Fowllife Posted July 27, 2020 Share Posted July 27, 2020 Unfortunately your dealing with one of the problems of "re-purposing" equipment. You don't really know exactly what you have for some of the pieces of your system. There is also a chance that you control valve is not rated for the flow rate you are at now (unless you have already checked that) As I have mentioned earlier, there are websites and calculations to figure out every piece of you system. I strongly suggest you take a few hours to find those calculations and analyse every piece of your current system. With the current pump flow and pressure analyse all of your pipe sizes and flow rates of the whole system, and the return pressure. Make sure every piece will work for your flow rate and your pressure. Your system was originally a low volume system so there may be one fitting too small, or one port too small that is causing your issue. With all of the changes you have made nobody really knows exactly what you have but you. Quote Link to comment Share on other sites More sharing options...
JHCC Posted July 27, 2020 Author Share Posted July 27, 2020 Reasonable. Quote Link to comment Share on other sites More sharing options...
Glenn Posted July 27, 2020 Share Posted July 27, 2020 You may want to measure every diameter that the hydraulic fluid flows through. The smallest opening is your limiting factor. Think of it as a restrictor plate on a NASCAR engine. Quote Link to comment Share on other sites More sharing options...
JHCC Posted July 28, 2020 Author Share Posted July 28, 2020 I grabbed the old hose that used to go from the pump to the valve; its internal diameter is about 5/16". I suspect that the ID of some of the fittings I've put in place to connect the 3/8" solid tube may be smaller still; I will check those later. Quote Link to comment Share on other sites More sharing options...
JHCC Posted August 29, 2020 Author Share Posted August 29, 2020 Got some fittings and switched in the larger solid tube between the reservoir and the pump and between the pump and the valve. It definitely works a lot better than with the smaller tubes, and I'm getting about 0.82"/sec. I guess that means that it's still stuck in second stage, but it's not stalling out when it goes under load. I'll see how it does with hot steel. Quote Link to comment Share on other sites More sharing options...
Frosty Posted August 29, 2020 Share Posted August 29, 2020 Still stuck in 2nd. stage. Is that's the pump that came with it? I don't recall. Might be the reason it was surplussed or just some crud jamming a valve. Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
JHCC Posted August 29, 2020 Author Share Posted August 29, 2020 No, it’s the new pump. Quote Link to comment Share on other sites More sharing options...
Frosty Posted August 29, 2020 Share Posted August 29, 2020 Old control valve? Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
JHCC Posted August 29, 2020 Author Share Posted August 29, 2020 Yes. Quote Link to comment Share on other sites More sharing options...
Frosty Posted August 29, 2020 Share Posted August 29, 2020 The valve might have an obstruction restricting the flow to the point of tripping the relief valve in the pump. To isolate the problem would require testing the various size plumbing with a timed flow test. Fill a gallon jug or measure container through the various plumbing one at a time. Start with the main HP hose from the pump to the valve. Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
JHCC Posted November 2, 2020 Author Share Posted November 2, 2020 Long-overdue update: I finally got around to trying to forge with the new pump in place, without success. So, I’ve put the previous pump back in and resigned myself to working slower than I would like. On the other hand, working with a kiss block makes forging down to 1/2” round much easier. Quote Link to comment Share on other sites More sharing options...
Frosty Posted November 2, 2020 Share Posted November 2, 2020 No success. You're just going to leave it at that? I don't think so buddy, lets hear the details. What didn't it do and how so? Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
JHCC Posted November 2, 2020 Author Share Posted November 2, 2020 The new two-stage pump was still stuck in the second stage, and it would stall out when the dies hit hot steel. I’d hoped that it would still forge, but alas! Quote Link to comment Share on other sites More sharing options...
Frosty Posted November 2, 2020 Share Posted November 2, 2020 Is it a new pump or an industrial surplus acquisition? Stuck in 1st. is no good and I don't know about a 2 stage pump's innards. <sigh> Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
JHCC Posted November 2, 2020 Author Share Posted November 2, 2020 New new. Quote Link to comment Share on other sites More sharing options...
Frosty Posted November 2, 2020 Share Posted November 2, 2020 You have a new valve too don't you? I'm thinking it's a return it, rather than mess with it. I'd call and see if you missed something though. How complete is the manual? There isn't much to miss with a pump but I don't know 2 stage pumps well at all. This is a bummer. Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
JHCC Posted March 5, 2021 Author Share Posted March 5, 2021 NB: Some further discussion of the wiring of the outlet now has its own thread at Upgrading cable in a NEMA 6-50R outlet. Quote Link to comment Share on other sites More sharing options...
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