What Regulates the Glycol Pressure in My Chiller?

Hey, everybody. I’m John McCoy, Production Manager here at G&D Chillers. I’m going to run through what it takes to regulate the glycol pressure inside your system. There’s two ways to do that based off of our chillers.

One is a bypass valve located here. The way this works, there’s a spring that creates tension with this handle or loosens tension which directly affects the pressure inside the system. It’s normal to hear a little bit of chatter on initial start up when using this valve. Once it gets up to speed and the rotation is verified on your pump, you’ll hear that chatter quiet down. So it’s not a big deal, it’s perfectly normal.

The other way to regulate pressure inside the system is with a BFD here. Coupled with a transducer, this will maintain a constant PSI in your system by speeding up or slowing down the motor. Before you start adjusting the pressure in the system, which we factory-set with every chiller at twenty PSI, you want to make sure you verify the jacket pressure ratings with the vessel manufacturer you went with.

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