34
OPERATION AND MAINTENANCE MANUAL
QTS SERIES
Twin Screw Positive Displacement Pump
QTS-M
08
QTS-M
08
MAI
N
T
E
N
AN
C
E
19.
Take the rotating face
(12F)
and insert it into the O-ring; the holder pins must fit the notches
on the rotating face. Push with your hand against the holder until the springs are compressed
and the rotating component stay inside the holder.
NOTE: It is important that the notches on the rotating face fit the holder pins; the physical contact
is determinate by the O-ring and the springs with no contact between metal and the rotating
face. This step is crucial for the right assembly of the mechanical seal; failure to do so properly
can cause damage to the mechanical seals and the rotors.
20.
Place the O-ring
(12A)
into the holder front groove to finish the rotary holder subassembly.
21.
With the subassembly ready, insert the rotary holder on the shaft and push smoothly until
reach the static face placed previously on the back cover. Repeat this procedure to install the
other primary mechanical seal on the next shaft.
ATTENTION: Remember that every double mechanical seal requires lubrication without
exception. Place the flush nipples
(53)
, one on each side of the back cover, the bottom works as
the inlet and the top as the outlet of the lubricant fluid for each seal.
54
53
22.
At this point you have already assembled the double mechanical seals, now continue with
the assembly of the rotors.
