Figure 2: Ethylene Glycol and Propylene Glycol Curves

Pe rce nt Glyc ol Cu rves for Free ze P rotec tion

40.0

 

 

 

 

 

 

30.0

 

 

 

 

 

 

20.0

 

 

 

Eth ylene G lycol

 

 

 

 

Prop ylene

Glycol

 

 

 

 

 

 

10.0

 

 

 

 

 

 

0.0

 

 

 

 

 

 

-10.0

 

 

 

 

 

 

-20.0

 

 

 

 

 

 

-30.0

 

 

 

 

 

 

-40.0

 

 

 

 

 

 

-50.0

 

 

 

 

 

 

-60.0

 

 

 

 

 

 

0.0

10.0

20.0

30.0

40.0

50.0

60.0

% Gl ycol by Vol um e

Example: 45°F set point minus 20°F = 25°F.

From Figure 28, 25°F equates to 10% by volume of glycol required.

GP Series Portable Chillers

Chapter 3: Installation

18 of 44

Page 18
Image 18
Sterling GP Series specifications Ethylene Glycol and Propylene Glycol Curves