17. Setting of the rotating seal holding bush in case of rotor
replacement
Example of PL 100 Premium rotor
Pump casing depth
— 1 - Pump casing
— 2 - Casing protection plate
— A - Pump casing depth
A = 55 mm (2,2 inch)
Length of stainless steel rotor
— 1 - Rotor
— 2 - Edge at rotor
— B - Rotor length
B = 54.5 mm (2.15 inch)
Calculation of undersize
Undersize (U) = pump casing depth - length of stainless steel rotor = 0.5 mm (0.2 inch)
Half undersize (U/2) = undersize (U) : 2 =0.25 mm (0.1 inch)
NOTE!
As a result, the rotating seal holding bush must be
unscrewed by half the undersize (U/2) = 0.25 mm (0.1
inch)!
Old
Rotor, rubber-coated
New
Rotor steel / stainless steel
— with edge
Setting
— No resetting of the rotating seal holding bush required
— (Rotating seal holding bush flush with casing protection plate)
Maintenance and Repairs
BA-Classic FL_en-US, 03.05.2018www.boerger.de / www.boerger.com154
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