Page 29 - Occupational Health & Safety, May 2018

integrally within the system’s chiller unit.
The brain of a warming system is its thermostatic mixing valve. This device ensures that the safety equipment safely receives water at the required tempera- ture. A good thermostatic mixing valve is actually a system of valves, typically de- signed by safety equipment manufactur- ers since they understand their equipment and their specific flow rate requirements. Specifiers are cautioned to do their home- work well with respect to selection of the proper valves for your specific needs.
4. Determine your hot and/or cold water source. In sizing the tempered water system for any particular application, pro- viding a source for sufficient quantities of water is essential. Recent advancements in instantaneous hot water heaters have made these products practical for use in emer- gency equipment applications, especially where space for traditional hot water heat- ers and hot water storage tanks is limited.
5. Consider the maximum simulta- neous usage. Always work to the maxi- mum use, worst-case volumes. Booster and/or re-circulation pumps, as well as storage tanks, may be necessary to ensure the availability of the maximum demand volume of tempered water. A variety of products are available to fill these needs.
The science of emergency equipment design and specification continues to ad- vance rapidly, and the clear winners are the specifiers who stay “on top” of the advance- ments and the employees who are pro- tected by them. Establishing and maintain- ing a best practice comfort zone for water temperature delivery provides everyone the maximum peace of mind.
Samantha Hoch is a Product Marketing Specialist at Haws®.
www.ohsonline.com
Circle 2 on card.