NSN 4820-00-530-9405 Repair Services

Safety Relief Valve Overhaul, Repair, and Maintenance

MPN: 559B-2MP-75

Pricing and Lead Time Quote

Submit this form and receive an overhaul/repair pricing and lead time quote for NSN 4820-00-530-9405 safety relief valve
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NSN 4820005309405


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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 4820-00-530-9405 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 4820-00-530-9405 can be offered in repaired, serviceable, overhauled, or inspected conditions.
National Stock Number (NSN) 4820-00-530-9405
Categorization Safety or relief valves
Repairability Code

Approximate Weight 0.2lb
Pipe Size Accommodated 0.250 inches 1st end
Thread Direction Right-hand 1st end
Flow Control Device Poppet
Disk Loading Method Spring
Maximum Operating Temp 250.0 degrees fahrenheit single response
Connection Style Plain, optional en (pipe) 2nd end
Valve Operation Method Automatic
Connection Type Threaded internal pipe 2nd end
Features Provided Pressure tight outlet side
Adjustable Pressure Range +0.5/+150.0 pounds per square inch
Maximum Operating Pressure 200.0 pounds per square inch single response
Thread Size 0.250 inches 2nd end
Opening Pressure Setting 75.0 pounds per square inch
Special Features Inline type
Material Copper alloy
Media For Which Designed Hydrogen 5th response
Style Designator Straight through note: to be used for valve bodies of one section only.
Thread Series Designator Npt 1st end

Part Numbers

Part Number Company RNAAC (Repair Depot)
559B-2MP-75 CIRCOR AEROSPACE, INC. AX - DLA LAND AND MARITIME