rotary vane pump

These rotary vane pumps are not widely used anymore.

A rotary vane pump is a mechanical pump.

Rotary vane pumps use a cam with retractable vanes to create suction.

The first stage is usually based on a roughing pump, most commonly a standard rotary vane pump.

The hydraulic pressure typically comes from a gerotor or rotary vane pump driven by the vehicle's engine.

The vacuum pump system comprises a rotary vane pump powered by a single phase motor.

Bolle designed the top end of the water barometer to be connected to a rotary vane pump, which was governed by timer relays.

Outgassed water can condense in the oil of rotary vane pumps and reduce their net speed drastically if gas ballasting is not used.

The roots pump forces the rarefied air into the mouth of the rotary vane pump allowing for faster pump down times.

Rotary vane pumps - similar to scroll compressors, these have a cylindrical rotor encased in a similarly shaped housing.

Alcatel - Alcatel's innovated the world's first direct drive rotary vane pumps and pioneered work on helium mass spectrometer leak detectors.

Common UHV pumps include turbomolecular and ion pumps, with roughing pumping typically performed using a rotary vane pump.

Charles C. Barnes of Sackville, New Brunswick invented the rotary vane pump and patented the device on June 16, 1874.

A rotary vane pump is a positive-displacement pump that consists of vanes mounted to a rotor that rotates inside of a cavity.

An operating vacuum of at least 10-5 Pa is normally required which is attained by pumping with turbomolecular or oil-diffusion pumps, backed by rotary vane pumps.

In high vacuum applications, activated alumina is used as a charge material in fore-line traps to prevent oil generated by rotary vane pumps from back streaming into the system.

Javac are the exclusive Australian & New Zealand distributor for the Leybold Sogevac range of Oil Sealed Rotary Vane Pumps.

Some examples might be use of an oil sealed rotary vane pump (the most common positive displacement pump) backing a diffusion pump, or a dry scroll pump backing a turbomolecular pump.

The combustion chamber is fed through a control valve and an inlet pipe by compressed air from a rotary vane pump aside in the fuselage, which extracts ambient air and moderately compresses it into a storage tank.

A classic foreline is a hose or tube that connects a rotary vane pump to the outlet of an oil diffusion pump, although vacuum technology now uses a vast array of roughing pumps and high vacuum pumps.

The function of a liquid-ring pump is similar to a rotary vane pump, with the difference being that the vanes are an integral part of the rotor and churn a rotating ring of liquid to form the compression-chamber seal.

Initially, a low or roughing vacuum is achieved with either a rotary vane pump or diaphragm pumps setting a sufficiently low pressure to allow the operation of a turbo-molecular or diffusion pump establishing high vacuum level necessary for operations.

While the pumping capacity of rotary vane pump is getting lower at lower pressures (because the air is becoming rarefied so each "gulp" of air that the pump takes has less molecules in it), the roots pump is most efficient.