Well we were thinking this was going to be the only way to get close to the low flow 0.6 gpm condition and avoid wasting too much energy recirculating water. Yes the head would drop but for instance in the CR5-3 it looked like we would still get enough pressure when we drop the speed to it's...
Thank you, yes that does seem correct. I think I ignored that because that line will not work for us for other reasons. They seem to have TP versions with a fixed speed motor but they do not have a 32-330 in the TPE line that has the variable speed motor. And more importantly it only seems to...
Thank you but I believe i confused you with the units. those look to me like they are good matches for 20m head and 30 or so m^3/h. The graphs have flow measured in m^3/h in this case. However our requirements are 30 gpm and 30 gpm is about 7 m^3/h.
Yeah, it's possible I'm misunderstanding something. Our requirements are to provide between 1 and 5 bar at 0.6gpm and to provide approximately 2 bar at 30gpm. To be honest I do not know if that includes the system inlet pressure or what the pressure might be? it's fed by a tank that is not...
We were looking at Grundfos only. I guess we can look at Goulds. We selected the CR5-3 which is a 3 stage pump. We looked at their single stage TP models and found that to get get 2 bar you had to go really far to the left on the curves. Like we have to get something that has a nominal flow...
No that's exactly what I want. The valve should be open the entire time it's not under high pressure. Closed tightly when the pressure is high. Tightly enough to prevent the build up of pressure on the other side for 3 minutes or so. Then wide open during low pressure.
No I want it to open at the end of the high pressure step.
Yes, we can absolutely use an actuated valve. As I posted above I understand that that is the default method we will fall back on. But my question is why not use a regulator backwards as long as it's rated to 83 bar. Or if not...
As I understand it though those backpressure regulators open the valve when the pressure rises right? We want the opposite. I want it to close the valve when the pressure rises. So it would in practice operate like a regular regulator except plumbed backwards.
Yes, we could definitely use...
The
The fluid is water.
We are doing a filtration process. We pressurize the water to push it through a filter. We have a recirculation system that is constantly running the high pressure water over the filter and not just through the filter. Once the water has been squeezed out the...
Hi, we have a system that cycles from high pressure (~80 bar) to low pressure (~1 - 2 bar). We want an automatic air release valve. We are finding that they don't make such things that can handle 80 bar of pressure. So we're trying to figure out a solution to this. In my head I am imagining...
Yes, this helps greatly. I think we settled on a multistage pump because the pressure / head curve seemed correct. We needed 30gpm through a system with about 2 bar of back pressure. This seemed to be too high a pressure for the single stage pumps we looked at. Does this make sense to you or...
Hi, I was recently hired for something I'm not even remotely qualified for. I have to help figure out a solution to a pumping issue.
What we want to do is see if we can use one pump as a booster to a slow high pressure pump feeding a high pressure system. Then we want to use the same pump to...
