No-leak pump types.
No-leak pump types.
(OP)
Hi,
I have a system that I want to move fluid into and out at exactly the same rate. In the middle of the system is a reservoir that will be subjected to a maintained high vacuum. Even when the system is not operating, I would like this vacuum maintained indefinitely, consequently I'm left with a very limited choice of pump types. Actually so far the only type I've come up with is a peristaltic, but the flexible and pulsing nature of that type presents other challenges within my system. So I'm here soliciting ideas for other pump types that might work more effectively. Thanks for any suggestions!
I have a system that I want to move fluid into and out at exactly the same rate. In the middle of the system is a reservoir that will be subjected to a maintained high vacuum. Even when the system is not operating, I would like this vacuum maintained indefinitely, consequently I'm left with a very limited choice of pump types. Actually so far the only type I've come up with is a peristaltic, but the flexible and pulsing nature of that type presents other challenges within my system. So I'm here soliciting ideas for other pump types that might work more effectively. Thanks for any suggestions!





RE: No-leak pump types.
A magnetically driven pump of any design will also have a high seal integrity to the exterior, but none of those are positive displacement type pumps- they cannot be used for metering. The best you can get would be a gear pump, which really generates a lot of little pulses and isn't really PD- it is best described as semi- PD. Don't use gear pumps with non-lubricious fluids, especially if they are corrosive or you are operating at high temperature or low flows.
RE: No-leak pump types.
I agree that a diaphragm pump will probably be your best choice. An air-operated double diaphragm (AODD) is one possibility.
RE: No-leak pump types.
CP: I suspected I might need level controls though I was hoping to avoid it. I share the concern with Peristaltic collapse, though I don't think the pressure will be a problem. I checked into AODD's, but it looks like we'd have the same issue with check valves- thanks so much!
RE: No-leak pump types.