Abstract: A purification column is provided in which fluid is purified by flow through a purifying component. The column includes an annular wall defining a bore which, in use, contains the purifying component. The column further includes an inlet port to the bore comprising a first aperture through the annular wall, the inlet port being adjacent one end of the column. The column further includes an outlet port from the bore comprising a second aperture through the annular wall, the outlet port being adjacent the same end of the column as the inlet port. The column further includes a flow guidance device within the bore and removably connected to the inlet and outlet ports for guiding the fluid to the purifying component from the inlet port and for guiding the fluid from the purifying component to the outlet port. The flow guidance device maintains separation of the fluid flows to and from the purifying component.

Abstract: A filter assembly for collecting material entrained in a fluid stream includes a filter element having a tubular filter and an end cap providing a flow conduit which extends between first and second conduit openings communicating with the internal void of the tubular filter. A housing for the filter element has inlet and outlet ports for the fluid stream, a housing bowl in which the tubular filter is located, and a housing head which provides at least one of the ports as a docking port for the first conduit opening. The housing head and end cap are arranged such that the end cap is inserted into the housing head, and then rotated relative to the housing head about an axis perpendicular to the axis of the tubular filter and to the axis of the first conduit.

Abstract: A purification column is provided in which fluid is purified by flow through a purifying component. The column includes an annular wall defining a bore which, in use, contains the purifying component. The column further includes an inlet port to the bore comprising a first aperture through the annular wall, the inlet port being adjacent one end of the column. The column further includes an outlet port from the bore comprising a second aperture through the annular wall, the outlet port being adjacent the same end of the column as the inlet port. The column further includes a flow guidance device within the bore and removably connected to the inlet and outlet ports for guiding the fluid to the purifying component from the inlet port and for guiding the fluid from the purifying component to the outlet port. The flow guidance device maintains separation of the fluid flows to and from the purifying component.

Abstract: An adjustable flow control device is provided which has a valve body containing a series of orifices of varying diameter and an indexable valve cover which includes at least one flow conduit which can be positioned and locked in a sealable manner over a chosen orifice while the remaining part of the valve cover closes off the other orifices of the valve body. Due to the device having fixed size orifices, each orifice will provide a fixed specific fluid flow rate for any predetermined pressure loss across the orifice. The device is suitable for use on all types of gas and liquid fluids.

Abstract: A banked purification system having, in flow series, an inlet for entry of a fluid, a bank of two or more purification columns in which the fluid is purified by a purifying component, and an outlet for discharging the purified fluid, the columns being arranged in parallel such that the fluid from the inlet splits at first ends of the columns into respective streams which flow through the columns and recombine at second ends of the columns for onward travel to the outlet; wherein the columns have first ports in the side walls of the columns at the first ends, the first ports being connected to each other such that the first ends are placed in fluid communication to create a manifold from the first ends of the columns which splits the fluid from the inlet into said streams.

Abstract: A banked purification system having, in flow series, an inlet for entry of a fluid, a bank of two or more purification columns in which the fluid is purified by a purifying component, and an outlet for discharging the purified fluid, the columns being arranged in parallel such that the fluid from the inlet splits at first ends of the columns into respective streams which flow through the columns and recombine at second ends of the columns for onward travel to the outlet; wherein the columns have first ports in the side walls of the columns at the first ends, the first ports being connected to each other such that the first ends are placed in fluid communication to create a manifold from the first ends of the columns which splits the fluid from the inlet into said streams.

Abstract: An electronic device is disclosed for controlling gas flow in a gas dryer such as a twin tower regenerative gas dryer. The device has a housing in which is mounted an electronic control circuit. At least two electrically operated valves (e.g. solenoid valves) for controlling functions of the dryer are provided with plugs or sockets and adapted to co-operate with corresponding sockets or plugs in a wall of the housing electrically connected to the electronic circuit. The valves are mounted on, externally of, the housing and are electrically connected to the control circuit.