Aviation hydraulic pressure value YXF-25

Aviation Hydraulic Pressure Valve YXF-25 – Precision Flow Control for Critical Systems

The Aviation Hydraulic Pressure Valve YXF-25 is a high-performance, precision-machined valve designed for aircraft hydraulic systems requiring reliable pressure regulation and flow control. Rated for harsh aerospace environments, the YXF-25 delivers consistent operation across a wide temperature and pressure range. As a key component within our hydraulic pressure sensor and pressure transducer hydraulic families, this valve ensures smooth actuation of landing gear, flight control actuators, and brake systems. For engineers specifying Aviation Valve T-5T or cold air solenoid valve QDF-42A, the YXF-25 offers an optimal balance of compact size, leak-tight sealing, and vibration resistance.

Technical Specifications

The YXF-25 aviation hydraulic valve is built to withstand extreme operating conditions. Key parameters include:

• Nominal Diameter: 25 mm (YXF-25 series)
• Max Operating Pressure: 21 MPa (210 bar / 3045 psi)
• Proof Pressure: 31.5 MPa (315 bar)
• Burst Pressure: ≥ 42 MPa
• Fluid Compatibility: Aviation hydraulic fluids (MIL-PRF-83282, MIL-PRF-5606, Skydrol)
• Temperature Range: -55°C to +135°C (ambient); fluid temperature -40°C to +120°C
• Leakage Rate (internal): ≤ 1.5 mL/min at rated pressure
• External Sealing: Leak rate ≤ 1×10⁻³ Pa·cm³/s (helium tested)
• Flow Coefficient (Cv): 0.8 (fully open)
• Body Material: Corrosion-resistant stainless steel (17-4PH) with anodized aluminum option
• Seal Material: FKM (Viton®) or PTFE for Skydrol compatibility
• Weight: <450 g
• Connection Type: MS33656 flareless or SAE straight thread O-ring port (customizable)

For reference, the valve also meets derived electrical characteristics (where solenoid-actuated versions are offered): coil power consumption 0.3~0.43 W; contact load 1A @28V d.c. for position indication; action time ≤4 ms; insulation resistance >500 MΩ under normal atmosphere. All YXF-25 units are 100% tested for dielectric strength (500 Vr.m.s. @50 Hz) and pressure integrity.

Product Images & Visuals

High-resolution image shows the YXF-25’s compact body, threaded ports, and laser-etched part number. Additional CAD drawings and cutaway views are available upon request.

Key Features & Advantages

Compared to generic industrial hydraulic valves, the YXF-25 is specifically optimized for aviation duty cycles:

• Aviation-grade sealing: Dual O-ring stem seals plus backup ring prevent external leakage even under pressure spikes – critical when used alongside aviation co sensor or fuel pressure transducer in engine bays.
• Vibration-resistant design: All internal components are locked with thread-locking compound and spring washers, tested per RTCA DO-160G Section 8.
• Wide temperature capability: From -55°C cold start to +135°C continuous operation, compatible with Skydrol and phosphate-ester fluids.
• Low torque operation: Precision-machined ball or poppet design reduces actuation force, improving pilot/mechanic ergonomics.
• Corrosion-resistant finish: Passivated stainless steel or hard-coat anodized aluminum meets 500-hour salt spray per ASTM B117.
• Traceable manufacturing: Each valve is serialized and accompanied by a test report including pressure decay, flow curve, and electrical continuity (if equipped).

How to install and use the YXF-25 in a hydraulic system:
Step 1: Confirm port thread and seal type (MS33656 or SAE J514). Apply aviation hydraulic sealant (e.g., Loctite 567).
Step 2: Mount the valve to the bracket or manifold using the two mounting holes (M5 x 0.8 – 6H). Torque to 4 N·m.
Step 3: Connect hydraulic lines – ensure no side load on the valve body.
Step 4: For solenoid-controlled variants, wire the coil to 28V d.c. via a protected circuit (max 0.43W).
Step 5: Perform a functional test at low pressure (500 psi) to verify smooth actuation and no external weeping.

By choosing our YXF-25, integrators benefit from reduced system weight (under 450g) and extended maintenance intervals thanks to hardened stainless steel internals. Our quality management system also produces hydraulic filter MQL-5 15MPA and aviation hand valve YSF-1A, ensuring consistent reliability across your fluid power portfolio.

Application Scenarios

The YXF-25 aviation hydraulic pressure valve is deployed in both fixed-wing and rotary-wing platforms, as well as ground support equipment:

• Aircraft landing gear actuation: Controls retraction/extension sequencing in combination with aoa sensor aviation and airspeed sensor inputs.
• Flight control secondary systems: Flap and slat drive isolation, trim tab shutoff.
• Brake and anti-skid systems: Pressure cut-off and metering for carbon brakes.
• Helicopter rotor brake and utility systems: Cargo hook release, winch control.
• Test benches and hydraulic ground power units (GPU): Pressure regulation and bypass functions.

Procurement teams will appreciate the YXF-25’s long service life (≥50,000 cycles without seal replacement) and its interoperability with existing pressure gauge ashcroft and digital air pressure meter monitoring systems. By standardizing on YXF-25, operators reduce spare parts inventory and training costs – a single valve type covers multiple aircraft sub-systems.

Certifications & Compliance

The YXF-25 is designed and tested to meet leading aerospace standards:

• AS9100D certified manufacturing facility
• MIL-V-5528 (valve, hydraulic, pressure control, general specification)
• RTCA DO-160G – Sections 4 (temperature), 5 (altitude), 7 (operating shocks), 8 (vibration), 11 (waterproofness)
• ISO 9001:2015 with aerospace sector approval
• REACH & RoHS 3 compliant (excluding high-performance seals where exemptions apply)

Each YXF-25 shipment includes a Certificate of Conformance (CoC) with traceability to raw material mill certificates. Third-party test reports are available for fire-resistant fluid compatibility (Skydrol 500B-4).

Customization Options

We understand that each aircraft program has unique interface and performance requirements. The YXF-25 can be tailored as follows:

• Port connection type: MS33656 flareless, SAE O-ring boss (ORB), or AN flared tube (37°).
• Actuation method: Manual lever, push-pull knob, or 28V d.c. solenoid (normally closed / normally open).
• Flow rate modification: Orifice sizing from 3 mm to 25 mm to match specific Cv values (0.2 ~ 2.0).
• Pressure range calibration: Cracking pressure adjustable between 3.5 and 21 MPa (factory set).
• Position indication: Built-in micro switch (SPDT, 1A/28V d.c.) for remote status monitoring – ideal for sensors of aircraft feedback loops.
• Material upgrade: Inconel 718 for extremely high-temperature (up to 300°C) or corrosive media.

Our engineering team provides 2D outline drawings and 3D STEP files for integration. For large-scale MRO or OEM contracts, we can develop a custom valve tailored to your hydraulic schematic, complementing our aviation temperature sensor ZWH-2 and oxygen value QF-21A product lines.

Production Process & Quality Assurance

Every YXF-25 aviation hydraulic valve undergoes a stringent manufacturing and validation protocol:

1. CNC machining of stainless steel or aluminum forgings on 5-axis centers (tolerance ±0.005 mm).
2. Deburring and ultrasonic cleaning – all fluid passages inspected with borescope.
3. Heat treatment (precipitation hardening for 17-4PH) followed by passivation per AMS 2700.
4. Assembly of poppet/ball and seat under cleanroom conditions (Class 7 ISO 14644).
5. Hydrostatic proof test at 1.5x rated pressure (31.5 MPa) – zero visible leakage.
6. Functional flow test using aviation hydraulic test stand – measures cracking pressure, full-open pressure, and internal leakage.
7. Low-pressure seal test (helium mass spectrometer) – leak rate ≤1×10⁻³ Pa·cm³/s.
8. 100% dimensional inspection with CMM and thread gauges.

Our factory also produces electronic pressure transducer and industrial pressure sensor lines using the same rigorous SPC methods, ensuring the YXF-25 meets the high reliability standards demanded by civil and military aviation customers worldwide.