I would lean toward the clamp-on ampmeter readings being correct especially when two different ones were used. The motors of this size that we use have a FLA of 222 which is within the range you have stated. Some things that work on paper just don't work out that way in the real world...
I need some direction from some of you experts. I'm currently trying to start a new hydraulic system-piping is all carbon steel-contractors installed the piping, it was hydro-tested, chemically flushed, pickled, supposedly neutralized and then contractors went to an oil flush and had to meet a...
Rexroth acknowledges a drift with changes in both pressure and fluid temp although not to the extent that you have seen. I've used that valve before but have had better results from Moog. If the drift is causing a positioning problem you can always sandwich a "blocking valve" under the prop...
Slip also will vary with RPM and vary greatly with different manufacturers. Gear pumps used for hydraulic systems are generally rated in the 80-85% eff. range @ a specified RPM and fluid @ a certain viscosity however Voith touts a gear pump at 95% eff. under similar conditions.
micalbrch,
Thanks for your reply, looking for pipe table for seamless metric pipe, regarding working pressure, burst pressure and safety factors for different sizes and wall thickness.
Tom
Can someone direct me to a website that has a metric pipe chart with wall thickness, working pressure and burst pressure ratings. Didn't come up with much when I searched on the "net".
Thanks,
Tom
Don't have any idea where you are located but if you are in the farm belt you might try a tractor/combine/cotton picker salvage yard. Most all the modern day combines and cotton pickers are hydrostatic drive and you can probably pick up a complete hydrostatic drive relatively cheap. Not doing...
amar,
The more info you provide the better answers you will receive, i.e., schmatic, type/model of pump etc.
Hydraulic power that is not used for work is converted to HEAT and there are plenty of systems with the inefficiencies designed out and run within an acceptable viscosity range without a...
Not sure what a "10% turndown" is-if you are refering to varying flow then there are several companies/product lines that fit the bill with control that varies from manual to electric/proportional control of the swashplate.
Check with Eaton, Rexroth, Oilgear. Hope this answers your question...
Rectifying AC for a DC coil is not uncommon, other manufacturers do this although this is the first 196 DC I have heard about. More common is 96 VDC. If you could post a schematic you might get some more input. Its been my experience that you would have shaft seals for the pump and the pumps...
Rod,
For whatever reason I could not get your attachment to open yesterday at work. The SS hose you show is the same type we use for water evacuation on electric arc furnaces and ladle furnace applications(vacuum). They are bad about cracking and sucking air-when this happens we lose...
