Hi

I have a water pump which (AFAIK) cannot have it's output varied
electrically, but I need to be able to make fine adjustments to the
flow rate of water output from it.

I was wondering, could I use a valve, or two to achieve this with a
flow and return type setup?

Something like this?
Output (higher-up than return)
/\
------ | ? optional valve here?
SRC---pump in|PUMP|out----|
| ------ |
/\ X (valve)
| |
|-------------/---------- (return flow)
\

Cheers,
Mark

I have a water pump which (AFAIK) cannot have it's output varied
electrically, but I need to be able to make fine adjustments to the
flow rate of water output from it.

It depends on the type of pump. However, most pumps would be quite happy
having a simple valve/tap on the outlet line that can vary the flow rate.
Shower pumps work in this fashion.

Christian.

I bought the pump reconditioned, but I've just found out a little bit
more about it. It's food grade, so I assume it's a magnetic drive?

Interestingly, the pump has a 'bypass' at the front which may be usable
for this?

Cheers,
Mark

I bought the pump reconditioned, but I've just found out a little bit
more about it. It's food grade, so I assume it's a magnetic drive?

I'm afraid this is beyond my experience. Perhaps the manufacturer has a
website with technical details?

Christian.

MarkMc wrote:
Hi

I have a water pump which (AFAIK) cannot have it's output varied
electrically, but I need to be able to make fine adjustments to the
flow rate of water output from it.

I was wondering, could I use a valve, or two to achieve this with a
flow and return type setup?

The output can be varied electrically, you need a variable frequency
drive, which costs 50-100 quid on ebay.
A bypass valve will work just fine though.

Thanks


I found out a little bit more about the pump. It's self priming, food
grade (magnetic drive?), and has a bypass at the front. I'm assuming I
can use this with a valve and return pipe?

Cheers,
Mark

Oops, looks like my first post did eventually make it. Thanks for the
help, I'll go for the bypass valve route.

Cheers,
Mark