1. Required Chiller Volume: ________ Gallons
Manufacturer of chiller unit’s recommended ‘gallons per ton’ of cooling. Typical 3 – 6 gallons per ton. Critical accuracy: 6 – 10 gallons per ton.
2. Actual Gallon Volume in the entire chiller system: _______ Gallons (including piping)
(1) Chiller requirements gallons: _______ (-) minus (2) Actual gallons in system = _______ gallon size of buffer tank.
Niles Steel Tank manufactures a standard line of vertical and horizontal buffer tanks. Tanks are equipped with an internal baffle and standard flanged connections on 210 gallon and above. Baffles can be added to horizontal tanks as well. Since Niles Steel Tank is a custom tank fabricator, we would be happy to add or change our current design to suit your specific requirements. Grooved pipe end fitting are available in place of flanged connections. Our 2-part, closed cell foam spray on insulation can be added to any size tank and is durable enough for outdoor applications.
Furnish and install as shown on plan, a Niles Steel Tank A.S.M.E. Buffer tank of _____gallons, _____ diameter with an overall height of _______. The tank must be designed, constructed and stamped 125 psi @ -20F to 400F in accordance with section VIII, Division I of the A.S.M.E. Boiler and Pressure Vessel code and registered with the National Board of boiler and pressure vessel inspections. The buffer tank shall be painted with 1) coat of red oxide shop primer paint. A manufacturers data report for pressure vessels, Form U-1A as required by the provisions of the A.S.M.E. Boiler and Pressure Vessel code shall be furnished for each buffer tank upon request.
To properly size the buffer tank, calculate the systems total capacity including all piping and terminal equipment. Subtract that number from the chiller manufacturers recommended system capacity. If a 100 ton chiller requires 1000 gallons of system capacity for high accuracy control and the total piping system totals only 600 gallons, a 400 gallon buffer tank would be required. (As an example)
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