Abstract: A system for determining the position of a pig located inside a pipe including a magnetic field source attached to the pig; at least one magnetic field sensor provided on the outside of the pipe and configured to measure magnetic field parameters; and a processor configured to receive magnetic field parameters from the at least one magnetic field sensor and computing a position of the magnetic field source relative to a given reference position. The method includes: establishing a magnetic field representation of the magnetic field provided by the magnetic field source; in-situ measuring at least two magnetic field parameters outside the pipe with a magnetic field sensor at a measuring position relative to the reference position; computing the source position of the magnetic field source relative to the reference position based on data comprising the in-situ measured magnetic field parameters and the magnetic field representation.

Abstract: A hydrocyclone for separation solid particles from a liquid is disclosed. The hydrocyclone includes a ceramic cyclone head, a ceramic cyclone main body, and a metal enclosure. The metal enclosure includes at least an upper metallic enclosure part and a main metallic enclosure part. A lower section of the upper metallic enclosure part includes mateable circumferential threads and an upper section of the main metallic enclosure part includes mateable circumferential threads. The mateable circumferential threads of the upper metallic enclosure part and the mateable circumferential threads of the main metallic enclosure part are mateable with each other.

Abstract: A power supply system for an AC type of coalescer including a first transformer, a controllable transformer, a resonant control circuit and a control system. The first transformer has a primary winding with first and second primary terminals and a secondary winding with first and second secondary terminals, where the first and second secondary terminals are provided for connection to electrodes of the coalescer. The controllable transformer has a primary side for connection to an AC power source and a secondary side connected to first and second nodes, where the second node is connected to a second primary terminal of the first transformer. The resonant control circuit is connected between the first node and the second node. The control system is controlling the controllable transformer. The power supply system further comprises a capacitor connected between the first node and a first primary terminal of the first transformer.

Abstract: Hydrocyclone comprising a ceramic cyclone head with at least one feed inlet, a upper outlet, and a head chamber a ceramic cyclone main body with a lower outlet and a main chamber, wherein ceramic cyclone main body is connected to the ceramic cyclone head so that the head chamber is in fluid communication with the main chamber; a metal enclosure with a corresponding feed inlet opening and corresponding outlet openings; wherein the metal enclosure comprises at least an upper metallic enclosure part adapted to enclose at least part of the ceramic cyclone head and a main metallic enclosure part adapted to enclose at least a part of the ceramic cyclone main body, wherein the upper metallic enclosure part comprises circumferential threads in a lower section thereof and the main metallic enclosure part comprises circumferential threads in an upper section thereof, wherein said circumferential threads are mateable.