Alfa Laval Gunclean Toftejorg 270FT Mark 1, Инструкция по эксплуатации

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Page 22 Instruction Manual, Gunclean Toftejorg 270FT Mark I
IM-TE102766-3-EN10
Installation and Normal Operation
(continued)
How to Calculate Pitch Angle
Calculating formula
Number of revolutions on shaft A to
make one revolution on shaft B
= C
Pitch/revolution of gun = D
Pitch/revolution of gun = D =
153
C
Example
C: Number of revolutions of shaft A = 51
D: Pitch/revolution of gun
153
C
= D
153
51
= 3° pitch
How to calculate cleaning time
The cleaning time depends on pitch angle and rotation speed.
A full cycle 0° - 150° - 0° (300°) with 1° pitch angle and 1 rpm takes 300 minutes.
Because of varying pitch angles and small changes in rotation speed during cleaning, all figures are
approximate.
The RPM is preset at factory based on the specified pressure. If the actual pressure is higher than what
originally has been specified, the nozzle will move faster and the total cleaning time will be reduced
accordingly.
The tolerance for the RPM setting is
±
15 sec./rev. depending on the actual position of the gun.