When anti-rotation devices fail at an "alarming rate" it would indicate that the pumps are being forced to run backwards by the flow through the system. Without knowing operating details of the system I'm afraid I can't help. However, I would suggest you investigate the reasons and conditions under which the system would be reversing.
Topic: Re: Why are we experiencing anti-rotating device failures at an alarming rate?7 February 2012
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Charles Bensen Community Member 1 Post
Re: Why are we experiencing anti-rotating device failures at an alarming rate?22 January 2013 at 12:45pm Last edited: 5 February 2013 at 2:32pmI am looking for feedback if a root cause was identified for the anti-rotation device failure posted in February 2012? We experienced a recent failure of a new device installed on a circ water pump without a check valve (no room for check). We installed the anti-rotation device because our 4 pumps are now connected to a common header and if a pump trips it takes 2 minutes for the discharge MOV to close. Pipe diameter is 9ft. We verified expect reverse torque and device design calculations are ok. Material composite analysis showed no anomalies. Currently we have the failed components at a lab for fracture analysis. Device is pin design. Any feedback would be helpful. Also, do you know of a vendor that offers retro-fit anti-rotation hardware?
Ross Mackay Forum Moderator 95 Posts
Re: Why are we experiencing anti-rotating device failures at an alarming rate?23 January 2013 at 4:34pm Last edited: 5 February 2013 at 2:32pm
Unfortunately, this is a situation that would require an in-depth study of the situation, which we obviously can't do in this forum.