Heat exchangers

Fabrication: All T.I.G. Welded

Max Operating Temp: 500 F

Max Working pressure: 150 PSI

Note: In all drawings and graphs End designated A is fluid from the heat source, (from solar panel or boiler). End designated B is fluid to be heated (domestic hot water, water for space heating, swimming pool, hot tub or spa water, etc.)

water to water and flow rate shown is for end A.

How to use graph:

For Example: (Known Conditions)

Flow rate through End A = 5 GPM; Inlet Temp End A = 140 F; Inlet Temp End B = 55 F

Determine the temperature differential by subtracting the inlet temperatures (140 F - 55 F = 85 F). Locate 85 on the bottom of the graph. Draw a line vertically until it intersects the 5 GPM line. Draw a line horizontally from the intersection point to the left side of the graph and read the BTU/HR. transferred.

This example would show 90,000 BTU/HR.

through End B must be equal to or

greater than flow rate of End A.

How to use graph:

For Example: (Known Conditions)

Flow rate through End A = 5 GPM; Flow Rate Through End B = 5 GPM

Locate 5 on the bottom of the graph and draw a line vertically until it intersects End A curve. Draw two lines horizontally from the points of intersection of each curve to the left side of the graph and read the pressure drop.

This example would show End A Pressure Drop = 3 P.S.I. End B Pressure Drop = 1.5 P.S.I.

For Example: (Known Conditions)

Flow rate through End A = 5 GPM; Flow Rate Through End B = 5 GPM

Locate 5 on the bottom of the graph and draw a line vertically until it intersects End A curve. Draw two lines horizontally from the points of intersection of each curve to the left side of the graph and read the pressure drop.

This example would show End A Pressure Drop = 3 P.S.I. End B Pressure Drop = 1.5 P.S.I.