Adjusting solution ConCentrAtion
To increase the concentration of the solution in the system,
determine the percent of glycol in solution and apply the fol-
lowing equation:
Qa = Vs (Pd - Pt)
(100 - Pt)
Qa = Quantity, in gallons, to be added
Vs = System volume
Pd = Percent of solution desired
Pt = Percent of solution by test (Initial percent)
Drain the determined number of gallons from the system and
refill with glycol concentrate. Raypack – A Rheem Company: For over 50 years, Raypak has
been a world-leading manufacturer of copper finned boilers and
heaters. From a modest beginning in 1947 in founder Al Whittel's
garage in Southern California, Raypak now supplies equipment
all over the world from its manufacturing facilitiy in Oxnard,
California, and its licensee in England.
l F O N
www.fueloilnews.com | FUEL OIL NEWS | FEBRUARY 2014 41
HVAC/ HydrONiCs
System volume = Vs = 120 gallons
Initial percent of solution from test = Pt = 30% (+4F freezing point)
Percent of solution desired = Pd = 50% (-34F freezing point
Qa = 120 (50 - 30)
(100 - 30)
Qa = 34.3 gallons required
Pipe Size Steel Pipe-IPS Copper Tube - Nom.
1/2 0.016 0.015
3/4" 0.027 0.025
1" 0.044 0.044
1 1/4" 0.077 0.068
1 1/2" 0.105 0.095
2" 0.173 0.160
2 1/2" 0.248 N/A
Table 3. Capacity of Pipe or Tube in U.S. Gallons Per Linear Foot
Example:
