robatherm RM - Page 37

Unit assembly
© robatherm 37
Overpressure siphon
Pressure calculation, discharge side
Sample calculation for silencer (B)
This pressure and the associated siphon height apply only to the silencer (B). Always
use the final pressure loss to calculate the filter pressure loss.
External pressure on the discharge side E.g.: +200 Pa
Pressure loss Filter component E.g.: +250 Pa
Pressure loss Silencer E.g.: +15 Pa
Total: p
2
= +465 Pa
Table 2: Pressure calculation for overpressure siphon
This pressure is used to calculate the siphon height for the overpressure siphon (on the
discharge side) at the silencer (B).
C Free discharge at atmospheric
pressure
Fig. 47: Overpressure siphon
This is a sample procedure for calculating siphon height. Use the specific heights of
siphon manufacturers (see siphon data sheet).
The siphon height for an overpressure siphon is determined as follows:
H
S
[mm] = p [Pa] / 10
p [Pa] Maximum internal pressure on the discharge side of the respective component
H [mm] = 35 mm + H
S
+ 50 mm
(Sample calculation for silencer (B) p
2
= +465 Pa)
H = 35 + H
S
+ 50= 35 + 465/10 + 50 = 131 [mm]