Pump separating gas from liquid

A pump separating gas from liquid comprising:

• a pump housing defining a space area containing a working fluid, circulating a flow of liquid from a pump inlet on a cover plate to a pump outlet on a frame structure;
• a motor and driving mechanism comprising an electric motor fixed on the frame structure so that a drive shaft must satisfy concentricity with an inner circumference of the frame structure;
• an impeller cluster consists of an axial impeller in the shape of two or more spiral blades and a centrifugal impeller in the shape of plural vanes extending from a center to an outside, the axial and centrifugal impellers are mounted in succession on the drive shaft and fixed by bolts and an anti-turn, and the axial impeller are located just behind the pump inlet;
• a sealing assembly includes an oil seal, an oil seal plate and a first O-ring, are fixed to the frame structure by a baffle and bolts, wherein the baffle divides the pump housing into an empty chamber and a working fluid chamber;
• on the baffle there is an opening that creates a flow of liquid and gas into the empty chamber;
• a gas separator including a valve seat, a spring and a valve body, all of which are fixed to the frame structure based on a gas separator cap and bolts sealed by a second O-ring;
• the gas separator has a gas discharge duct connected to the empty chamber to draw the gas to the outside and a bleed hole connected to the pump outlet.