Executive standards: QB/T 4697-2014 (special pressure pump), QB/T 4144-2010 (reverse osmosis water purifier)

1. Basic operating condition durability (core lifespan)

1. Start-stop cycle life (under standard operating conditions)

- Cycle: Operate for 10 seconds → Stop for 5 seconds, accumulating ≥100,000 cycles

- Load: Outlet pressure 0.42±0.042 MPa, inlet pressure 0.1 MPa

- Judgment: No jamming, leakage, abnormal noise, or performance degradation

2. Continuous and durable operation

- Continuous operation for ≥2000 hours under rated voltage and rated pressure

- High and low voltage limits: 110% rated voltage for 24 hours continuously; 90% rated voltage in cycles (7.5 minutes on/2.5 minutes off)

II. Electrical performance monitoring (full-process acquisition)

- Operating current, voltage, power, insulation resistance, temperature rise

- Judgment: Current fluctuation ≤±10%; no short circuit, overheating, or insulation failure

III. Hydraulic performance attenuation test

- Real-time monitoring: flow rate, head (outlet pressure), rotational speed

- Comparison: performance degradation rate before and after testing (requirement: ≤5%)

IV. Sealing and mechanical reliability

- Leak detection: No leakage/dripping from the shell, shaft seal, or joints

- Mechanical strength: vibration, water hammer impact, shell pressure resistance