Differential Pressure Leak Testing System

 This machine can be designed with combination of leak testing methods according to the customer’s actual
conditions, for example, combine positive pressure leak testing by air differential pressure and leak testing
by negative pressure vacuum differential pressure, to effectively avoid un-detection due to single way
leakage of product.

Vacuum Decay Differential Pressure Leak Testing

After the test object is pressurized with air and closed, compare the pressure drop with simulated leak work.

Machine Theory

Vacuum Decay Machine Performance Parameters

Machine Parameters
ModelVPL-100
Testing MethodVacuum Decay (-100 ~ 0 Kpa)
Ambient Temperature5~40°C
Humidity≤80%RH
ElectricityAC380v± 10% 50Hz
Gas Source≥0.5MPa
Sensor Precision0.02%FS
Pressure UnitKPa,Pa,PSI
Differential Pressure UnitPa
Measuring Range of Differential Pressure Sensor0~100/200/300/400/500/1000/5000/10000/50000Pa
Pressure-resistance Capability of Sensor13.8MPa
Leak Rate Output UnitSCCM、 Pa·m3/s、 mbar·l/s、 ml/min
Leak Rate Display Precision1E-4Pa·m3/s
Control + DisplayCPU+5.4” Color Touch Screen

Application Product

Fully enclosed product without charging port.
Differential pressure-resistance capability of product ≥ 5,000 Pa

Positive Pressure Air Differential Pressure Leak Testing

Machine Theory

Process Flow

Application Product

Fully enclosed product with charging port and can charge dry compressed gas by corresponding pressure according to requirement of the product.

Nagative Pressure Air Differential Pressure Leak Testing

Machine Theory

Process Flow

Application Product

Fully enclosed product with charging port and can charge dry compressed gas by corresponding pressure according to requirement of the product.