Watson-Marlow MR-Series - Manual (Page 28)

Revision 1.4 / August 2013 Visit our website at www.masosine.com 28
Troubleshooting the MasoSine Pump
Problem Possible Causes Remedy
Inadequate Flow
1. Incorrect shaft rotation
2. Scrapergate installation
3. Air leaks – external, internal
(loose fittings, lip seals)
1. (A) Check rotation
(B) Change wiring
2. Change Scrapergate & Guide
3. (A) Tighten fittings , i.e. Tri Clamp
(B) Replace worn lip seals or
o-rings
Loss of Performance
1. Worn Scrapergate
2. Scrapergate support of seal
housing worn where
scrapergate shuttles
3. Worn Liners
1. Check for wear & replace
2. Rotate to get a clean spot
3. Replace if worn
Leaks
1. O-rings (pinched, cut, missing)
2. Lip seals or seal housing
damages
3. Grooves in shaft sleeve from
abrasive applications or high
discharge pressure
1. Visual inspection – replace
2. Rebuilt or replace assembly
3A.Check system for discharge
pressure problems
3B.Consider hard coating shaftsleeve
Accelerated Wear
1. Speed or abrasion
2. Excessive discharge pressure
(>150 PSIG)
3. Dry Run
1. (A) Decrease pump speed
(B) Use larger pump
2. (A) Increase line size
(B) Check valves
(C) Check viscosity & line losses
3. (A) Recommend level control
(B) Change internals