WATER HEATER OPERATIONAL FEATURES
Packaged with the Hubbell model EMV hot water heater is a triple redundant, thermostatic pressure balanced valve designed pecifically for emergency safety shower/face/eyewash applications. The valve is factory mounted and piped to the water heater. After water flow is activated at the emergency station, the outlet water temperature from the model EMV package will be maintained at 85°F tepid temperature. The Hubbell EMV is able to achieve the high volume demand required for a safety drench system by mixing the 170°F water in the tank with incoming cold water. The mixing valve meets OSHA and ANSI requirements and is capable of providing constant 85°F output regardless of inlet pressure and temperature variations, and the temperature setting is tamper proof and cannot be inadvertently adjusted in the field. The water temperature is not warm enough to open skin pores and not cold enough to deter usage. The valve is capable of providing a full range of flows from the smallest flow of 0.4 GPM for an eyewash to the combined 23 GPM flow for a simultaneous demand of shower, eyewash, and face wash system.

WATER HEATER SAFETY FEATURES
The mixing valve incorporates a pressure sensing controller with a valve actuator hat senses the water pressure on both the hot and cold water inlet connections. If hot water pressure is not present then the actuator overrides the mixing valve and a flow of cold water is allowed.

If no cold-water pressure is available at the mixing valve inlet then the hot water port will close to prevent overheated water from exiting the mixing valve. The valve also includes a safety override feature that continuously senses the final mixed water temperature. If the final water temperature is overheated, the valve automatically closes the hot water port and fully opens the cold water port. In any of these fault conditions, the Hubbell EMV valve will continue to provide a full flow of water as per the ANSI standard with no additional pressure drop.