Steam Oven Producing Less Steam After a Year, Scale Found Only When Opened Up? NL-STG-6 Steam Oven Steam Generator Scaling and Steam-Output Decay Bench Runs Six Stations (pump test bench)

Steam ovens that produce less steam after a year, leaving food undercooked and heating slowly, turn out to have a layer of scale inside the steam generator; or a blocked generator overheats the heating element and destroys it prematurely. This is one of the harder classes of service problem to reproduce. The cause is usually water hardness, generator channel geometry, and the scaling rate under long-term high-temperature cycling. Incoming checks usually only confirm the cold-water path is open, with no scaling simulation and no steam-output decay testing, so the problem takes months to appear once the machine is in use.

What the NL-STG-6 steam oven steam generator scaling and steam-output decay bench measures

• Six stations in parallel, steam output and steam-rate testing: output and response time measured point by point at a given power and feed-water condition, with decay trends output automatically (sharing the constant-flow water supply and pressure-metering module of our pump test bench)
• Scaling simulation cycling: long-term circulation of test water at a set hardness, tracking steam-output decay and rising generator pressure drop to quantify differences in anti-scaling design
• Generator pressure-drop and flow testing, with blockage-warning curves generated automatically
• Heating power, temperature rise and overheat-protection testing, reproducing both local overheating and no-protection failures
• Multi-point steam temperature and uniformity testing to assess cooking consistency
• Barcode and batch binding, with raw data exported per unit for the record

Applicable standards

GB 4706.1 (household appliances – general safety), GB 4706.22 (stationary cooking ranges, hobs, ovens and similar appliances – safety), IEC 60335-2-6 and GB/T 2828 sampling; test-water hardness can be prepared to GB/T 5750, and criteria can follow the customer’s standard and the machine’s requirements.

Stations and throughput

Six stations running 24/7 compress the months an operator would spend boiling water and logging steam output week by week into a few weeks, with steam-output decay and scaling trends rechecked cycle by cycle — so incoming lots and end-of-line machines can both be sampled batch by batch, stopping undercooked food and blocked generators before shipment.

Manufacturer

Guangdong Endurance Electronic Equipment Co., Ltd. — a non-standard testing equipment manufacturer of steam oven steam generator scaling and steam-output decay 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.