The liquid separator with integral sight glass separates liquids, if present, from gases and allows a technician to visually confirm the presence or absence of liquids in the gas. The present invention is typically used when taking a spot sample from a natural gas pipeline. Spot samples of natural gas are often analyzed by gas chromatographs which do not tolerate the presence of liquids in a sample. If the technician visually confirms the presence of liquids, adjustments to the spot sampling technique can be made to possibly eliminate the creation of such liquids due to poor technique.

A device for separating liquid from liquid-containing compressed gas. The device comprises two tanks (1,4) one situated above the other. The lower tank (1) is provided with a compressed gas inlet (2) which is directed against a surface (3) of the tank to cause separation of the major part of the liquid. The upper tank (4) is provided with a shell (6) having an access opening (9) at its upper end. The gas flow enters the upper tank (4) through a conduit (12) and passes then through opening (9) and a zigzag-shaped channel formed by walls (10,3,14,15) in shell (6). The gas flow then passes through filter (5,16). Separation is performed in several steps by change of direction of the gas flow and by filtering. Positioning of the access opening (9) at the top allows considerable expansion of the liquid-gas mixture without contamination of the filter (5,16).

This invention relates to an apparatus for air compressing and dust collecting and particularly to one which comprises a housing. A 12V DC motor having a shaft is disposed in the housing. A propeller is loosely mounted on the first end of the shaft and can be driven to rotate by means of a clutch which is secured to the first end thereof and controlled by a sliding member so that this apparatus can be served as a dust collector. A gear is loosely mounted on the second end of the shaft and can be driven to rotate by means of another clutch which is secured to the second end thereof and controlled by the sliding member. The gear is arranged to mesh in a reduction gear on which a linking rod is eccentrically disposed. A cylinder with a piston received therein is adjacent to the reduction gear and the piston therein is connected to the linking rod such that when the gear is driven to rotate, the reduction gear in turn is rotated to drive the piston to move back and forth along the axial direction of the cylinder thereby achieving the air compressing purpose.

A portable individular dust collector has a cover which surrounds a rotatable cup. A hood is supported on the cover and houses a prefiltration unit carrying an auxiliary cup containing a filtering foam. The prefiltration unit and said hood define an external peripheral space which is in communication with an annular volume provided beneath said prefiltration unit around a central air inlet in the direction of the rotatable cup to retain the coarser particles of dust.

A compressed air servicing unit is provided, which possesses a plurality of modules, such as pressure controllers, filters oilers or the like, adapted to be attached together in any desired order and having module housings, one of such modules being designed in the form of a monitoring unit for the other modules and being electrically connected with same. A bus line, connecting the modules together, of a bus system is provided and furthermore the monitoring module performing control functions as well is provided with a central unit of the bus system and the other modules are provided respectively with a bus subscriber station, sensors and/or actuators present in or on a module respectively, being connected with the associated bus subscriber station. This means that the modules may be arranged in practically any desired order and in an desired number without any problem occurring with electrical wiring or due to incorrect bus subscriber station connections.