What’s the most effective solution to prevent lift-station pumps from clogging?
asked 16 June 2016 asked by Tom01 (810 points)
Hello, I had a site where operators had to intervene on a regular basis (3 to 4 times per month) to unblock the pump. They had been using a Xylem N-impeller, and we replaced with a TSURUMI pump. This is a "cutter" pump. Since then, nearly two years ago, there has been no need to unblock the pump at all. Cordially,
Thank you for the feedback, Pascal. It seems to me that many different manufacturers make a similar pump, why did you go with Tsurumi? If there is a particular reason, I'd be very interested to know because I have seen mixed reviews for grinders (wear and tear of blades, blockage by fibrous material, to name a few.) We have no relationship with the company, but if their grinders are better, we'd like to try them out. Thanks for getting back to me.
Hello Tom, The pump I am referring to actually isn’t a grinder; it’s a high-head cutter pump. It's in a higher performance category. I have tested some of the grinder types, in particular the Xylem N-impeller. It works well in some regards, but has its drawbacks. If your problem is frequent blockage, I really recommend the Tsurumi pumps. My feedback: - price of the unit is similar to grinder systems - virtually identical power - much lower operating cost because there really are no blockages to take care of. Sincerely,
Do you have to unblock the pumps, or the inlet sewer to the station? Sounds like your basket screen is working and trapping the junk that is getting to the station. Unless there is an opportunity for an automatic screen upstream, I would say you may already have one of the lowest cost options for trying to protect the pump from the solids. If you find the basket openings too large, then you could look at putting a finer mesh inside in hopes of trapping more solids. Frequency of clean out would need to be increased, but hopefully it wouldn't fully block the station.