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Pneumatic Sewage Ejectors

The pneumatic ejector is an extremely simple yet reliable mechanism. Fundamentally, it consists of a receiver or “pot’ that allows liquids and solids to enter without restriction. When the pot becomes filled, compressed air is introduced to displace the contents up to a higher discharge line. The pneumatic ejector is unique as a pumping mechanism because no mechanical parts are involved in the actual pumping of the material, and it has no practical limitations on head. Under normal flow conditions, the equipment is designed to operate with a one minute cycle. The cycle consists of two phases: Filling the pot, and then the discharging of its contents. Operation is completely automatic with a choice of electric or mechanical control systems.

Why Specify a Pneumatic Ejector?

  • Superior solid handling, accommodating the free passage of any solids that flow through the influent pipeline, fittings and valves.

  • Positive, non-clogging discharge action that will efficiently move any solids entering the station.

  • Clean and sanitary operation, eliminating undesirable wet well conditions, and permitting easy inspection or maintenance checks without exposure to sewage.

  • Hermetically sealed design prevents the escape of toxic or combustible gases, as well as nuisance odors.

  • Flexible capacity to accommodate variations in flow, including the ability to deliver at somewhat higher than rated capacity during periods of unusual peak loads.

  • Plant air can be utilized, or dedicated compressors will be provided as part of the package.

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