The Engineer pointed the pump right at the

Bill Wolf

the boiler. 16 lb delta p across the pump, 30 lb relief on the boiler. Does anyone know of a reliable prv that can be set between 5 - 7 lbs? Taco and B&G are out according to their engineers. Bill

Mark Eatherton1

When you say PRV....

are you meaning pressure reducing valve, or pressure regulating valve, or pressure relief valve.

Thats the problem with alphabet soup. It tastes differently to different people. In your case, I'd advise setting the pump so it pumps away from the expansion tank AND the boiler if at all possible.

Tell us more.

ME

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Bill Wolf

Sorry. The Prv is the pressure reducing valve. The customer will not move the pumps - 3inch welded piping.

Mark Eatherton1

Can you

provide us with a simple one line schematic? It helps clarify things.

It sounds as if you need a pressure assisted bypass. Kinda like a pressure relief valve except that it doesn't let water out of the system like a pressure relief valve does.

Use MicroSoft Paint program to generate a drawing. Here's some symbols you can use if you want.

ME

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ScottMP

Hello Mark

How do you transfer your symbols to my paint program ??

Thanks for the help.

Scott

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HBW

PRV

Honeywell Braukman makes PRV's to bypass flow around from the discharge to the suction of the pump, usually used when single port zone valves close off.

Bill Wolf

Here's the schematic. Sorry for the primitive drawing. By the way Mark, what do you use to draw schematics like the one you sent me.

Bill Wolf

Here's the schematic.