Water Purifier Joints Weeping Once Plumbed In, Hoses Bursting Under a Surge? NL-WHP-4 Whole-Machine Water Hammer Pulse & Line Pressure Bench Runs Four Stations (pump performance test)

Joints weeping once the purifier is plumbed in, or inlet hoses bursting under a pressure surge, are among the costliest complaints a maker can face. The cause is usually insufficient quick-connector locking, or a hose and seal without enough pressure margin, which fatigues progressively under the water hammer produced by fast valve action until it leaks — or bursts — in the customer’s home. Incoming inspection usually checks components individually, so the whole-machine pressure margin and sealing reliability under real water hammer cannot be seen.

What the NL-WHP-4 whole-machine water hammer pulse and line pressure bench measures

• Four stations in parallel, with the whole machine (or a full water section) on a constant-pressure supply and fast valve action generating water-hammer surges, while peak pressure and pressure waveform are logged throughout (sharing the variable-frequency constant-pressure supply and pressure-acquisition module of our pump performance test benches)
• Whole-machine hold-pressure and over-pressure testing, with pressure decay and leak rate quantified and automatic stop-and-protect on failure
• Water-hammer pulse-cycle endurance, with peak pressure and cycle count filed and fatigue trends output automatically
• Micro-leak localisation at connectors, hoses, valves and filter housings, quantifying leaks invisible to the eye
• Temperature cycling to reproduce pressure-margin decay under hot-water conditions
• Barcode and batch binding, with raw data exported per unit for the record

Applicable standards

GB/T 30307 (household and similar drinking water treatment units), GB 4706.1 (household appliances – general safety), GB 34914 (water efficiency of water purifiers) and the customer's standard; water-hammer peak and hold criteria are set as multiples of the machine’s working pressure.

Stations and throughput

Four stations running 24/7 bring tens of minutes of manual pressure testing down to about ten minutes per unit, while water-hammer pulse fatigue is completed within weeks — so both incoming lots and end-of-line machines can be sampled batch by batch.

Manufacturer

Guangdong Endurance Electronic Equipment Co., Ltd. — a non-standard testing equipment manufacturer of whole-machine water hammer pulse and line pressure test benches, pump test bench and pump performance test systems, level sensor life test machines, dishwasher test equipment and washing machine test equipment.

Keywords: pump test bench, pump performance test, level sensor life test, dishwasher test equipment, washing machine test equipment.