EPP Pneumatic Lift Station (pneumatic ejector)


EPP pneumatic sewage lift station (pneumatic ejector) is a patented device (US 8,641,386 B2, US 8,347,912 B2) for lifting sewage with compressed air which refreshes the sewage and prevents putrefying during transport.

These are complete and fully automated installations, which do not require any constant operation by technicians. They are intended to pump municipal waste in pressure sewage systems, in a wide range of capacities and delivery heads solely with the use of compressed air: a system without any pumps.

In addition, the EPP pneumatic sewage lift station (pneumatic ejector) has been created in order to minimize air consumption (it is equipped with a special system of saving and recovery of air), so that the overall energy efficiency of the whole system is higher than in other lift stations with separation of solids.

Production and sale of such a product as the EPP pneumatic lift station complements the niche market for the product giving new functional and utility values.

Our sewage lift station brings a new quality to its operating and characteristics of work. The EPP lift station satisfies specific needs of customers and strengthens SZUSTER system’s brand image, which emphasizes on innovation.

Technical data

  • Patents no.: US 8,641,386 B2, US 8,347,912 B2.
  • Comply with harmonized norm EN 12050-1,2,4.
  • Comply with the requirements of the Directive: 89/106/EWG.
  • Lifting height up to 10 bars.
  • Free passage from 3″ to 6″.


  • Sewage pumping over very large distances and/or heights (pumping pressure to 10 bars).
  • Municipal or industrial sewage.
  • Main, zonal or local lift station.
  • Pumping sewage in sections threaten by putrescibility in the discharge pipe (periodic aeration and/or emptying of the pipeline from the wastewater function).

In comparison with traditional systems with submersible pumps our product provides many benefits.

For Users

  • Refresh pumped sewage and prevent putrefying during transport.
  • Allow periodic entire emptying of pressing pipeline using compressed air.
  • Allow the possibility to adjust the efficiency of the lift station to the current requirements without replacing any equipment.
  • Enable safe and hygienic operation by placing technological part in the dry chamber.
  • Do not cause any silting or formation of sludge and surface scum being the result of sedimentation and floatation in the retention chamber.

For Engineers

  • Allow the possibility to pump sewage over very large distances and/or heights (working pressure 8-10 bars).
  • Allow the possibility to adapt the capacity of the system to the current needs without any necessity to replace any devices.
  • Allow the possibility to abandon the installation of aeration – air release valves in the pressing pipeline.
  • Enable safe and hygienic operation by placing technological part in the dry chamber.
  • Do not need to dose chemical substances that eliminate waste purification.

Used in EPP pneumatic lift station innovative SZUSTER system ball check valves, instead of gate valves with pneumatic drive enables a significant increase of operation cycles and the associated viability of the whole system. It also causes limiting of space required for installation of the device and the related lower investment costs.

Operating principle of EPP pneumatic lift station

The EPP pneumatic lift station constitutes a complete and fully automated installation. The operating principle of the EPP pneumatic lift station consists in a cyclical and alternate occurrence of two operating phases of the lift station: the filling phase and the pumping phase. In the filling phase, sewage flows to the vertical external pipe retention chamber; from there, it flows through the inflow well to the working chambers through open inlet valves. The outlet valve is open so that air could be released from the working chambers, while all the other valves remain closed. Once the working chambers have been filled with sewage, waste continues to accumulate in the inflow well and in the pipe retention chamber. Once the adequate level of sewage has been reached in the pipe retention chamber, the sewage pumping phase is switched on, which continues until the switching off level has been reached.

The pumping phase starts with the outlet valves being closed. The inlet elbow valve is closed under the influence of control air supplied to the working chamber by opening of the control valve. Once the inlet valve is closed, the working air valve is open, through which compressed air is pumped, as a result of which the elbow check valve is open that is located on the outlet from the working chambers, while sewage is forced out with compressed air from the working chamber and is forced into the pressure conduit. Pumping of sewage continues until the time set has elapsed or an adequate level in the working chamber has been reached. Then, the outlet valve is open and air that is inside the working chamber is decompressed in the suppressor, after which the biofilter is located.

After the completion of the compression phase, the system enters the filling phase. These cycles are repeated, and air is alternately forced into the working chambers until the level of sewage in the retention chamber has reached the minimum.


One of the chief advantages of the EPP pneumatic lift station is the function of periodical (e.g. at night) entire emptying of the pressure conduit from sewage using compressed air. In this manner, excessive putrefying of sewage in the pressure conduit is prevented, and odors that are hazardous to human life in the release wells are eliminated.

Range of parameters

Type Maximum
Minimal diameter
of pressing pipeline
Minimum numbers
of compressors
of working tanks
Minimul retention
EPP [US bbl/h] [inch] [psc.] [psc.] [lUS gal]
01 67 3 1/4″ 1 1 92
02 134 3 1/4″ 1 2 92
03 235 3 1/4″ 1 2 92
04 335 3 15/16″ 1 2 145
05 587 5″ 2 2 112
06 839 6″ 2 2 162
07 1174 6″ 2 2 162
08 1677 7 7/8″ 2 2 291

* Minimum retention capacity may be decreased when the inflow is less then maximum or/and the number of compressors will be reduced

Examples of use

Stawno, commune Złocieniec, West Pomeranian region, Poland

The working principle of EPP pneumatic lift station