29
OPERATION AND MAINTENANCE MANUAL
QTS SERIES
Twin Screw Positive Displacement Pump
QTS-M
08
13.
Place the O-ring
(12A)
into the holder front groove. This completes the subassembly of
the rotating part of the seal.
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
(12L)
and the static face of
12P
28
12A
6
12Q-T
25
12H
12G
12B-F
12P
28
12A
6
12Q-T
25
12H
12G
12B-F
MAI
N
T
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N
AN
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