23
Operation and Maintenance Manual
QTS Series Twin Screw Positive Displacement Pump
QTS-M04
14. With the subassembly ready,
insert the rotary holder on the shaft
and push smoothly until it reaches
the static face placed previously
on the back cover. Repeat this
procedure to install the other single
mechanical seal on the next shaft.
15. At this point you have already
assembled the single mechanical
seals, continue with the assembly of
the rotor
Uninstalling the Double Mechanical Seals
1. Remove with the hand the stainless steel rotary holder subassembly (
12B-F
) by grabbing and
pulling out from the rotating face (
12F
). When pulling, the static face (
12G
) might come together.
2. To inspect the O-rings inside, remove the rotating face pulling gently out the rotary holder; inside
are the springs (
12C
) and the O-ring (
12D
), be careful because the springs are free. Finally remove
the O-ring (
12E
) which is on the rotary holder groove.
3. Remove the O-ring (
12A
) housed in the rotary holder on the front groove. Sometimes O-rings
can be loose out of their grooves and get stuck to other components.
4. On the back cover (
5
) side pull out the static face (
12G
) and the O-ring (
12H
). Avoid any harsh
contact on the sealing faces.
5. To remove the seal housing (
12L
), O-rings (
12K
and
12N
), springs (
12M
) and the static face of
secondary seal (
12P
) it is necessary to remove the back cover of the pump.
M
A
INTE
N
A
N
C
E
12P
28
12A
6
12Q-T
25
12H
12G
12B-F
12P
28
12A
6
12Q-T
25
12H
12G
12B-F