Vacum pump for powder handling

 

Principle of operation

These pumps work according to the rotary vane principle. An eccentrically installed rotor (8) rotates in the cylinder. The centrifugal force of the rotation pushes the rotor vanes (7), which glide in slots in the rotor, towards the wall of the cylinder. The vanes separate the sickle-shaped space between rotor and cylinder into chambers. When the chambers are connected with the inlet channel, gas is sucked in, compressed by the next rotation and pushed into the oil mist separator (1). The differential pressure constantly causes oil to be pressed into the compression chambers. The oil and the medium are then discharged into the oil separator and there separated from the exhaust air by gravity, a demister (12) and the discharge filter (9). The oil collects on the bottom of the oil separator and is then pushed into the compression chamber again (oil circulation). The oil-free medium is discharged through the discharge cover (10) into atmosphere.

 

Versions

Further pump descriptions state the nominal displacement and the design level:

Example:

RA 0800 B

RA = Ultimate pressure 0,5 hPa (mbar)

0800 = Nominal displacement = 800 m3/h

B = Design level

The RA version, if used constantly, requires an oil-return suction to be installed into the Bendplate. Operating pressure must be 300 hPa (mbar).

 

Principal options/ accessories

• Start relieve bypass

Bypass tube for the relieve at the start phase

• Oil level switch for the check of the oil level

• Heat exchanger oil-water as an additional cooler

• Gas ballast valve in cylinder covers (fan and/or motor side)

A gas ballast valve can be installed in cylinder cover at fan side. To increase the capacity of vapours, another gas ballast valve can be installed in the cylinder cover at the motor side. The valve can be open, or close the gas ballast during the operation of the pump In case of questions about the application and