Hydropneumatic tank design manual

It is the purpose of this invention to provide an improved control and apparatus for maintaining the air-water volume in a hydropneumatic tank. FIG. 1 is a side view of a hydropneumatic tank system embodying the present invention. FIGS. 2A and 2B are a circuit diagram of a control embodying the present invention. Hanson Tank has manufactured hydropneumatic tanks (HT) up to 30, gallon capacity. The size is determined by the needs of the system, and is approximately the drawdown gallons times four. These vessels are usually lined to prevent corrosion and generally have a design working pressure of # ASME. It is the role of the design consultant to use this manual while working in tandem with the WSD staff to arrive at the proper engineering solution for the situation. Any deviation from the design criteria presented in this manual shall be identified by the design consultant and presented to the City for approval during the design effort.

Properly sized hydropneumatic tanks are a non-negotiable element in a domestic water pressure booster system--including variable speed systems. Without a hydropneumatic tank, pumps will short cycle on and off during no flow periods. Even a leaky faucet can cause pumps to operate unnecessarily without this pressurized reserve of water. Design Manual December DOH (REV. 12/09) Water System Design Manual December For more information or additional copies of this publication contact: Office of Drinking Water Constituent Services Section Chapter Hydropneumatic (Pressure) Tanks. tanks greater than gallon capacity. Galvanized tanks which are not provided with the necessary fittings and were installed before July 1, , shall be exempt from this requirement. 6. Hydropneumatic pressure tanks shall be painted, disinfected and maintained in strict accordance with current American Water Works Association (AWWA) standards.

Design Manual December DOH (REV. 12/09) Water System Design Manual December Chapter Hydropneumatic (Pressure) Tanks. The pressure tank maintains the pumping-cycle rate required to avoid overheating the pump motor and premature motor failure. Hydropneumatic tanks work best with an air cushion of ¼ to ½ the tank capacity. This cushion decreases as water absorbs air and the tank loses its ability to pressurize the system. To keep that from happening, there must. pump and hydropneumatic tank system should be installed and sized in accordance with sections (1)(B) and (2)(B) above. (D) Hydropneumatic tanks should not be used for fire protection. (3) Section B(f)(1) of the RCSA requires that all service connections have a minimum.