7 | Commissioning
20 | 36
Instruction Manual Supplement DOLPHIN VL Systems_EN_en
The working pressure of the vacuum pump shall therefore be sufficiently above the vapor pressure
of the operating liquid. In particular the pressure control in the vacuum system must by no means
be achieved by throttling or even closing of the suction line!
The vapor pressure of the operating liquid and consequently the ultimate pressure can be reduced
by cooling. However, this increases the cooling water flow considerably. In most cases the low ulti-
mate pressure is not required and cavitation shall be avoided by means of vacuum limitation rather
than cooling.
The machine is fitted with anti-cavitation line and valve (ACV). When cavitation is observed, open the
valve to bleed gas into the vacuum pump to reduce cavitation.
