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Temperature Control for Glycol in Waste Water


Control products for unique industry challenges

Throughout our history, engineers have called on AMOT products to solve very specific challenges in a variety of different industrial applications. Continue reading below to learn how different industries use our control products in unique applications. Contact us if you’d like help specifying a product.

Protect Non-Condensing Gas Boilers from Corrosion and Thermal Shock

When designing a non-condensing boiler system, operational problems can occur if the return water temperature is not controlled. On one hand, if the water returned to the boiler drops below 140oF (60°C), condensation of the flue gas occurs. This, in turn, causes corrosion on the copper fins of the boiler. Conversely, if the temperature of the returned water is too hot, it can lead to thermal shock, a condition where a sudden change in temperature causes rapid and uneven expansion and contraction of the boiler’s structure. An AMOT 3-way thermostatic control valve is the simple, reliable answer to controlling return water temperatures and protecting a non-condensing boiler.  AMOT offers valves in low-lead bronze, bronze, cast iron, and other body materials to meet different heating system needs. 



Typical systems that require protection against condensation or thermal shock include, in-floor radiant heating, heat pumps, greenhouse heating, soil heating, manuafacturing operations, and hydronic heating.

Control Glycol Temperature in Waste Water Treatment Plants

Modern treatment plants require more precise temperature control of the water/glycol circuits used to cool their digesters.  Most digesters work optimally at a high temperate of 190°F plus.  The AMOT externally-actuated Model G rotary control valves help optimize performance and adjust to a plant’s ever-changing demands. They offer remote temperature sensing and quick reaction to temperature changes to improve reliability, decrease warm-up time, and ensure consistent temperature control. AMOT also offers custom hazardous area actuators for plants that require valves and actuators be placed within the hazardous area.

Meet Safety Requirements for Tempered Water Applications

Tempered water systems are used in safety equipment, such as eye wash stations and emergency showers, or in care facilities like hospitals or nursing homes. Regulatory agencies recommend that, in most cases, the temperature of water delivered by tempered systems should be 60-100°F (15-38°C). The lower parameter of 60°F (15°C) allows for continuous flushing without causing hypothermia, and the upper limit of 100°F (38°C) protects against scalding. It can be difficult to maintain control of a tempered system’s outlet water temperature because the temperature of the water provided to the system can fluctuate depending on the source and the location’s climate. AMOT three-way thermostatic mixing valves are a proven way to maintain accurate water temperature in tempered water applications.

AMOT offers low-lead bronze in addition to its regular body materials to help customers meet local regulations in tempered water applications.