3.
Carefully place the annular casing (0103.00) against the back plate (0161.00).
Thus, the impeller (0230.00) is pushed by the annular casing (0103.00) into
the zero gap position. The air gap then forms behind the impeller.
4.
Remove annular casing (0103.00) so that the impeller (0230.00) does not
move, retaining its position.
5.
Screw the impeller nut (0922.00) onto the shaft so that it just touches the
impeller without moving it.
6.
Determine gap a between the seal spacer (0557.00) and the impeller
(0230.00) using a feeler gauge.
→ The gap size has been determined. Permissible clearance: 0.7 mm – 1 mm
(27.6 - 39.4 Thou)
Sealing washers 0557.00 are available in various thickness dimensions - 0.25
mm (9.84 Thou) classification. If the permissible gap size cannot be achieved
with the seal spacer used, it must be replaced with another one.
Variant 2 - encapsulated (hygienic) mechanical seal
1.
Push the impeller (0230.00) onto the shaft (0211.00), making sure it does not
contact the shaft shoulder. It should be flush with the shaft thread at the front.
2.
Carefully place the annular casing (0103.00) against the back plate (0161.00).
Thus, the impeller (0230.00) is pushed by the annular casing (0103.00) into
the zero gap position. The air gap then forms behind the impeller.
3.
Remove annular casing (0103.00) so that the impeller (0230.00) does not
move, retaining its position.
4.
Screw the impeller nut (0922.00) onto the shaft so that it just touches the
impeller without moving it.
5.
Determine gap a’ between the shaft shoulder and the impeller (0230.00) using
a feeler gauge or the like.
→ The gap size has been determined. Permissible clearance: 4.7 mm - 5.5
mm (0.185" - 0.217").
The actual gap size is obtained by subtracting the 4 mm (0.157 ") shim integrated
in the encapsulated mechanical seal. If the measured distance a' is less than 4.7
mm (0.185 "), the backside of the impeller hub (b) must be unscrewed by this
difference.
Malfunctions / repairs
Repair
BA.H2A.KYY.001.GB_2
60
27.02.2018
