RTCA DO-160G Spray Proof Test Nozzle

RTCA DO-160G Section 10 Cat R, Spray Proof Test, Fig 10.2. Shower Head Nozzle
RTCA DO-160G 

The RTCA DO-160G Spray Proof Test Nozzle is used to perform the spray proof waterproofness test on airborne equipment as specified in RTCA DO-160G Section 10 Category R. The nozzle produces a controlled water spray pattern that simulates exposure to rain or cleaning processes, allowing evaluation of equipment sealing and moisture protection performance.

This DO-160G Shower Head Nozzle is an essential component for aerospace testing laboratories and equipment manufacturers. It helps verify that avionics, sensors, and other airborne devices can maintain functionality and safety when exposed to water spray conditions during flight or ground operations.

Technical Parameters

Professional Construction & Technical Precision

The RTCA DO-160G Spray Proof Test Nozzle is precision-manufactured from high-quality copper, offering excellent corrosion resistance and long-term durability in testing environments. The nozzle features accurately drilled spray holes — four with a diameter of Φ1.6 mm and four with a diameter of Φ2.31 mm — to ensure a consistent and repeatable spray pattern as required by RTCA DO-160G Section 10 Category R.

The nozzle is equipped with a standard DN 20 (G3/4″) thread connection, allowing easy and secure integration into various test setups. Its robust copper construction and precise hole geometry help maintain stable spray performance over repeated use, supporting reliable waterproofness testing of airborne equipment.

Testing Principle

The RTCA DO-160G Spray Proof Test Nozzle is designed to produce a controlled water spray pattern as specified in RTCA DO-160G Section 10 Category R, Figure 10.2. The nozzle directs water through its precisely arranged holes (4 × Φ1.6 mm and 4 × Φ2.31 mm) onto the equipment under test for a defined duration, while the equipment may be operating or non-operating.

This test evaluates whether water can ingress into the equipment and whether it continues to function correctly after exposure. It provides a standardized method to assess the waterproofness performance of avionics and other airborne equipment under simulated spray conditions encountered during flight or maintenance.

Common Error Mitigation

To obtain accurate and consistent test results, the following practices are recommended:

• Keep the nozzle holes clean and free from blockage or mineral deposits, as any obstruction can alter the spray pattern and affect test repeatability.
• Maintain the specified water pressure and flow rate to ensure the spray characteristics remain consistent with RTCA DO-160G Section 10 Category R requirements.
• Position the nozzle at the correct distance and angle relative to the equipment, as improper alignment may lead to uneven water exposure and unreliable results.
• Ensure the equipment under test is properly mounted and sealed before testing to accurately evaluate its waterproofness performance.
• Regularly inspect the copper nozzle for wear, deformation, or corrosion, especially after prolonged use, to maintain consistent spray performance.

Applications & Use Cases

The RTCA DO-160G Spray Proof Test Nozzle is used by aerospace equipment manufacturers, testing laboratories, certification bodies, aircraft manufacturers, and research institutions to perform spray proof waterproofness testing in accordance with RTCA DO-160G Section 10 Category R. It supports the evaluation of avionics, sensors, and other airborne electronic equipment for resistance to water spray exposure.

This nozzle helps manufacturers during product development and environmental qualification testing, enables laboratories to conduct standardized compliance testing, assists certification bodies in regulatory assessments, and supports research into moisture ingress behavior of aerospace systems. It contributes to ensuring the sealing performance and operational reliability of equipment used in aviation environments.