gas supply to the
Vent Port (Backfill Inlet).
The maximum allowed
gas pressure is 15 psi.