Watson-Marlow MR-Series - Manual (Page 14)

Revision 1.4 / August 2013 Visit our website at www.masosine.com 14
Seal System - Disassembly and Assembly
A. Lip Seal
Reference the isometric drawing in
Figure 4 for parts identification while following the lip seal
disassembly and assembly steps.
Figure 4 – Lip Seal Disassembly / Assembly
Lip Seal Disassembly
1. Using a punch and hammer, remove the single lip seal, item 510, located in the rear of the lip seal
housing, item 506. NOTE: Be careful not to damage the inner diameter of the housing when
removing the seal.
2. Turn the seal housing upside down and press the remaining two lip seals, item 510, and the two
support rings, item 520, out of the seal housing using the press plug diameter for your specific
model listed in
3. . The lip seals should be discarded.
Table 1 – Lip Seal, Press (OUT) Plug Diameters
MR-120 = 1-3/8" or 34.9 mm
MR-125 = 1-7/8” or 47.6 mm
MR-130 = 2-3/8” or 60.3 mm
MR-135 = 2-3/4” or 69.8 mm
MR-150 = 3-1/2” or 88,9 mm
NOTE: Be careful not to damage the support rings, as these will be used again.
Lip Seal Assembly
1. Apply a food grade lubricant to the inner diameter of the lip seal housing, item 506. This should be
done to both ends of the housing.
506