How LPG Vane Pump works

An LPG vane pump is a type of positive displacement pump used for transferring Liquefied Petroleum Gas (LPG). It operates using sliding vanes mounted in a rotor that rotates inside a cavity. Here's a breakdown of how it works:

Working Principle of an LPG Vane Pump

Rotor and Vanes:

The rotor is mounted off-center inside a circular casing (called a cam ring or stator).

It has slots that hold vanes — thin, flat blades that slide in and out due to centrifugal force, springs, or hydraulic pressure.

Rotation and Expansion:

As the rotor turns, the vanes press against the inner wall of the pump casing.

On the inlet side, the space between the vanes increases, creating a vacuum that draws LPG into the pump chamber.

Trapping the Fluid:

LPG gets trapped in the compartments formed between adjacent vanes.

The vanes slide in and out to maintain contact with the cam ring and seal the fluid inside these compartments.

Compression and Discharge:

As the rotor continues turning, the trapped LPG is carried around to the discharge side, where the space between the vanes reduces, thus compressing and forcing the LPG out of the outlet.

Key Design Features for LPG

Material Compatibility: Since LPG is flammable and volatile, materials must be compatible and spark-free.

Tight Sealing: Prevents leakage of LPG vapor.

Relief Valve: Protects against overpressure.

Low-Temperature Operation: LPG can be very cold when under pressure.

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