Antifreeze: Does your process chiller need antifreeze?  Probably. 

Dow antifreeze - click here...Pricing & Availability 856-235-2120

** Antifreeze is primarily used in a closed chilled water loop of a cooling system. Few tower systems use antifreeze and only if the tower loop is 100% closed (No evaporation - ambient cooling only).

Specific reasons for use:

* If your chiller is located outside and is air cooled, as opposed to tower water cooled, you will probably need some type of antifreeze. If unsure as to how cold it gets in your geographic region, look in a Farmers Almanac. If you have your air cooled chiller has ductwork that connects to an outside wall, again you may need antifreeze. Even though your chiller is located inside and in a heated area, the ductwork can channel the very cold air to the inside components of your chiller.


* If your chilled water supply temperature (coldest water exiting the chiller) is below 50 F; you more than likely will need antifreeze The reason for this is that, even though the water is only 49F, the actual refrigerant tubes temperature coming in contact with the water is very near or below freezing. 50 F is only a guide and "your" water quality and system design efficiency will determine the "Not to go below" safe temperature point. Some chillers may go as low as 47F, while others, usually old with poor efficiency, need to be set as high as 60 F to keep from freezing.


* If your chilled water comes in direct contact with your product, (example: Extrusion or bath cooling), you can not use any type of antifreeze. Usually with this type of situation there is an extra water to antifreeze/water heat exchanger installed to combat this problem of direct contact.


* If you have daily or weekly closed loop system water losses, I would recommend that a pre-mixed solution be made and stored in a 55 gallon or 5 gallon containers. This way if the system tank becomes low, the pre-mix is added assuring the proper freezepoint solution. I also recommend that 5 gallon buckets be placed at any water filter check area. This will reduce your spills and keep the antifreeze that you have in you system not down the drain.


* If your product is of pharmaceutical or food applications, the antifreeze used must be a clear propylene glycol. Antifreeze solutions with dyes or special inhibitors are considered "toxic" and can not be used in these situations.

Home page

Chiller Warranty Service- Click here for details

The first hands on Chiller/HVAC/R troubleshooting handbook is out in publication. This is a must have book for you and your service technicians.  It will save you time and money along with passing on the vast knowledge of 60 years experience.

Click here for details

Click here for E-mail requests

 

This page was last updated on January 15, 2015

Click on any of the following hyper linked topics - especially if your browser does not support the java navigation bar above.

Chiller technical support for, plastics chillers, printing chillers, oem chillersMRI chillers, laser chillers, air dryers,, hvac chillers 

Chiller sales for,, chiller rental, used process chillers 2-20 ton, used process chillers 25-80 ton, used chillers 90-350 ton, rental chiller 8-80 ton, rental chiler 100-400 tons

About John C Schaub Inc,, chiller service, rates and hours, geographic chiller service regions, customer references

What is a chiller, chiller refrigeration cycle, chiller tonnage equations, chiller tonnage design parameters, size a chiller, chiller sizing

Chiller antifreeze info,, dowtherm, dowfrost, freezepoint mixture, chiller phone supportchiller water treatment, chiller water flow rates, emergency chiller service

 

This site was created and maintained by Jack Schaub

Any inquiries please E-mail the Webmaster:  chillerservice@comcast.net
John C. Schaub Inc. (On line-11/96)  23 Adams Street  Mt. laurel NJ. 08054 phone 856-235-2120
Copyright 1996-2015