THERMAL RELEIF VALVE (P/N 488-4d1-15) - New Surplus
P/N: 488-4d1-15
Category: Valves & Actuators
This product requires a custom quote. Please contact our sales team for pricing information or submit an RFQ (Request for Quote).
Available Inventory
| Condition | Stock |
|---|---|
| New Surplus | 1 Available |
Product Description
The 488-4d1-15 is a spring-loaded thermal relief valve for aircraft hydraulic systems. This non-powered valve opens automatically when pressure rises due to thermal expansion in closed brake circuits, protecting components from overpressure damage. The poppet mechanism reseats when pressure normalizes, restoring normal system function.
Installation in brake lines and other closed hydraulic sections follows aircraft maintenance manual procedures and FAA AC 43.13-1B guidance. Proper valve operation ensures system safety during ground operations and thermal cycling.
Please note: Product descriptions are provided for informational purposes. Always refer to your aircraft's Illustrated Parts Catalog (IPC) to verify part compatibility and specifications.
Frequently Asked Questions
What is the THERMAL RELEIF VALVE (P/N 488-4d1-15)?
The 488-4d1-15 is a spring-loaded thermal relief valve for aircraft hydraulic systems. This non-powered valve opens automatically when pressure rises due to thermal expansion in closed brake circuits, protecting components from overpressure damage.
What hydraulic fluid type is the 488-4d1-15 compatible with?
Hydraulic component compatibility depends on the aircraft system design. Common aviation hydraulic fluids include MIL-PRF-5606 (mineral-based), MIL-PRF-83282 (synthetic), and Skydrol (phosphate ester). Verify the THERMAL RELEIF VALVE against your aircraft maintenance manual for fluid compatibility.
Does the 488-4d1-15 come pressure-tested and certified?
Overhauled and repaired hydraulic components are pressure-tested per manufacturer specifications and include 8130-3 documentation. The THERMAL RELEIF VALVE is available in: New Surplus. Contact us for test documentation on your selected condition.
What is the turnaround time for hydraulic component orders?
In-stock hydraulic components ship same business day before 3 PM EST. We provide 24/7 AOG support at (904) 998-9101 for urgent hydraulic system needs. RFQ submissions are typically quoted within 24 hours.
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