– Press stationary seal rings of the mechanical seals
and O-rings out of the mechanical seal housing (214)
and mechanical seal cover (215). See to uniform
pressure distribution.
– Remove locking pin (220).
– In case of a model with shaft wear sleeve, withdraw
shaft wear sleeve (206) and O-ring (115) from the
drive shaft (118).
7.2.2
Mounting the eccentric screw pump
General
Mounting of the individual pump components is effect-
ed after careful cleaning analogously in reverse order.
7.2.2.1 Mounting the shaft seal with the drive shaft and/or
hollow shaft dismounted
– For design with shaft wear sleeve, pull O-ring (115)
onto drive shaft (118).
– Push shaft wear sleeve (206) with the inside bevel
pointing to the drive shaft head onto the drive shaft
(118).
x
Mounting the stuffing box
– Push shaft sealing housing (204) onto the shaft wear
sleeve (206) and/or onto the drive shaft (118) or hol-
low shaft (125).
– In case of models P02, P12 including flushing ring
(208) and in case of models P03, P13 and P04, P14
including lantern ring (209), install stuffing box
packing (207) in the shaft sealing housing (204).
Please also refer to Section 7.1.2.3 – Mounting new
packing rings.
x
Mounting the mechanical seal, general
Mechanical seals are high-quality precision parts. The
mounting instructions of the mechanical seal manufac-
turers are to be observed. Careful handling and extreme
cleanliness during mounting are a condition of proper
functioning. To facilitate mounting, surfaces on which
O-rings are sliding, may be lubricated with lubricants
such as silicon oil, Polydiol or soft soap.
B
Do not use ordinary oil.
Note:
See to it that the parts sliding on
each other are only exchanged in pairs. When using
double PTFE-coated O-rings, see to it that the joint of
the outer coating points against the mounting direction
as otherwise, opening and/or withdrawal of the coating
may be effected (please refer to Figure 5 below).
Figure 5: Joint of the outer coating points against the
mounting direction.
x
Mounting the mechanical seal, single-acting
– Drive locking pin (220) into the mechanical seal
housing (214).
Series SLTP, SETP, SNTP, SLTBP, SETBP, SNTBP
ALLWEILER
a
10
x
Dismounting the stuffing box
– Remove self-locking nut (202), T-head bolt (201) and
gland (203).
– Pull shaft sealing housing (204) from the drive shaft
(118).
– Remove stuffing box packing (207) in case of models
P02, P12 including flushing ring (208), and in case of
models P03, P13 and P04, P14, including lantern ring
(209) from the shaft sealing housing (204).
– In case of a model with shaft wear sleeve, pull shaft
wear sleeve (206) and O-ring (115) from the drive
shaft (118).
x
Dismounting the mechanical seal, single-acting
– Withdraw mechanical seal housing (214) with atmos-
phere-side stationary seal ring of the mechanical
seal (219) from the drive shaft.
Note:
Particularly see to it that the casing with sta-
tionary seal ring of the mechanical seal is withdrawn
concentrically and not canted to avoid damages to
the stationary seal ring.
– Press stationary seal ring of the mechanical seal and
O-ring out of the mechanical seal housing (214). See
to uniform pressure distribution.
– Drive out locking pin (220).
– Undo grub screws, if provided, in the rotating part of
the mechanical seal (219), and withdraw mechanical
seal from the drive shaft (118).
B
Before undoing the grub screws,
mark or measure the position of the
mechanical seal on the shaft wear sleeve or drive
shaft. Do not push O-rings over the pressure marks
caused by the screws!
– In case of a model with shaft wear sleeve, withdraw
shaft wear sleeve (206) and O-ring (115) from the
drive shaft (118).
– Remove centering ring (217) with O-ring (218).
x
Dismounting the mechanical seal, single-acting
with throttled sealing water outlet
– Dismounting as for mechanical seal, single-acting.
– Remove mechanical seal cover (215) with O-ring
(218).
x
Dismounting the mechanical seal, double-acting
– Withdraw mechanical seal housing (214) with atmos-
phere-side stationary seal ring of the mechanical
seal (219) from the drive shaft.
Note:
Particularly see to it that the casing with sta-
tionary seal ring of the mechanical seal is withdrawn
concentrically and not canted to avoid damages to
the stationary seal ring.
– Remove O-ring (218).
– Undo grub screws in the rotating part of the mecha-
nical seal (219) and pull off mechanical seal from the
drive shaft (118).
B
Before undoing the grub screws,
mark or measure the position of the
mechanical seal on the shaft wear sleeve or drive
shaft. Do not push O-rings over the pressure marks
caused by the screws!
– Pull off mechanical seal cover (215) and clamping
ring (216) with product-side stationary seal ring of
the mechanical seal (219) from the drive shaft (118).
Note:
Particularly see to it that the mechanical seal
cover with stationary seal ring of the mechanical seal
is withdrawn concentrically and not canted to avoid
damages to the stationary seal ring.
