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Evac N°10 HQE Vacuum collection unit

With the Evac N°10 HQE vacuum collection unit, sewage is intercepted by the vacuum tank and does not pass through the vacuum pumps. This protects the pumps from clogging or damage by foreign objects resulting from vandalism or misuse of the vacuum toilets. The unit is composed of a 1,000-liter galvanized collection tank, two rotary-claw vacuum pumps (available with various flow rates), one or two discharge pumps, a control panel, connections for PVC (PN16) network pipes, and two inlet connections for the incoming flow.


  • Competitively priced
  • Compact design
  • Large range of capacities and configurations
  • No water consumption
  • Low power consumption compared to liquid-ring pump systems

Evac HQE retrofit skid

We also offer the Evac HQE retrofit skid to upgrade existing vacuum collection units with dry vacuum pump technology and optimized automation. The retrofit offers various options: air filter level switches, two-part skid configuration, and a GTC (RJ45 connection).

Evac N°10 HQE
Models6536461 Evac HQE 60 R1
6536462 Evac HQE 105 R1
6536463 Evac HQE 105 R2
6536464 Evac HQE 140 R2
6501399 Evac N°10 HQE 60 R1
6500393 Evac N°10 HQE 105 R1
6500390 Evac N°10 HQE 140 R2
6500386 Evac N°10 HQE 60 R2
6501539 Evac N°10 HQE 105 R2
MaterialsVacuump pump, pump casing: cast iron, PTEF coated inside
Frame and tank: epoxy coated or stainless steel
Operating dataVacuum pump total capacity: 108 - 252 m3/h/63-148 CFM depending on the model
Discharge pump: 20m/DN50
Rotary claw vacuum pump technology
Tank capacity: 1000L/ 264 gal

Available in Europe, Russia, Middle East and Asia markets
Nominal power5.6 - 14 KW total depending on the model
WeightDry: 1050 - 1130 kg / 2315 - 2492 Lbs depending on the model


Operating principle of Evac N°10 HQE

The vacuum pumps are connected to the collection tank and then the pipe network. These pumps maintain a constant level of vacuum in the system. The electronic vacuum measurement system regulates the starting and stopping of the pumps. The collection tank collects wastewater from the pipe network (branch and main) through two DN65 inlets located in the upper left part of the tank.

When the vacuum pumps are running, vacuum is created throughout the system. When needed, the vacuum pumps stop and the discharge pump is activated to discharge the tank to the sewage system through the DN50 PVC pipe. The entire system can be managed from a single PLC control panel. All Evac vacuum collection units are equipped with fault diagnostic systems and volt-free connections for BMS.

During normal operation, air and sewage enter the collection tank from the toilets and vacuum interface valves. As the operating vacuum decreases, the vacuum sensor starts the lead vacuum pump. The vacuum pumps maintain the vacuum for the operation of the toilets and interface valves.

As sewage is collected, the vacuum decreases to 14 inHg, which starts the lead vacuum pump. The lead pump restores the vacuum to 18 inHg. The lead and lag pump alternate for each operating cycle.

During peak loading conditions, the lag vacuum pump will cut in if the vacuum drops to 12 inHg. If the vacuum continues to remain below 12 inHg for 10 minutes or more, the low vacuum alarm will come on.

Each vacuum pump runs for 10 minutes once there is a demand for vacuum. The vacuum pump isolation valve automatically opens and closes to regulate the vacuum in the tank during operation. Each collection tank contains three level sensors, positioned to notify system operators when the tank is at low level (30%), high level (75%), and block level (80%).

It is recommended to discharge the sewage before the tank reaches high level. When block level is reached, the system will stop running and sewage must be discharged before normal operation can resume.