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Post by ladder868 on May 2, 2008 9:15:55 GMT -5
I was wondering if anybody elses departments have been having to replace any valves on there pumps due to the "vacuum testing" in the updated NFPA 1911 for annul pump testing. I just had a 2 year old truck go and it had 4 valves replaced b/c it failed the vacuum test. And another one had 7 replaced. Anyone else having these problems?
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Post by xcapt51 on May 2, 2008 10:33:34 GMT -5
Who did your testing?
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Post by wqce207a on May 2, 2008 13:09:15 GMT -5
the pump tests are alot more stringent now for the draft portion. You might need to re-train the chauffeurs and remind them to drain the valves after every pump use. It's very important to do this during the winter. It takes a minute to walk around the rig and open all of em.
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Post by ladder868 on May 2, 2008 14:52:43 GMT -5
Trucks go to hendrickson and they are doing the vacuum test, and then they take it to nassau for the pump test.
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Post by bfd732 on May 2, 2008 19:07:15 GMT -5
Yes, we went through the same thing last year. We draft for practice often and were told that sediment, sand, etc.. can wear the valves enough over time to result in test failures.
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Post by chemical on May 2, 2008 19:14:15 GMT -5
Good strainers and drainers. Don't suction out basements and pools anymore. No drafting drills from a pond or saltwater without float docks way out with at least 3 ft. waterline to bed. The grit scores the polyproplene (sp?) balls and ways and yes it will fail the vacuum. Flow the pump on idle with all wide open even after hydrant operations and spray wd40 in the intakes before and after you shut down. Put new intake and discharge gaskets with liberal application of vaseline, bleed the pump and refill as you tighten everything down while flowing just before you go. This test must have been developed by the unions and pushed on the NFPA. It is costing big money here, I can just imagine the rural areas.
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