Fatal mistakes in IPX9K waterproof test: nozzle size and water temperature control, the truth you must know

Fatal mistakes in IPX9K waterproof test: nozzle size and water temperature control, the truth you must know

In today's era of pursuing high quality and high standards, IPX9K waterproof testing has become a key link in the production of electrical and electronic equipment. However, there are some extremely bad phenomena in the industry - some companies, in order to reduce costs and seek temporary convenience, actually use nozzles that do not meet the requirements of the IEC 60529 standard for testing. This behavior is not only a blasphemy to their own profession, but also a great disrespect for product quality and consumer rights. It is simply playing with the safety and reliability of the product! This behavior must be severely condemned, and such chaos in the industry needs to be rectified urgently!

1. Size requirements for IPX9K nozzles

According to the IEC 60529 standard, the size and design of the IPX9K waterproof test nozzle have strict specifications, which ensure the accuracy and reliability of the test. The following are the key size requirements:

1. Nozzle diameter

• Standard requirements: The nozzle diameter must meet the standard drawing requirements, which is the key parameter to ensure that the flow rate and pressure of the water flow meet the test requirements.

• Calibration requirements: The dimensions of all printheads must be calibrated by a third party to ensure that they meet standard requirements.

2. Nozzle size details

According to Figure 7–Fan jet nozzle dimension and Figure 8–Fan jet nozzle resulting dimensions of spraying hole for checking purpose in the IEC 60529 standard, the specific size requirements of the nozzle are as follows:

• Nozzle radius:

• R0.75±0.01 mm

• R1.5±0.005 mm

• Other nozzle sizes:

• 8±0.01 mm

• 9.69±0.01 mm

• Nozzle diameter:

• 3±0.01 mm

• 2.34±0.06 mm

• Total nozzle length:

• 13.33±0.04 mm

The deviation of each size may lead to a huge difference in the test results, thus affecting the accurate evaluation of the product's waterproof performance. Those companies that use unqualified nozzles completely disregard the accuracy and reliability of the test results. This behavior is a great harm to the entire industry and a naked infringement of consumer rights.

3. Nozzle surface quality

According to Figure 9 in the IEC 60529 standard – Example of different quality achievements of the surface finish of the fan jet nozzle, the surface quality requirements of the nozzle are as follows:

Dimensions of spraying hole for checking purpose, the specific size requirements of the nozzle are as follows:

IPX9K-Nozzle according to IEC60529

Figure 7 – Fan jet nozzle dimensions

Figure 8 – Fan jet nozzle resulting dimensions of spraying hole for checking

Figure 9 – Example of different quality achievements of the surface finish of the fan jet nozzle

Bad surface finish

Good surface finish

Industry often misuses:

KINGPO complies with standard sprinkler heads:

• Smooth surface: The nozzle mouth needs to be smooth and free of burrs.

• Material: The nozzle should be made of high-quality stainless steel to ensure its durability under high temperature and pressure conditions.

The smoothness of the nozzle surface and the choice of material also have an important impact on the test results. A smooth surface without burrs can ensure the uniform spraying of water, while high-quality stainless steel materials can ensure that the nozzle maintains stable performance in long-term high-temperature and high-pressure use without deformation or damage, which will affect the accuracy of the test. Those companies that use unqualified nozzles completely ignore these details. This behavior is extremely irresponsible for product quality and extremely disrespectful of consumer rights.

4. Nozzle angle and flow rate

• Spray Angle: The spray head is designed to achieve spray angles of 0°, 30°, 60° and 90° to ensure full range of testing of the equipment [^IEC 60529^].

• Flow and pressure:

• Flow rate: The water flow rate needs to be controlled at 14-16 liters/minute.

• Pressure: The water pressure of the nozzle needs to reach 8-10 MPa (80-100 bar).

The precise control of the spray angle and flow pressure simulates the impact of water on the equipment in different use environments. Only by meeting these standards can we truly reflect the waterproof challenges that the product may encounter in actual applications, thereby effectively testing the waterproof performance of the product. Those companies that use unqualified nozzles completely disregard these standards. This behavior is a great disrespect for the test results and a great irresponsibility for product quality.

2. Water temperature requirements for IPX9K test

According to the IEC 60529 standard, the water temperature requirements for the IPX9K test are as follows:

• Water temperature range: The temperature of the test water should be maintained at 80±5℃.

• Temperature stability: During the test, the water temperature should remain stable to ensure consistent test conditions.

The control of water temperature is also crucial to the test results. High-temperature water flow can simulate the use of equipment in extreme environments, such as the engine compartment waterproof performance test of a car driving in hot and rainy weather, or the reliability test of outdoor electronic equipment in a hot water splash environment. If the water temperature is not properly controlled and cannot reach or stabilize within the range required by the standard, the test results will not reflect the actual situation that the product may encounter in actual application, which will make the test meaningless and may even lead to misleading judgments on the long-term stability and reliability of the product.

3. Current status and hazards of industry misuse

Although the IEC 60529 standard has clear provisions on the size and water temperature requirements of IPX9K nozzles, in the industry, some companies, in order to save costs and pursue efficiency, actually use nozzles that do not meet the standard requirements, or are perfunctory in water temperature control. This behavior must be given enough attention and condemned.

1. Misuse of nozzle size

• Size does not meet the standard: In order to reduce costs, many companies use nozzles that do not meet the standard size. For example, the nozzle diameter may be only 5 mm or even smaller, or the nozzle radius does not meet the standard. These substandard nozzles cannot meet the requirements of the IEC 60529 standard at all, causing the test results to deviate seriously from reality, bringing huge errors to the evaluation of the product's waterproof performance [^IEC 60529^].

• Uncalibrated: Some companies knowingly use nozzles that have not been calibrated by a third party for testing. The size of these nozzles may become inaccurate due to errors in the production process or wear and tear after long-term use, but they turn a blind eye and continue to conduct the so-called "waterproof test". This behavior is simply a blatant provocation to the IEC 60529 standard, a disrespect for the entire industry, and a disregard for the safety of consumers' lives and property.

2. Wrong way to control water temperature

• Temperature loss: Some companies also have serious problems with water temperature control. They supply water directly from the hot water source to the sprinkler head without taking any measures to ensure the stability of the water temperature. This practice causes the water temperature to gradually decrease in the pipe and cannot meet the standard requirement of 80±5℃.

• Irregular testing: Some companies even start testing before the water temperature stabilizes, or ignore changes in water temperature during the test. This irresponsible behavior not only wastes testing resources, but also misleads the company's own assessment of product quality, burying a huge hidden danger for the product's future market performance.

These companies are willing to sacrifice product quality and safety for the sake of immediate profits. This behavior is a great violation of professional ethics, a great harm to consumer rights, and a great harm to the entire industry. They are not only deceiving consumers, but also deceiving themselves, which will eventually lead to a crisis of trust in the entire industry and damage the reputation of the entire industry.

4. Unique design and advantages of KINGPO nozzle

Amidst this industry chaos, KINGPO has always adhered to high standards and strict requirements. The nozzles it produces fully comply with the requirements of the IEC 60529 standard, and ensure the accuracy of the test through unique design, setting a benchmark for the standardized development of the industry.

1. Accurate size and design

the drawing requirements of IEC 60529 standard .

• Nozzle size:

• R0.75±0.01 mm

• R1.5±0.005 mm

• 8±0.01 mm

• 9.69±0.01 mm

• 3±0.01 mm

• 2.34±0.06 mm

• 13.33±0.04 mm

• Spray Angle: KINGPO nozzles can accurately achieve spray angles of 0°, 30°, 60° and 90°, ensuring all-round coverage of the equipment.

2. High-quality materials and durability

• Material: KINGPO nozzles are made of high-quality stainless steel to ensure durability under high temperature and pressure conditions.

• Surface quality: The surface of KINGPO nozzle is smooth and burr-free, meeting the requirements of IEC 60529 standard.

KINGPO not only strictly controls the dimensional accuracy of the nozzle, but also achieves perfection in material selection and surface treatment. The high-quality stainless steel material ensures the stability and durability of the nozzle in long-term use, while the smooth and burr-free surface ensures uniform water spray, thus ensuring the accuracy and reliability of the test results.

3. Water temperature control and circulation system

• Water temperature stability: The KINGPO equipment is designed with an additional circulation nozzle to circulate and heat and stabilize the water temperature before testing.

• PID diagnosis: The PID control system is used to accurately diagnose the water temperature, ensuring that the water temperature remains at 80±5℃ during the test.

• Circulation system: KINGPO equipment is equipped with an efficient water circulation system to ensure that the test water maintains a stable temperature in the pipeline to avoid temperature loss.

KINGPO is well aware of the importance of water temperature control to test results, so it uses advanced water temperature circulation and control systems in the design of the equipment. Through additional circulation nozzles and PID diagnostic technology, KINGPO equipment can ensure that the water temperature remains stable during the test, thereby ensuring the accuracy and reliability of the test results.

4. Calibration and certification

• Qualified third-party calibration: All KINGPO nozzle sizes are calibrated by a third party and come with a calibration report to ensure they comply with the IEC 60529 standard.

• Industry recognition: KINGPO sprinkler heads have been widely recognized by the industry for their strict compliance with IEC 60529 standards.

KINGPO not only strictly follows the IEC 60529 standard in product design and manufacturing, but also pays meticulous attention to product calibration and certification. All printheads are calibrated by a third party before leaving the factory, and are accompanied by a detailed calibration report to ensure that users can fully trust the quality and performance of the product during use.

V. Conclusion

In the IPX9K waterproof test, the technical requirements of the nozzle are extremely critical, and its size, design and performance must strictly comply with the IEC 60529 standard. At the same time, the control of water temperature is also a key factor in ensuring the accuracy of the test. Many industries have wrong practices in water temperature control, resulting in unreliable test results.

At present, the nozzles produced by KINGPO can fully meet the requirements of IEC 60529 standard. Its precise size, high-quality materials and unique water temperature control and circulation system make it the preferred product for IPX9K test [^KINGPO^]. Manufacturers and testing institutions should give priority to KINGPO nozzles to ensure the accuracy and reliability of test results, thereby improving the waterproof performance and market competitiveness of products.

Companies that use substandard nozzles and incorrect water temperature control are not only deceiving consumers, but also deceiving themselves. Such behavior will not only damage the reputation of the company, but also have a serious negative impact on the healthy development of the entire industry. We call on the entire industry to work together to resist such irresponsible behavior and safeguard the good reputation of the industry and the legitimate rights and interests of consumers.