Carlon Expansion Joints - Manual (Page 4)

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B.
For cold temperature
(20˚ - 30˚ F) set piston
1 / 4 way in barrel.
C.
For hot temperature
(95˚ - 105˚ F) set piston
3 / 4 way in barrel.
Setting Expansion Fitting for Temperature
When a more precise calculation for expansion
is needed, it can be calculated as follows:
Example 1:
1. You must determine the maximum temperature range.
This is done by subtracting the lowest temperature you
anticipate from the highest temperature you anticipate.
Example: Let’s say in winter, we expect the temperature
to get down to -10°F and in the summer, we expect the
temperature to get as high as 110°F. The maximum
temperature range is 110 –(-10) = 120°F.
2. The length of run between fixed points must be determined.
Let’s assume 90 feet for this example.
3. The total expansion change can be calculated as follows:
Total expansion change in inches = (coefficient of thermal
expansion) x (maximum temperature range) x (length of
run in inches).
Example: Total expansion change = (3.38 x 10
-5 in./in./°F) x
(120°F) x (90ft x 12in./ft) = 4.38 in.
Thus, travel can be covered with one expansion fitting in
Carlon trade sizes 2" through 6", which have an 8" travel,
or two expansion fittings in Carlon trade sizes 1/2" through
1-1/2", which have a travel of 4".
4. The “set position” can be determined from the following
example.
Example: If the temperature at installation was 65°F, the
difference from maximum is 110°F – 65°F = 45°F. Use
ratio: (difference from maximum)/(Total expected range) =
45/120 = .375 in.
(0.375) x 8 inch travel = 3 in.
The piston at 65°F would retract 3 inches.
Example 2:
1. You must determine the maximum temperature range.
This is done by subtracting the lowest temperature you
anticipate from the highest temperature you anticipate.
Example: Let’s say in winter, we expect the temperature
to get down to 20°F and in the summer, we expect the
temperature to get as high as 100°F. The maximum
temperature range is 100 – 20 = 80°F.
2. The length of run between fixed points must be determined.
Let’s assume 90 feet for this example.
3. The total expansion change can be calculated as follows:
Total expansion change in inches = (coefficient of thermal
expansion) x (maximum temperature range) x (length of
run in inches).
Example: Total expansion change = (3.38 x 10
-5 in./in./°F) x
(80°F) x (90ft x 12in./ft) = 2.92 in.
Thus, travel can be covered with one expansion fitting.
4. The “set position” can be determined from the following
example.
Example: If the temperature at installation was 65°F, the
difference from maximum is 100°F – 65°F = 35°F.
Use ratio: (difference from maximum)/(Total expected
range) = 35/80 = .4375 in.
(.4375) x 4 inch travel = 1.75 in. or (.4375 x 8 inch travel)
= 3.5 inches
The piston at 65°F would retract 1.75 inches for Carlon
trade sizes 1/2" through 1-1/2" or 3.5 inches for Carlon
trade sizes 2" through 6.
A.
For medium temperature
(65˚ - 75˚ F) set piston
1 / 2 way in barrel.
Gross Automation (877) 268-3700 · www.carlonsales.com · [email protected]