I Recently worked on a couple of I/R B.F.P.'s with these superbolt nuts holding the discharge head on. Thier made up of 24 3/4-16 hardened jack bolts that you torque up to 360 ft/lbs to strech the main stud. These pumps had 12 studs each so you get to torq. 288 3/4" bolts till all are stretched even. We had to cut and or beat 6 or 7 to get them off main studs for some reason. It was a very time consuming process to use these over a heated stud growth or hytorq. nut method. We also used an air powered hy-torq torqe gun to twist the jakbolts off/on as needed, its a pretty slick gun too. They claim ease of use with only small handtools needed for these but I'll take the old calrod have a cigerett and wait stretch with castelated nuts anyday. Just wondered if anyone else has run into these superbolts and were
OK I'll plead ignorance here. What is a I/R B.F.P. ?
johnny o , the reason for these is you can apply huge torque by using small tools if you were to use a hi torque on a huge nut you end up galling theads and smearing surfaces. used them lots the are a good solution to high torque problems but can be a pain because of the many bolts.
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New on me too...Superbolt
This on a compressor? Likely not too many companies around anymore that let you smoke while working, I hear rules are coming out against whistling too.......LOL
My limited experience, one job, they were a PITA. Of course this was on smaller sized bolts, 2 1/2's. I would have much preferred regular nuts and a hydraulic wrench, much much faster.
Id take a guess and say
Originally Posted by Willy
Ingersol Rand Boiler Feed Pump.
Sure looks like a feed pump to me but I'm only guessing on the name.
Forgot to add, that looks like a B------d of a job. Glad I'm not on the tools doing this sort of work anymore. I think there would be less effort in the old "heating element up the centre of the stud" method.
I suppose the "super bolt" type shown here would mean a lower capitol investment in maint tooling for the plant owner, but in the grand scheme of things the cost of the heating elements and power supply would be minimal compared to the total project cost.