Orion KRF70 - Page 17

15
Operation Procedure
Pressure range during operation / How to Correct Vacuum Level
(
Gauge Pressure
)
/Stop
Pressure range during operation
kPa KRF70
・
110(Standard) KRF70(High-pressure)
■
Use as vacuum
pump
(V type)
Continuous
operative
vacuum
60 or lower 80 or lower
■
Use as blower
pump(B type)
Continuous
exhaust
pressure
60 or lower 70 or lower
■
Use as vacuum
pump and
blower pump
(V, B type)
Continuous
operative
pressure
Total of continuous operative
vacuum and continuous exhaust
pressure 60 or lower
Total of continuous operative
vacuum and continuous exhaust
pressure 80 or lower
※1 Recommended range: The pump operating under 1 atmospheric pressure can exert its optimal
performance (life, operation noise, etc.) at a vacuum/pressure within this range.
Use the pump within the recommended range unless the higher vacuum/pressure is required.
※Contact with Orion or Orion dealer for other usage.
How to Correct Vacuum Level (Gauge Pressure)
Correction formula: A = C ＋(101.3－ B)
A : Vacuum level at 1 atmosphere kpa
B : Atmospheric pressure at vacuum level measuring position kpa
C: Reading on compound gauge kpa
Ex) When the reading on the compound gauge is 76kPa and the atmospheric pressure is 973hPa
(97.3kPa), the vacuum level at 1 atmosphere is calculated as follow:76 + (101.3 – 97.3) = 80kPa
To read the accurate vacuum level, use a mercury manometer or an equivalent meter based on
absolute pressure.
Atmospheric pressure conversion formula (hPa → kPa)
B(kPa)=B(hPa)÷10
Stop
Shut off the power switch.