Dishwasher Leaving Water in the Sump and Smelling, Drain Valve Sticking or Not Sealing With No Way to Prove It? NL-DDV-6 Dishwasher Drain Valve Sealing & Displacement Bench Runs Six Stations (dishwasher test equipment)

Water left in the sump, odours, slow draining, or a drain valve sticking and not closing tightly enough to leak, are a common and hard-to-trace class of dishwasher service problem. The cause is usually worn sealing faces, sticking or contaminated valve cores, fatigued springs, and displacement decaying over time. Incoming inspection that stops at appearance and manual on-off checks simply cannot see any of it, and the problem surfaces only once the machine is in use.

What the NL-DDV-6 dishwasher drain valve sealing and displacement bench measures

• Six stations in parallel, drain-valve seal hold-pressure testing: holding at a set pressure while pressure decay and leak rate are quantified, with micro-leaks localised to the seat (sharing the constant-pressure supply and pressure-metering module of our dishwasher test equipment)
• Displacement and flow-characteristic testing: drain flow and displacement measured point by point at a given head, with decay trends output automatically
• Open-close cycling endurance: tens of thousands of actuations on a set rhythm, with sticking, actuation-force change and seal decay filed against cycle count
• Reliability assessed under simulated valve-core contamination (debris / detergent residue)
• Spring and return-force testing to reproduce failure modes such as incomplete closing and sluggish return
• Barcode and batch binding, with raw data exported per unit for incoming-lot comparison

Applicable standards

GB 4706.1 (household appliances – general safety), GB 4706.25 (dishwashers – safety), IEC 60335-2-5 (dishwashers – safety), IEC 60436 (electric dishwashers for household use – methods for measuring the performance) and GB/T 20290; criteria can follow the customer's standard and the machine’s displacement requirement.

Stations and throughput

Six stations in a 24/7 design bring the days an operator would spend hooking up water and watching valve cycles down to minutes per unit, while sealing and cycling endurance are completed within weeks — so both incoming lots and end-of-line machines can be sampled batch by batch, stopping standing water, odours and leaks before shipment.

Manufacturer

Guangdong Endurance Electronic Equipment Co., Ltd. — a non-standard testing equipment manufacturer of dishwasher drain valve sealing and displacement 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.