Operation Manual
11 Replacing Mechanical Seal
11.1 Single mechanical seal
The seal comprises of a rotary face with
associated 'O' ring which is located in the rotor
with two pins providing the drive. A wave spring
provides a closing force through the static face.
Two pins provide anti-rotation fixing for one
static face with associated static 'O' ring.
ITEM
DESCRIPTION
42
43
45
64
65
66
76
77
82
83
85
Shaft Sleeve
‘O’Ring Sleeve/Rotor
‘O’Ring Shaft/Sleeve
Clip Shaft Sleeve Retention
‘O’Ring Seal Housing/Rotorcase
Seal Housing
'O' Ring Mech Seal/Rotor
'O
’Ring Mech Seal/Housing
Seal Face Static
Seal Face Rotary
Wave Spring
11.2 Single mechanical seal removal
1.
Remove the gland guards (21).
2
Thoroughly clean the inside and outside
of the seal area on the rotorcase and the
bores of the rotor. The static element of
the seal and the seal housing (66) should
be removed as an assembly.
3.
Use a suitably sized screwdriver to lever
between the seal housing and shaft
sleeve (42). This will ease the seal
assembly out of the rotorcase.
4. With the static seal assembly on a suitable
work bench use a screwdriver or lever in
the wave spring recess to prise the static
seal face (82) out of the seal housing.
The wave spring (85) can be pressed
over the drive pins and removed.
5. Use a screwdriver/lever to prise the rotary
seal (83) face out of the rotor.
STP125 Page 24
