Engineered Systems

Air-Charged Systems

AIR-CHARGED SYSTEMS

In areas where tempered water is required, but there is no potable water supply capable of driving a shower, Haws can provide a fully assembled, warm water system that is driven by compressed air. This air driven system shall meet all the requirements of the current ANSI standard Z358.1-2004.

FEATURES

Storage Tank: Haws will supply a 325 gallon storage tank that is maintained at 80ºF (26ºC). This capacity is required to provide the required 15-minute combination shower at 25 GPM. The tank temperature is maintained with the use of an immersion heater.

Water Supply: Water can either be supplied by the customer via a water truck, or provided by a low-pressure, low-flow potable supply. Water must be potable.

Air Pressure: Water pressure is obtained from two compressed air cylinders. These cylinders are provided with the safety shower equipment, and filled with clean breathing quality air. These cylinders are sized to provide the required 15-minute shower. A pressure regulator manifold is provided to ensure a constant supply of pressure at the showerhead.

Alarms: To guarantee a safe and consistent shower with every use, Haws provides several levels of alarms. These alarms let individuals know there is a problem with the system. All alarms have their own individual dry contact for remote alarming. Any alarm will sound an audible alarm and fl ash the area light. In addition, the main junction box has indicator lights installed to specify which alarm has been activated. Electrical can be either specified explosion-proof equipment or NEMA 4 equipment.

Low Level Alarm: A low level alarm is provided to warn individuals that the tank has dropped to one third of its original capacity. This ensures that the tank is kept at a full level.

Flow Alarm: Like all Haws tempering systems with showers, a flow switch is installed to let others know the shower is in use. This switch operates at flows associated with eyewashes and showers.

High/Low Pressure Alarm: A high/low pressure alarm is incorporated to ensure that the air cylinder manifold is properly set. This is a dual acting switch so both high and low pressure is being monitored.

High/Low Temperature Alarm: A temperature sensing switch is installed directly into the tank. This switch monitors the tank temperature, both high and low, to ensure that the tank heater is operating properly.

ADVANTAGES

In areas where there is not a sufficient potable water supply or no water at all, Haws’ air charged systems can be installed to provide the protection needed against chemical spills. In the event there is a power loss at the time of an accident, the Haws air charged system will still provide a shower. (A pump-driven system would be rendered useless with the loss of power.)

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