The invention relates to a compressor system for a rail vehicle, having: a compressor, a cooling device and a control device or an interface for receiving control signals of a control device, wherein the control device is configured to actuate the cooling device independently of the operation of the compressor, and to be able to provide a variable cooling fluid volumetric flow rate, in particular a cooling air volumetric flow rate, which can be specified by way of the control device as an actuating variable.

The invention relates to a compressor system for a rail vehicle, having: a compressor, a cooling device and a control device or an interface for receiving control signals of a control device, wherein the control device is configured to actuate the cooling device independently of the operation of the compressor, and to be able to provide a variable cooling fluid volumetric flow rate, in particular a cooling air volumetric flow rate, which can be specified by way of the control device as an actuating variable.

A pump trailer including a frame, a pump and at least one locomotion member. The pump is suspended within the frame using an elevator. The at least one locomotion member is coupled to a base of the frame to facilitate motion of the frame over terrain. The elevator raises the pump to a fully raised position or lowers the pump to a pumping position.

A pump trailer including a frame, a pump and at least one locomotion member. The pump is suspended within the frame using an elevator. The at least one locomotion member is coupled to a base of the frame to facilitate motion of the frame over terrain. The elevator raises the pump to a fully raised position or lowers the pump to a pumping position.

Embodiments of the present disclosure relate to a refrigeration system that includes a compressor configured to circulate refrigerant along a refrigerant loop, a motor configured to drive the compressor, and a variable speed drive coupled to the motor and configured to supply power to the motor. The variable speed drive includes a primary winding of a step down transformer coupled to an alternating current (AC) power source, a first secondary winding of the step down transformer, where the first secondary winding is configured to supply power at a variable supplied voltage to the motor when the motor operates below a threshold voltage, and a second secondary winding of the step down transformer, where the second secondary winding is configured to supply power at a fixed supplied voltage when the motor operates at or above the threshold voltage.

Embodiments of the present disclosure relate to a refrigeration system that includes a compressor configured to circulate refrigerant along a refrigerant loop, a motor configured to drive the compressor, and a variable speed drive coupled to the motor and configured to supply power to the motor. The variable speed drive includes a primary winding of a step down transformer coupled to an alternating current (AC) power source, a first secondary winding of the step down transformer, where the first secondary winding is configured to supply power at a variable supplied voltage to the motor when the motor operates below a threshold voltage, and a second secondary winding of the step down transformer, where the second secondary winding is configured to supply power at a fixed supplied voltage when the motor operates at or above the threshold voltage.

A module for a vacuum pumping and/or abatement system. The module comprises a frame defining a space, a plurality of facilities inputs configured to receive facilities from a facilities supply, a plurality of facilities outputs configured to output the received facilities out of the module, and a plurality of facilities connection lines located at least partially within the space defined by the frame. The plurality of facilities connection lines connect the facilities inputs to the facilities outputs. The module further comprises a controller configured to control supply of facilities received at the facilities inputs out of the facilities outputs; and control operation of one or more vacuum pumping and/or abatement apparatuses remote from the module.

A module for a vacuum pumping and/or abatement system. The module comprises a frame defining a space, a plurality of facilities inputs configured to receive facilities from a facilities supply, a plurality of facilities outputs configured to output the received facilities out of the module, and a plurality of facilities connection lines located at least partially within the space defined by the frame. The plurality of facilities connection lines connect the facilities inputs to the facilities outputs. The module further comprises a controller configured to control supply of facilities received at the facilities inputs out of the facilities outputs; and control operation of one or more vacuum pumping and/or abatement apparatuses remote from the module.

A package-type compressor includes a body unit, a controller, a casing, a first cooling air inlet, a second cooling air inlet, a cooling air outlet, a fan duct, a cooling fan, an air cooling type heat exchanger, a machine chamber, and a cooling duct. The cooling duct is provided below the fan duct, the cooling duct causing the cooling air taken in at the second cooling air inlet to flow along the controller toward the suction port of the fan duct. A vertical projection plane of the cooling fan overlaps the machine chamber and the cooling duct.

The present application relates to the technical field of air inflating and air pumping device, which providing an air bag air-inflating and air-pumping device that comprises an air valve unit, an air pump unit and an air-inflating and air-pumping switching valve unit; the air valve unit is connected to the air-inflating and air-pumping switching valve unit and the air-inflating and air-pumping switching valve unit is connected to the air pump unit, wherein the air valve unit comprises air valve sets and the air valve set comprises one air bag and one or two air valves; the air pump unit comprises an air inlet port and an air exhaust port to provide force for inflation and deflation; the air-inflating and air-pumping switching valve unit includes a triple valve.