FILTER VESSELS

Sand Water Filter Tanks Water that contains particulates can be purified by passing it through a tank containing a filter medium. Depending on the nature of the contaminants and the eventual purpose of the filtered water, filter media can be sand, activated carbon, anthracite, or combinations of special materials. The incoming water flow is distributed evenly through the filter medium by a diffuser, and there is usually a back flow function designed into the system to flush out the contaminants periodically. Hanson Tank has manufactured both the basic vessels and complete systems, although the filter medium is usually supplied and installed by others.

HYDROPNEUMATIC TANKS

Hydropneumatic Tank Any vessel that contains both water and air under pressure can be called a hydropneumatic tank. The two most common applications are in well water systems, or as buffer tanks to absorb water hammer shocks in large capacity pumping systems. In both cases, the captive compressed air acts as a cushion which can exert or absorb pressure as required.

Large hydropneumatic tanks are usually horizontal and 2000 gallons or more. Hanson Tank has manufactured hydropneumatic tanks up to 30,000 gallon capacity. The size is determined by the needs of the system, and is approximately the drawdown gallons times four. A small air compressor can be included to replenish the air volume periodically as it is absorbed into the water. Sensors monitor the water level and pressure and automatically control compressor operation as required. These vessels are usually lined to prevent corrosion and have a design working pressure of 125# ASME. Hanson Tank can manufacture the basic tank or supply all the components for a complete system ready to install.

Tanks that include an internal bladder are usually smaller, and sometimes called captive air or bag tanks. There are styles that are designed to replace the expansion tank in a domestic hot water system. All bladder tanks are usually a standard vertical design. On larger versions, the bladder is often replaceable through a flange, which can be either on the top or bottom of the tank depending on the application.

Vertical hydropneumatic tanks can also have a diaphragm which can be fixed or floating. This virtually eliminates the absorption of the air into the water over time and makes the compressor unnecessary. These are built to order only.

SIZES

Hanson Tank manufactures water tanks from 12" to 12' in diameter up to 70 feet long. Although standard tank heads (end caps) are manufactured in 6" increments, any diameter or length of vessel is available. Here are some typical sizes. Please note that all our tanks are cylindrical. Rectangular or square pressure vessels are very unusual and not part of our product line.

Size

Capacity
US Gallons

Gallons
per inch

 

Size

Capacity
US Gallons

Gallons
per inch

12" x 34"

15

0.46

 

60" x 160"

1820

12.2

18" x 49"

50

1.06

 

66" x 182"

2500

14.6

24" x 65"

120

1.9

 

72" x 231"

3800

17.6

30" x 70"

200

3.0

 

78" x 236"

4550

20.7

36" x 88"

360

4.3

 

84" x 229"

5000

23.0

42" x 96"

520

5.8

 

96" x 275"

8000

31.3

48" x 104"

735

7.7

 

120" x 360"

16400

48.5

54" x 115"

1040

9.7

 

144" x 576"

37700

70.5


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