Plan 32 uses external flush into the seal chamber (stuffing box) does your impeller have hydraulic balance ports from the inlet eye to the rear of the impeller? If so the stuffing box sees a slightly higher pressure than the pump inlet pressure. A good rule of thumb is 25psig above stuffing box...
Google GPM Eliminator Pumps. They are very good at slurry or hard scale applications. Repairs and repair parts are very reasonable since the pumps are made in the US. Not sure where you are located, but the Toyo pumps are made in Japan, with parts having to go through Vancouver Canada before...
A good baseline Vibration of pump and motor head upon installation coupled with dead head pressure matched to the manufacurers pump curve is a starting point. Monotoring these over time will give you degradation of the pumps performance. Impeller balancing is crucal in the repair of vertical...
Ruhrpumpen purchased part of the Flowserve family of pumps particualrly many of the Byron Jackson API Pumps. The Centerline supported pumps are very reliable when applied properly. The problem I have with Ruhrpumpen is the lead time for parts and new pumps. Because of the restructuring of the...
I don't think your customer is telling you the whole truth or all of the story. Closing the discharge valve will not cause problems since the bypass back to the DA will handle the minimum continuous flow conditions for the pump. but by closing the suction valve this would cause the suction...
In Flowserve WDE, WDX and others there is either a single balance ring /drum assembly or a stepped ring drum assembly. As JJ said you simply apply reverse hydraulic force opposing that being created by each impeller stage. The balance line return to either the suction side or to the point of...
You didn't say just what type of pumps you are shutting off. Split case double suction impeller or Ansi style end suction. Either way you may have a problem due to turbulence. I did a start up checks on 26 pumps that the engineer allowed the inlet isolation B/F valves to be placed within 4...
PowerPlantGuy
By all means keep the Flowserve Repair Center accountable for their repair. If they need to do it over again on their nickle then so be it. The old saying goes, "You never have time enought to do it right the first time, but you always have time to do it over." Just be sure that...
JRLAKE
My frustration level increases when customers want the best repair for the cheapest price. Customers may get cheap repairs in dollars but end up paying the price down the road. Replicators and pump chop shops are all around and will do very inexpensive repairs, but over the long...
SJPEARSON
Take a look at thread407-173199 the use of Vespel in pump repairs. This material is used in Flowserve repairs through the Flowserve Mechanical Seal Division. Your local or Regional Flowserve Repair Center will be familiar with it. It can be pricey, but the benefits of using the...
SJPEARSON,
Like JRLAKE stated, "who did the repair?" Was it a Flowserve Repair and Service Center? Or some repair company that said, sure I can do that. Was a root casuse and failure analysis done during disassembly? Many wear paterns internally can give indications of probable cause of...
sjpearson,
Read this information on Vespel. It will tell you all about the properties associated with this product.
http://www2.dupont.com/Vespel/en_US/Literature/233630a.pdf
Flowserve Seal Division offers this type of material for Impeller rings, inner stage seal rings and sleeves under their trade name AR/WT offered by Greentweed . It is quite pricey but well worth the money. Clearances can be set to normal allowable clearances. Normally on these types of pumps a...
