Leak test benches with water, glycol, SF6, oil and gas up to 3000 bar. In order to ensure that components are manufactured without leaks, they are exposed to proof tests to identify leaks and weak spots.
Leak Test Stands
With Fluids and gas
To make sure that cast parts, tubes, hoses, assemblies, and various other pressure vessels are manufactured non-leaking, they are tested with a non-destructive (hydrostatic) leak test. For example, oils, water, glycol, air, nitrogen, or sulfur hexafluoride (SF6) are typical test media for leak testing.
A leak is usually an unintended hole or crack in a component. Hence resulting in a pressure drop from high to low. Thus, when an internal component or pressure vessel is above normal atmospheric pressure it is said to be in a state of positive pressure. Consequentially, if a seal or crack bridges the sealed positive pressure area with a lower pressure region, the positive pressure will escape to a lower pressure. Therefore, the location of escaping pressure is the spot of the leak.
Depending on the requirement, our leak test rig can be equipped with a vacuum unit or a low- or high-pressure module. Our state-of-the-art test rigs are designed with a modular system. Thus, we utilize previously designed modules and fit them to your exact requirements. With that our rigs achieve reliable and repeatable test results. The Poppe + Potthoff leak test stands can be manufactured as multi-chamber test systems. In addition, the rigs can be connected to a climate chamber. Further, they can be equipped with media heating and cooling. Test procedures and measurement data are logged, visualized, and documented via LabView. Our systems are UL or CE compliant as required.
Multi-Purpose Leak Test Rig up to 3000 bar
Depending on the requirements the rig will be equipped with a pressure pump, our patented fine-control method, and a pneumatic or a hydraulic pressure intensifier to generate pressure. A PC allows programable pressure curves and test setups and extensive data acquisition, and visualization for optimal analysis. The rig allows various test setups tailored to customers’ test specifications.
SF6 Leak Test Stand
The SF6 leak test rig allows tightness tests on common rails and other components. The pressure is generated through a pressure convertor, while the SF6 is contained in the high-pressure medium. A leakage is determined in the vacuum chamber with a laser sensor. For efficiency, a clamping device is located in the test chamber. It is adjustable and can be used for almost every type of common rail. Adaptation of the rails is enabled through high-pressure hoses and couplings. The control unit is a Siemens PLC and involves a touch panel as an input and display unit.
Leak test rig for Fittings
With the Poppe + Potthoff leak test systems valves, cast parts and many other (automotive) components and assemblies can be tested for leakage. The system allows pressure (drop) tests on a wide range of components up to a pmax. pressure of 1 000 bar. The pressure points are approached with a pressure intensifier and allow flexible pressure ramps and pre-programmed holding times. This unique system allows impulse pressure to be applied to the test DUT and allows trapezoidal (square) as well as sinusoidal (wave) curves.
Overpressure-vacuum test stand
The pressure leak test stand allows testing in various pressure ranges and is unique with its functionality of underpressure functionality. The leak test rig can achieve overpressure-overpressure, overpressure-vacuum, and vacuum-vacuum pressure ranges. The pressure 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 reached in a climate chamber. Three (or more) test connections are located on each side of the test chamber and can be shut off individually via separate valves. A leak test is detected at every DUT and excludes it from leakage from the test circuit.
Leak test bench <1050 bar with gas (helium)
The leak test stand is suitable for gas pressure tests up to 1050 bar. Tests can be performed with 95/5 moulder gas/H2, helium or nitrogen. Standard 50L gas cylinders or other sources serve as the media source. A leak is detected and registered by a sniffer (e.g. Inficon P3000XL).
The leak test stand is equipped with a special safety concept to protect the operator. New and never before components and prototypes are tested with water in a safety chamber for their bursting pressure (e.g. up to 3000 bar) to understand the component’s behaviour.
A safety box is installed in the climate chamber for testing with gas, which protects against potential component splinters. In addition, various flexible hoses are attached to the box and are equipped with nozzles to detect leakage at several points around the component. Consequentially, the hoses are connected to outlets outside the climate chamber. At the outlets, the operator can use the sniffer to identify the leak. For an underwater test, the safety box is removed or the door of the box is hung out. Frequently tested components in this system are H2 Ontank Valves.
Test as a Service
We offer several pressure tests in various pressure ranges as a test service. Whether for research and development or serial production, please contact us with your testing requirements for a non-binding offer.
PRESSURE TEST BENCHES AND APPLICATIONS
PRECISE, REPEATABLE AND RELIABLE
As a specialist in pressure testing technology and state-of-the-art test rigs, Poppe + Potthoff Maschinenbau supports the development and production of particularly resilient components made of various materials – especially for automotive, shipbuilding and mechanical engineering as well as fluid and the medical industry. We offer individually designed test benches such as burst pressure test rigs, pressure cycle test benches, leak test systems, functional test rigs and autofrettage systems.
Pressure change test stand with vacuum testing
Subject cooling systems of ECUs, PTC heaters, high-voltage coolant auxiliary heaters, ACDC and DCDC converters, and other media-carrying components to pressure tests while controlling the ambient and media temperature of, for example, water-glycol at temperatures from -40 °C to 140 °C.
Function test stand: battery simulation under the influence of temperature
For functional testing of media-carrying components, a temperature-controlled volume flow (e.g. 30l/min) can be generated with the Poppe + Potthoff test benches. In addition, a component from e-mobility can be energized if required.
Leakage test stand
Poppe + Potthoff leak test stands can be used to test various components and assemblies for leaks by means of a pressure drop. Depending on the test requirement, our systems can be designed including vacuum unit and low pressure or high pressure module for optimal leak testing. In addition, Poppe + Potthoff offers e.g. bubble tests in a water bath / underwater tests with air and gas.
Compressed air booster
Poppe + Potthoff Maschinenbau GmbH supplies compressor units and pressure control systems up to 400 bar. We offer ready-to-connect units to increase the existing pressure for pneumatic and hydraulic applications. This allows the performance of already existing plants to be expanded flexibly and efficiently.
1050 Bar Helium / Nitrogen / Hydrogen
A leak test bench equipped with a pressure module up to 1050 bar, an optional integrated climate chamber and a gas sniffer (e.g. Inficon) to detect leakage on H2 components such as ontank valves, hoses, pipes, fittings, regulators, valves and fuel cell components.
Household appliance manufacturers are aware of the importance of ensuring that their media-carrying components are leak-proof from day one and that components can withstand a pressure load higher than the operating pressure. Poppe + Potthoff Maschinenbau supports the industry with various pressure testing systems.
BOOK AN INDIVIDUAL CONSULTATION
WITH A DEDICATED SALES ENGINEER
Our experienced technical sales team will help you with the implementation of your project and will find a solution tailored to your specifications and your requirements. We are represented internationally and can support you and your company worldwide. Our team has completed hundreds of projects many of which involved supporting test facilities with identical equipment. P+P Maschinenbau is your internationally trusted partner.
Expertise, excellent knowledge of the market and affinity for our products guarantee our success.