Waters Xevo TQD Overview And Maintenance Manual page 221

3. Attach the NW25 tee to the inlet of the pump using the NW25 center
ring, and then secure the connection with a clamp.
1-inch ID
vacuum hose
Clamps
Flange
NW25 tee
Pump inlet
4. Using the NW25 center rings and clamp, and the 7-mm nut driver,
attach the flanged end of a length of 1-inch ID vacuum hose to the top
port on the NW25 tee, and the 10-mm reducer fitting and a length of
10-mm ID nylon tubing to the middle (perpendicular) port on the tee.
5. Using 2 hose clamps, connect the opposite end of the length of 1-inch
vacuum hose in
instrument's rear panel.
6. Connect the opposite end of the 10-mm nylon tube to the 10-mm source
vent port on the instrument's rear panel.
To prevent serious damage to the instrument, two
Notice:
separate exhaust systems are required: one for nitrogen, the other
for the roughing pump. Vent the exhausts to atmosphere through
separate lines. Oil mist can seriously damage the instrument if the
nitrogen exhaust line connects with the roughing pump exhaust
line. Your warranty does not cover damage caused by routing
exhaust lines incorrectly.
7. Using 1 hose clamp, connect a length of 12.7-mm clear PVC exhaust
tubing to the roughing pump exhaust port NW25 nozzle fitting.
Use the sharp knife to cut the PVC exhaust tubing
Requirement:
squarely (that is, perpendicularly to its horizontal axis).
step 4 to the 1-inch OD straight vacuum port on the
March 14, 2014, 715004387 Rev. B
Connecting the oil-filled roughing pump
10-mm nylon tube
10-mm reducer
fitting
TP03414
221