Atlas Copco Airpower, Naamloze Vennootschap

Pieter De Schamphelaere

Stijn Broucke

Kristof Adrien Martens

Daniel Joseph Smith

An oil-injected multi-stage compressor system that comprises at least a low-pressure stage compressor element () with an inlet () and an outlet () and a high-pressure stage compressor element () with an inlet () and an outlet (), whereby the outlet () of the low-pressure stage compressor element () is connected to the inlet () of the high-pressure stage compressor element () through a pipeline (), characterized in that the compressor elements () are provided with their own drive in the form of an electric motor (), whereby the compressor elements () are connected to the electric motor () either directly or through a gearbox and that an intercooler () is provided in the aforementioned pipeline () between the low-pressure stage compressor element () and the high-pressure stage compressor element ().

Oil-injected multi-stage compressor system and procedure for controlling such a compressor system

A minimum pressure valve () comprising a housing () with the valve inlet () and the valve outlet () connected with each other by a chamber and connecting space (), the minimum pressure valve () also comprising a valve body () set up in a chamber () moveably between a closed position in which the valve inlet (11) is closed and an open position in which the valve inlet () is open, the minimum pressure valve () also comprising components which are provided with a seal and/or sliding parts (), whereby a subassembly () of the minimum pressure valve () can be disassembled and/or assembled through an opening () in the housing ().

Minimum pressure valve and method for servicing such a valve

Unloader for a compressor, said unloader () comprising a housing () with an inlet () and an outlet (), and whereby the unloader () is further provided with a piston rod () which is arranged moveably in a reciprocating manner in the housing (), whereby on one end () of the piston rod () a valve () is provided to be able to close the outlet () and whereby on the other end () of the piston rod () a piston () is arranged, the piston being arranged moveably in a reciprocating manner in a thereto provided cavity () of the unloader (), said cavity () being at least partially delimited by a lid () which is provided on the housing () and which is also part of the unloader (), whereby sealing means () are provided for the leakage-free movement of the piston () in said cavity (), whereby the cavity () in which the piston () is arranged moveably in a reciprocating manner is provided at least partially in the lid ().

Unloader for a compressor and servicing thereof and compressor provided with an unloader

The present invention is directed to a minimum pressure valve comprising a housing () with a valve inlet () and a valve outlet () which are connected by means of a chamber (), said minimum pressure valve () further comprising a valve body () movable in said chamber () between a closed position in which said valve inlet () is closed off, and an open position in which said valve inlet () is open, whereby said minimum pressure valve () further comprises a regulation unit () for setting the value of the pressure at which the valve body () moves into an open position.

Minimum pressure valve and compressor comprising such a minimum pressure valve

An oil-injected multistage compressor device that comprises at least one low-pressure stage compressor element () with an inlet () and an outlet () and a high-pressure stage compressor element () with an inlet () and an outlet (), whereby the outlet () of the low-pressure stage compressor element () is connected to the inlet () of the high-pressure stage compressor element () via a conduit (), characterized in that an intercooler () is provided between the low-pressure stage compressor element () and the high-pressure stage compressor element () in the aforementioned conduit () and that the compressor device () is also equipped with a restriction () for limiting the amount of oil injected in the low-pressure stage compressor element ().

Oil-injected multistage compressor device and method for controlling such a compressor device

Liquid injected screw compressor with an inlet valve and blow-off valve; a liquid circuit with injector; a controller for the transition from unloaded to loaded, whereby when unloaded the inlet valve is closed and the blow-off valve is open, and when loaded the inlet valve is open and the blow-off valve is closed, and whereby during an aforementioned transition, when the injection pressure is below a minimum threshold, the inlet valve remains closed and is opened with a certain delay and that there are means to gradually increase the injection during this delay and to open the inlet valve when the injection pressure has reached the minimum threshold.

Liquid injected screw compressor, controller for the transition from an unloaded state to a loaded state of such a screw compressor and method applied therewith

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Wilrijk, Belgium

Pieter De Schamphelaere