Leak Test Benches

by Poppe + Potthoff


Leak Test and Flow Test Benches

Tightness | Leak Testing | Flow Testing with optional Climate Chambers and cooled / heated Test Media

In order to ensure that castings, valves, pumps, hoses and other components or pressure vessels have been manufactured free of leakage, they are tested in non-destructive leakage tests. Oxygen, water, air, nitrogen and sulfur hexafluoride (SF6) are some examples of possible media that can be used as the medium. Leak testing is a crucial way point during production to ensure component quality and product validation.

At Poppe + Potthoff we offer advanced Leak and Flow test benches for Automotive, Industrial, Medical and the Packaging Industry. Utilize our know how in sealing versatile and reliable leak testing equipment to gain data on your components. Due to our flexible modular design, our machines are very variable, so that the pressure and volume range is designed according to the customer’s requirements. Of course, our systems are UL or CE compliant as required. In addition, we offer you service and support directly on-site.

Universal leak test stand

SF6 leakage test systems


Plastic components

Combined leakage test
Depending on the requirements, the system can be equipped with either a vacuum unit or a low-pressure or high-pressure module. In multi-chamber testing systems, these can also be combined. Test procedures and measurement data are recorded, visualized and documented in software-based systems.


  • Testing of automotive components, e.g. for the drive, cooling and braking systems
  • Quality assurance for pumps, valves and hoses for hydraulics, pneumatics and medical technology
  • Sealing tests on products for gas and water treatment as well as the domestic appliance industry

Service provision
In general, we also offer leak tests in various printing areas as a service. Whether for research and development or serial applications, please contact us with your test requirements for a non-binding offer.

For various leak tests stands, click on the following application areas:

With the Poppe + Potthoff universal leak testers, various components and assemblies can be tested for tightness. Depending on the test requirement, this system is designed with a vacuum unit, low-pressure or high-pressure module for leakage and leakage testing.

The test pressure is generated using a pressure pump, a fine-control method, and a pneumatic or hydraulic pressure convertor. On the PC, All measurement data is recorded, visualized and documented in the test-stand software. Various test programs can be managed and freely programmed.

The low-pressure systems from Poppe + Potthoff Maschinenbau are specially developed for low-pressure, vacuum, air, or nitrogen tests.

Performance data:
These test systems enable the combination of a wide range of testing processes in a single device such as:

  • Pressure booster for additional supply
  • Temperature-controlled head-cooling
  • Easy access to pressure booster

With this test stand, tightness tests can be carried out on rails: the pressure is generated by means of a pressure convertor. SF6 is contained in the high-pressure medium and the smallest leakage is determined in the vacuum chamber by means of a suitable laser sensor.

The clamping device is located in the test chamber. It is adjustable and can therefore be used for almost every type of rail. Adaptation of the rails is carried out by means of high-pressure hoses and couplings by hand. The clamping and testing are carried out automatically.

The control is controlled by a Siemens PLC. A touch panel is used as input and display unit. It can also be operated via a keyboard. All relevant measurement results are visualized.

Performance data:

  • Test pressure up to 2,700 bar
  • Pressure holding time variable
  • Leak rate measurement
  • Various test points configurable
  • Automatic clamping of the components

Sequence for automatic operation:

  1. Place the test part
  2. Adapt
  3. Press Start
  4. Protective cover closes
  5. Clamping the rail
  6. Close the vacuum chambers
  7. Vacuum is generated
  8. Pressure build-up
  9. Pressure stabilization time and pressure holding time
  10. Concentration measurement
  11. Pressure reduction
  12. Medium is evacuated from the rail
  13. Hood opens
  14. i. O. part is labeled (n.i.O part does not get a label)
  15. Barcode of the pressure sensor is always read in
  16. Relax the rails
  17. Rail removal

With the Poppe + Potthoff leak test systems, automotive components, Valves, cast parts and many other components and assemblies can be tested for leak-tightness. Depending on the test requirement, this system is designed with a vacuum unit, low-pressure or high-pressure module for leakage and leakage testing.

The system allows pressure tests on a wide range of components up to a max. Pressure of 1,000 bar. The respective pressure points are approached with a pressure convertor and held for the programmed time. The system also allows impulse pressure to be applied to the test specimen. The tests can be performed as trapezoidal as well as sinusoidal curves.

Performance data:

  • Pressure generation: 10 to 1.000 bar, by means of a pressure convertor
  • Fine control: 0 to 50 bar
  • Pressure change test up to 1,000 bar
  • individual parameter settings
  • Data visualization using LabView

With the pressure pulsation test stand, pressure changes can be realized in the overpressure-overpressure, overpressure-vacuum, and vacuum-vacuum ranges

The pressure swing hysteresis is variably adjustable and can take place under a wide range of climatic conditions. Test temperatures of -72 ° C to + 180 ° C and a controllable humidity of up to 98% can be called up in the climate-control cabinet, which also serves as a test chamber. Three test connections are located on each side in the test chamber and can be shut off individually via separate valves. An automated leak test can detect leakage at every individual test piece every X cycles and exclude this from leakage from the test circuit.

The central point of the system is the centrally arranged climate control cabinet. The overpressure components, consisting of an adsorption dryer with compressed air storage tank and two overpressure storage tanks for the test print generation, are located in the left part of the system.

The vacuum components are installed in the right part of the plant. Vacuum pump, vacuum reservoir and two vacuum tanks. Also on the right is the operation of the system with a 19″ touchscreen, alternatively with keyboard and mouse.

Key Features:

  • High dynamics
  • Test pressure range -0.8 to +3.5 bar
  • Fully air-conditioned test chamber
  • Test temperatures: -72 ° C to + 180 ° C
  • Humidity adjustable up to 98%

Your request

Contact us

Johannes Montag


Frank Baudler


Philip Claussen


+49 3631 46221022


Philip Claussen

Poppe + Potthoff Maschinenbau America

+1 617 250 7668

For further testing solutions, click the following product areas:

Poppe + Potthoff Maschinenbau is part of the Poppe + Potthoff Group
18 locations in 9 countries.

Poppe + Potthoff Gruppe has 18 production plants and sales offices in 9 countries. The name Poppe + Potthoff always indicates the highest quality – a promise to which our customers rely on, regardless of which Poppe + Potthoff location they work in.

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