The pressure bursting and fatigue life testing machine for water purifiers is based on standards such as GB/T 4144-2019 "Household and Similar General-Purpose Pure Water Treatment Devices" and GB/T 30307-2013 "Household and Similar General-Purpose Drinking Water Treatment Devices". It is used to verify the pressure resistance, bursting limit, fatigue life, and sealing reliability of the entire machine, filter bottles, pipelines, and connectors.

Basic testing conditions (general)

- Ambient temperature: (23±2)℃

- Relative humidity: 45% to 75%

- Test medium: deionized water/clean tap water (free of impurities and bubbles)

- Medium temperature: (20±3)℃ (circulation) / 13～24℃ (bursting)

- Pressure accuracy: ±0.5% to ±1.5% FS

- Pressure rise rate: ≤0.4 MPa/s (bursting) / ≤0.05 MPa/s (cycling)

- Exhaust requirements: completely exhaust air (to avoid cavitation/pressure fluctuations)

Core test content (as per standards)

Static pressure and pressure resistance test (strength verification)

- Test pressure: 1.2~1.5 MPa (commonly used in national standards is 1.2 MPa/12 kg)

- Holding time: 15 minutes to 1 hour (national standard: 15 minutes)

- Judgment: No leakage, no permanent deformation, no cracks

- Measurement: pressure drop, radial/axial deformation

Water purifier burst pressure test (ultimate strength)

- Pressure rise method: uniform pressure rise (≤0.4 MPa/s)

- Target pressure: ≥2.5 MPa (25 kg), commonly used in national standards is 2.76 MPa (27.6 kg)

- Record: burst instant pressure, rupture location, failure mode (cracking/bursting/joint detachment)

- Judgment: burst pressure ≥ nominal/standard value

Pressure cycle fatigue test (life verification, the core)

- Cyclic waveform: square wave/triangle wave (0.1 MPa ↔ 0.8~1.0 MPa)

- Cycle frequency: 6 to 45 times/min

- Cycle count: ≥5000 to 100,000 cycles

- Interval: ≥30 s/time

- Judgment: no leakage, no deformation, no cracks, and flow attenuation ≤15% after cycling

Water hammer/impact pressure test

- Impact peak value: 2.0~3.0 MPa

- Impact duration: 1 to 5 seconds per impact

- Impact frequency: ≥1000 times

- Judgment: No cracking, no loosening, no sealing failure

Sealing performance test

- Test pressure: 1.0~1.2 MPa

- Pressure maintaining: 30 min

- Detection: Visual inspection/leak detection liquid/Helium mass spectrometry, leakage rate ≤0.1 mL/min

Temperature-pressure composite test

- Temperature: 40℃/55℃

- Pressure: 1.0 MPa

- Duration: 24 to 48 hours

- Judgment: No leakage or deformation under thermal expansion

Essential functions of water purifier testing machine

- Pressure source: high-pressure water pump/air-driven boosting system (adjustable from 0 to 20 MPa)

- Control: PLC/microcomputer automatic control, pressure/time/cycle parameter setting

- Acquisition: real-time pressure curve, temperature, flow rate, leakage rate

- Safety: explosion-proof cover, emergency pressure relief, overload protection

- Data: automatic recording, report generation, curve export