Dishwasher Not Cleaning After a Year or Two, Spray Arm Won’t Turn? NL-SPA-8 Spray Arm Rotation Endurance Bench Runs Eight Stations (dishwasher test equipment)

A dishwasher that no longer cleans well after a year or two is one of the most common user complaints. When the machine is torn down, the spray arm is often found to have slowed down or jammed: bearing wear, scale build-up and blocked nozzles all raise rotation torque, spray pressure decays with them and rinse coverage drops. Yet almost nobody measures spray-arm speed, torque or spray pressure before assembly — the deviation is left for the end user to find.

What the NL-SPA-8 spray arm rotation endurance bench measures

• Eight stations in parallel, with the arm rotating continuously on a live water circuit while speed and rotation consistency are logged
• Rotation torque and start-up torque measurement, with bearing wear and jamming trend filed against cumulative revolutions
• Spray pressure and flow monitoring (sharing the water-circuit metering module used on our pump test bench systems), with pressure-decay judgement
• Blocked-nozzle, wobble and run-out detection, flagging insufficient coverage automatically
• Hot and cold water switching to reproduce rotation behaviour at real wash temperatures
• Revolution count and failure point recorded, with one-click report export for incoming comparison

Applicable standards

GB 4706.1 (household appliances – general safety), IEC 60335-2-5 (dishwashers – safety), IEC 60436 (electric dishwashers for household use – methods for measuring performance) and GB/T 20290; acceptance criteria can follow the customer's standard.

Stations and throughput

Eight stations in parallel, designed for 24/7 running, so the tens of thousands to hundreds of thousands of revolutions no operator can complete by hand are finished in a few days, allowing batch sampling or 100% inspection.

Manufacturer

Guangdong Endurance Electronic Equipment Co., Ltd. — a non-standard testing equipment manufacturer of spray arm rotation endurance 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.