Aviation Pressure Release Valve KJY-18

KJY-18 Aviation Pressure Release Valve:

Essential Protection for Critical Systems

The YM KJY-18 Aviation Pressure Release Valve is a precision-engineered safety component designed to protect sensitive aerospace and high-performance industrial systems from overpressure damage. This ultra-reliable, fast-acting valve is engineered for integration into drone propulsion systems, aircraft engine controls, and other applications where pressure regulation is critical to safety and performance. 

Technical Specifications

Designed to meet the exacting demands of aviation, the KJY-18's specifications ensure reliable operation in extreme conditions.

Electrical & Performance Parameters

• Coil Power Consumption: Low power operation at (0.3~0.43)W, ideal for power-sensitive avionics systems.
• Contact Load & Lifecycle: Rated for 1A at 28V DC resistive load, with a robust lifecycle of 1x10⁷ operations.
• Contact Resistance: Maintains low initial resistance (≤50mΩ) and stable performance throughout its service life.
• Time Parameters: Features an ultra-fast action time of ≤4ms and a release time of ≤4ms for immediate system response.
• Incentive Pulse Width: Operates effectively with a control pulse width of (10～50) ms.

Environmental & Safety Specifications

• Dielectric Strength: Withstands 500V_r.m.s. (50Hz) at normal atmospheric pressure and 250V_r.m.s. under low-pressure conditions.
• Insulation Resistance: Exceeds 500MΩ initially and remains above 50MΩ after high-level endurance testing.
• Sealing Integrity: Hermetically sealed with a maximum leakage rate of ≤1x10^-3 Pa·cm³/s, ensuring no fluid or gas escape.
• Weight: Extremely lightweight at <3 grams, minimizing impact on the overall system weight budget.

Product Features & Core Advantages

Built with the same commitment to reliability as our Military Metal Sealing Relay and Polarized Relay product lines, the KJY-18 offers distinct advantages for system designers.

Engineering Excellence for Critical Protection

• Ultra-Fast Pressure Relief: The ≤4ms response time provides near-instantaneous pressure release to prevent damage to expensive downstream components like sensors and actuators.
• High Reliability & Long Life: With a lifecycle of 10 million operations and stable contact resistance, it offers maintenance-free performance, similar to the durability found in our Latching Relays.
• Superior Sealing Technology: Advanced hermetic sealing ensures zero leakage (≤10^-3 Pa·cm³/s), critical for maintaining system pressure integrity and preventing contamination.
• Robust Construction: Designed to withstand the vibration, shock, and thermal cycles common in aviation and Automotive Relay applications.

How to Integrate the KJY-18 Valve: A Step-by-Step Guide

1. System Assessment: Identify the critical pressure point in your fuel, hydraulic, or pneumatic system that requires protection. Determine the set pressure and flow requirements.
2. Valve Selection & Mounting: Ensure the KJY-18's pressure rating and port size match your system. Securely mount the valve at the designated point, paying attention to the recommended flow direction.
3. Electrical Connection: Connect the valve coil to the control circuit. Its low power draw allows it to be driven directly by a PCB Signal Relay or a microcontroller output via a suitable driver.
4. Functional & Leak Test: Before full system integration, perform a controlled functional test to verify the actuation time and conduct a leak test to ensure sealing integrity.
5. System Calibration & Monitoring: Integrate the valve into the full control loop. Monitor its operation during system testing to confirm it activates at the desired pressure threshold without false triggers.

Application Scenarios

The KJY-18 is designed for mission-critical pressure management across advanced mobility and industrial platforms.

• Unmanned Aerial Vehicles (Drones): Protects fuel lines, lubrication systems, and hydraulic actuators in heavy-lift or long-endurance UAVs from pressure spikes.
• Aircraft Engine & APU Systems: Serves as a safety valve in auxiliary power unit (APU) enclosures, gearbox pressurization systems, or engine bleed air circuits.
• New Energy Vehicle Powertrains: Used in test benches and prototype systems for hydrogen fuel cell pressure regulation or high-voltage battery cooling loops.
• Industrial Automation: Provides reliable overpressure protection in precision pneumatic control systems and chemical processing equipment.

Value for Procurement Teams & System Integrators

Choosing YM's KJY-18 translates into tangible benefits for your projects and bottom line.

• Protect High-Value Assets: Prevents catastrophic failure of expensive engines, actuators, and sensors by providing reliable, fast overpressure protection, reducing downtime and repair costs.
• Enhance System Safety & Certification: Contributes to overall system safety, aiding in compliance with stringent aviation and industrial safety standards.
• Reduce Total Cost of Ownership: The exceptional lifecycle and hermetically sealed design minimize maintenance needs and the risk of in-service failures.
• Simplify Sourcing: Source this critical safety component from YM, a trusted manufacturer with proven expertise in high-reliability components like Industrial Power Relays and Solid State Relays.

Certifications, Compliance & Customization

Commitment to Quality Standards

YM's manufacturing processes adhere to rigorous quality management systems. Our components are designed to meet the performance and reliability requirements of international aviation and industrial directives. We support our partners with the necessary documentation and testing data to streamline their own certification processes.

Customization Options (OEM/ODM)

Standard solutions may not fit every unique application. YM offers flexible engineering support to tailor the KJY-18 to your specific needs:

• Pressure Rating Adjustment: Custom calibration for specific cracking and resealing pressures.
• Mechanical Interface Customization: Modification of port types (e.g., NPT, MS), thread specifications, or mounting configurations.
• Electrical Tailoring: Options for different coil voltages, connector types, or integrated sensing feedback.
• Material Selection: Use of specific alloys or coatings for exceptional corrosion resistance or compatibility with unique fluids.

Precision Production & Quality Assurance

Every KJY-18 valve is manufactured under a controlled process that ensures consistent performance and reliability.

1. Precision Machining: Valve bodies and critical components are machined to tight tolerances in a controlled environment using CNC equipment.
2. Coil Assembly: The electromagnetic coil is wound with precision automation, ensuring consistent electrical characteristics and magnetic force, a process refined through our production of millions of PCB Board Relays.
3. Hermetic Sealing & Leak Testing: The final assembly undergoes a hermetic sealing process, followed by 100% mandatory leak testing to guarantee the specified leakage rate is achieved.
4. Functional & Endurance Testing: Each unit is tested for actuation time, dielectric strength, and contact resistance. Batch sampling undergoes full lifecycle testing to validate the 10-million-operation durability.
5. Final Inspection & Documentation: A final quality inspection verifies all specifications before release. Traceable documentation accompanies production batches.