Operat ion and Maintenance Manual
QTS Series Twin Screw Positive Displacement Pump
M
A
IN
T
E
N
A
N
C
E
12P
12N
12M
12L
12K-O
13
10. Place the O-ring (
12N
) on the static face of
the secondary seal (
12P
) and insert it on the seal
housing (
12L
); match the notches with the pins.
Press evenly with both hands until the element is
completely inside the housing. If the pins are not
aligned with the notches the element can be
damaged; the final position is determined by the
spring and the O-ring so there should be no
contact between metal and the static face of the
secondary mechanical seal.
11. Continue placing the seal housings (with seal
faces and O-rings) inside the back cover (
5
).
12. Tighten the hexagonal socket head cap screws
(
13
) to secure the seal housing in the back cover.
13. Repeat this procedure with the next seal
housing.
12L
13
12H
12G
DRAG PIN
NOTCH
14. The face of the primary mechanical seal
(
12G
) has a notch to prevent rotation. Place O-
ring (
12H
) on this element and insert both in the
pump housing. Be sure the notch matches the
drag pin on the seal housing (
12L
) and push
gently until the element gets completely inside;
the final position is determined by the O-ring so
there should be no contact between metal and
the static face of the primary mechanical seal.
NOTCH
DRAG PIN
12L
12G
12H
Ampco Pumps Company QTS Manual M-030 Rev A 1.16
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