NSN 4820-00-540-1872 Repair Services

Safety Relief Valve Overhaul, Repair, and Maintenance

MPN: 4446441-105PS1, 2R1450, 4446441-501

Pricing and Lead Time Quote

Submit this form and receive an overhaul/repair pricing and lead time quote for NSN 4820-00-540-1872 safety relief valve
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NSN 4820005401872


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AS9120B:2015 ISO 9001 Audited and Certified

FAA and EASA Part 145 Certified Repair Stations Ensuring the highest standards of quality and compliance for our clients' needs.

We specialize in the repair and refurbishment of nsn components. From mechanical assemblies to rotor blades, our comprehensive capabilities cover a wide range of NSN parts, providing cost effective solutions to extend the operational life of vital equipment.

NSN 4820-00-540-1872 has been designated as a repairable item and has been included in our capabilities catalog. If you require overhaul or repair services use the form on this page to send us your information. We will provide you with a lead time and price quote.

Repairability and Datasheet

NSN 4820-00-540-1872 can be offered in repaired, serviceable, overhauled, or inspected conditions.
National Stock Number (NSN) 4820-00-540-1872
Categorization Safety or relief valves
Repairability Code

Approximate Weight 0.2lb
Thread Class 3b 2nd end
Thread Direction Right-hand 1st end
Flow Control Device Poppet
Bonnet Type Packing retaining
Disk Loading Method Spring
Valve Discharge Flow Rate 1.0 gallons per minute
Maximum Operating Temp 200.0 degrees fahrenheit single response
Connection Style Gasket sea (boss) 2nd end
Valve Operation Method Automatic
Connection Type Threaded internal boss 2nd end
Features Provided Pressure tight outlet side
Maximum Operating Pressure 250.0 pounds per square inch single response
Thread Size 0.548 inches 2nd end
Seat Angle 37.0 degrees 1st end
Opening Pressure Setting 105.0 pounds per square inch
Material Stainless steel flow control device
Media For Which Designed Oil, hydraulic single response
Style Designator Straight thru
Thread Series Designator Unjf 2nd end

Part Numbers

Part Number Company RNAAC (Repair Depot)
4446441-105PS1 BOEING COMPANY, THE AX - DLA LAND AND MARITIME
2R1450 CRISSAIR, INC. AX - DLA LAND AND MARITIME
4446441-501 BOEING COMPANY, THE AX - DLA LAND AND MARITIME
4446441-501 BOEING COMPANY, THE AX - DLA LAND AND MARITIME