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4 - HYDRAULIC CONNECTIONS
THEORETICAL CALCULATION OF THE DRAIN TRAP
The theoretical calculation of the height of the drain trap
involves a number of considerations, depending on the
position of the drain trap in reference to the fan.
Failure to heed the following rules will lead to the emptying of
the drain trap and thus incorrect draining of the tank.
p
H
S
T
p: pressure in the tank being drained in mm wc (1 mm wc =
9.81 Pa)
T: vertical distance between the lower edge of the tank drain
and the upper edge of the first loop of the drain trap (mm)
S: vertical distance between the upper edge of the first loop of
the drain trap and the lower edge of the second loop (mm)
(1)
(1)
Formula:
T = - 2 p
S = T /2
Example
p = - 300 Pa = - 30 mm
T = 60 mm
S = 30 mm
Formula
T = 2 p
S = T /2
Example
p = 400 Pa = 40 mm
T = 80 mm
S = 40 mm
1. Discharge
DEPRESSION DISCHARGE
PRESSURE DISCHARGE
