A liquid ring pump manifold comprising at least one integrated spray nozzle, the at least one integrated spray nozzle being configured to spray a liquid into the liquid ring pump manifold. The liquid ring pump manifold may comprise at least one socket in which the at least one integrated spray nozzle is accommodated. The at least one socket may be integrally formed with the liquid ring pump manifold.

A centrifugal gas compressor fed with a gas and a processing liquid comprises a rotor rotated by a prime mover. The rotor defines an internal axial cavity with a cylindrical surface, an annular peripheral collection cavity, and a tapered radial channel fluidly connecting the internal axial cavity and the annular peripheral collection cavity. With each rotation of the rotor, a portion of the processing fluid is swept into the inlet of the tapered radial channel and travels radially as a fluid piston under centrifugal force pushing and compressing a column of gas entrained in front of said fluid piston, and is expelled into the annular peripheral collection cavity where it undergoes centrifugal separation, leaving the compressed gas to be drawn off through the compressed gas outlet for downstream use. A method for compressing a gas is also provided.

Liquid ring systems are known for compressing gasses. However, known systems include moving surfaces that require high precision manufacturing. The invention provides a valve arrangement for a liquid ring system comprising: a plurality of plates; a vane set; and a chamber set that comprises at least one chamber, wherein a first chamber of the chamber set comprises: a first valve, disposed on a first plate of the plurality of plates, which is configured to be closer to the first face of a first vane of the vane set than the second face of the second vane of the vane set; and a second valve, disposed on a second plate, which is configured to be closer to the second face of the second vane than the first face of the first vane.

A control system comprising: a suction line; an exhaust line; an operating liquid line; a liquid ring pump comprising a suction input coupled to the suction line, an exhaust output coupled to the exhaust line, and a liquid input coupled to the operating liquid line; a motor configured to drive the liquid ring pump; a first sensor configured to measure a first parameter of an exhaust fluid of the liquid ring pump; a second sensor configured to measure a second parameter of a gas being received by the liquid ring pump via the suction line; and a controller operatively coupled to the first sensor, the second sensor, and the motor, and configured to control the motor based on sensor measurements of the first sensor and the second sensor.

A centrifugal gas compressor fed with a gas and a processing liquid comprises a rotor rotated by a prime mover. The rotor defines an internal axial cavity with a cylindrical surface, an annular peripheral collection cavity, and a tapered radial channel fluidly connecting the internal axial cavity and the annular peripheral collection cavity. With each rotation of the rotor, a portion of the processing fluid is swept into the inlet of the tapered radial channel and travels radially as a fluid piston under centrifugal force pushing and compressing a column of gas entrained in front of said fluid piston, and is expelled into the annular peripheral collection cavity where it undergoes centrifugal separation, leaving the compressed gas to be drawn off through the compressed gas outlet for downstream use. A method for compressing a gas is also provided.

A liquid ring pump manifold comprising an integrated non-return valve, the integrated non-return valve being configured to permit flow of fluid through the liquid ring pump manifold in a first direction and to prevent or oppose flow of fluid through the liquid ring pump manifold in a second direction, the second direction being opposite to the first direction.

A control system comprising: a suction line; an exhaust line; an operating liquid line; a liquid ring pump comprising a suction input coupled to the suction line, an exhaust output coupled to the exhaust line, and a liquid input coupled to the operating liquid line; a pump configured to pump operating liquid into the liquid ring pump via the operating liquid line and the liquid input; a motor configured to drive the pump; a first sensor configured to measure a first parameter, the first parameter being a parameter of an exhaust fluid of the liquid ring pump; a second sensor configured to measure a second parameter, the second parameter being a parameter of a fluid received by the liquid ring pump; and a controller operatively coupled to the first sensor, the second sensor, and the motor, and configured to control the motor based on sensor measurements of the first sensor and the second sensor. The control system advantageously tends to reduce or eliminate the wear caused by cavitations.

A control system comprising: a suction line; an exhaust line; an operating liquid line; a liquid ring pump comprising a suction input coupled to the suction line, an exhaust output coupled to the exhaust line, and a liquid input coupled to the operating liquid line; a pump configured to pump operating liquid into the liquid ring pump via the operating liquid line and the liquid input; a motor configured to drive the pump; a first sensor configured to measure a first parameter, the first parameter being a parameter of an exhaust fluid of the liquid ring pump; a second sensor configured to measure a second parameter, the second parameter being a parameter of a fluid received by the liquid ring pump; and a controller operatively coupled to the first sensor, the second sensor, and the motor, and configured to control the motor based on sensor measurements of the first sensor and the second sensor. The control system advantageously tends to reduce or eliminate the wear caused by cavitations.

A system comprising: a suction line; a liquid ring pump coupled to the suction line, the liquid ring pump comprising a chamber and an impeller mounted within the chamber; a non-return valve arranged to permit fluid to flow into the chamber via the suction line and to prevent or oppose fluid flow out of the chamber to the suction line; a gas line coupled to the liquid ring pump such that a gas may flow into the liquid ring pump via the gas line, the gas line coupled to the liquid ring pump between the non-return valve and the chamber; a valve disposed on the gas line; and a controller configured to control the valve.

The present invention relates to a two-stage liquid ring vacuum pump in which two-stage impellers are attached to an axial end portion of a main shaft (rotating shaft) of a motor. The two-stage liquid ring vacuum pump includes a first-stage impeller (4) provided in a first-stage pump chamber (1), a second-stage impeller (5) provided in a second-stage pump chamber (2), a single rotating shaft (7) to which the first-stage impeller (4) and the second-stage impeller (5) are fixed, and an exhaust port (Pd) of the first-stage pump chamber (1) and an intake port (Ps) of the second-stage pump chamber (2) which communicate with each other. An outer diameter of the first-stage impeller (4) is larger than an outer diameter of the second-stage impeller (5).