AIR
Compressed air
Dry or lubricated air, at low or high pressure as required, with preparation, filtration, regulation and dew-point monitoring where needed.
Air & gas
Pneumatic test benches
Apply pressure, measure leakage, characterise flow or repeat a cycle with a reliable and traceable result.
At a glance
The requirement comes before the machine.
SEM designs each pneumatic bench around the gas being used, upstream and downstream pressures, fill volumes, flow rates and the leakage level to be detected. Gas compressibility, temperature variations, stabilisation times and safety functions directly affect repeatability, so they are considered from the earliest circuit and measurement architecture.
Controlled pressure and flow
Leak method matched to the threshold
Vacuum, depression and pressurisation
Cycling and endurance
Acquisition and automatic criteria
Operator protection
Air, gas & vacuum
Gas, pressure and leakage must be engineered together.
A pneumatic result depends on more than a sensor. Internal volume, gas temperature, stabilisation time, humidity, connections and filling method can all change the measurement. SEM defines the circuit, instrumentation and test cycle as one system to deliver a repeatable inspection that operators can understand.
N2
Nitrogen
An inert gas for pressurisation, purging, cycling and leak testing where air is unsuitable for the product or process.
HEL
Helium and tracer gases
Low-leak detection and fault location using a measurement chain defined for the threshold, volume and required throughput.
VAC
Vacuum and depression
Leak testing, vacuum hold, evacuation or simulation of negative-pressure operation, including measurement of time and achieved levels.
TEC
CO₂ and technical gases
Functional or process testing with technical gases after reviewing component compatibility, exhaust arrangements and the operating environment.
SPC
Special gases
Case-by-case assessment of pure gases, mixtures and gases with specific safety, ventilation or contamination constraints.
Applications
Use cases, not a fixed catalogue.
Each bench is defined for the product and test conditions. These examples show the types of requirement we can assess.
01
Pneumatic cylinders
Measure travel, speed, force, chamber pressures, leakage and performance over repeated cycles.
02
Pressure reducers and regulators
Characterise downstream pressure, stability, hysteresis, flow and behaviour as upstream pressure changes.
03
Solenoid valves
Check response time, flow, seat leakage, switching positions and endurance.
04
Fittings and hoses
Carry out proof, leak and pressure-cycle tests using interfaces representative of the final installation.
05
Sealed assemblies
Detect pressure loss or leakage flow and automatically apply a traceable acceptance criterion.
06
Process equipment
Reproduce multi-pressure sequences, control several devices and record useful states, alarms and variables.
Our method
A clear and verifiable process.
- 01
Characterise gas and pressures
Gas type and quality, supply pressure, test ranges, temperature, humidity and safety constraints.
- 02
Define volumes and cycle rates
Product and circuit volume, throughput, filling, stabilisation and exhaust times, plus the required number of cycles.
- 03
Select measurement methods
Pressure, flow or leakage to measure, acceptance threshold, accuracy, resolution and required compensation method.
- 04
Design the circuit and protection
Pressure reduction, regulation, buffer vessels, valves, relief devices, exhaust, guarding and safe fault response.
- 05
Develop the test cycle
Guided or automatic sequences, prerequisite checks, acquisition, alarms, pass/fail decision and results logging.
- 06
Accept using representative parts
Set-up with compliant and non-compliant parts, repeatability checks and factory acceptance testing.
Next step