Single-Nozzle Water Jet Exhausters

Principle of Operation of Single-Nozzle Water Jet Exhausters

The Fig. 484 Single-Nozzle Water Jet Exhauster operates on the jet principle. Motive water is supplied to the exhauster under pressure discharging through spray nozzles in a high-velocity, solid jet. Air or vapors are drawn into the body of the exhauster by the draft-producing action of the water jet. The water and air are intimately mixed in the converging section of the venturi or diffuser. In the diverging section, energy of velocity is converted to energy of pressure and the water-air mixture is slowed to a velocity just sufficient to overcome slight backpressure.

Figure 484 Single-Nozzle Water Jet Exhauster sectional drawing with threaded connections
Very high capacities can be obtained with Figure 484 Single-Nozzle Water Jet Exhauster used in continuous processes as mixers, distillation, and proprietary processes

The Fig. 464 General Purpose Single-Nozzle Water Jet Exhauster is designed for laboratory or other general purposes. The Fig. 464 General Purpose Single-Nozzle Water Jet Exhauster is meant to supplement the Fig. 484 Water Jet Exhauster and be used when efficiency is not of prime importance.

Figure 464 Single-Nozzle Water Jet Exhauster for general purposes
Figure 464 Single-Nozzle Water Jet Exhauster for laboratory or other general purpose applications

Fig. 265 & Fig. 485 Water Jet Exhausters are similar in design to the Fig. 464 Water Jet Exhauster and are made for liquid pumping and mixing operations and for handling some solids where requirements do not necessitate capacities greater than those obtained with sizes up to and including 3″.

Figure 485/265 Water Jet Exhauster with removable nozzle
Figure 485/265 Water Jet Exhauster provides higher discharge pressures and higher suction flow capacities than other standard exhausters

Due to simplicity of design, exhausters do not have any moving parts and are subject to little wear. Initial operation and maintenance costs are minimal. Water Jet Exhausters are easily installed, are versatile and reliable, operate under severe conditions, are used where other pumping devices would not be practical, and are ideal for intermittent service.

  • Priming a centrifugal pump.
  • Vacuum pumping.
  • Air and brine removal for distillation.
  • Proprietary chemical processing.
  • In continuous process as mixers.
Steam Jet Exhauster priming a centrifugal pump
Fig. 484 Steam Jet Exhauster Used in Priming a Centrifugal Pump.
Steam Jet Exhausters are widely used for priming centrifugal pumps. The exhauster is mounted on the casing of the pump as illustrated and is used to exhaust air from the pump casing and suction line before the pump is started. Most pumps are located so that the vacuum created in the suction line and casing varies from the equivalent to a 5 ft. lift to that of a 20 ft. lift.

Steam Jet Exhauster used in vacuum pump application
Fig. 484 Exhauster Used in Vacuum Pumping Application.
Simple laboratory arrangement for obtaining low suction pressures with a water jet exhauster using chilled water at about 35°F. This system provides suction pressures approaching 5mm Hg absolute. Unlike other types of equipment, water jet exhausters are compact and low in cost and require no lubrication or oil seals which affect operation under certain conditions