NSN 4820-00-591-5330 Repair Services

Safety Relief Valve Overhaul, Repair, and Maintenance

MPN: 12C506, 5159B4MP120

Pricing and Lead Time Quote

Submit this form and receive an overhaul/repair pricing and lead time quote for NSN 4820-00-591-5330 safety relief valve
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NSN 4820005915330


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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 4820-00-591-5330 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 4820-00-591-5330 can be offered in repaired, serviceable, overhauled, or inspected conditions.
National Stock Number (NSN) 4820-00-591-5330
Categorization Safety or relief valves
Repairability Code

Approximate Weight 0.0lb
Thread Direction Right-hand all ends
Flow Control Device Poppet
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
Adjustable Pressure Range +10.0/+2400.0 pounds per square inch
Maximum Operating Pressure 2500.0 pounds per square inch single response
Thread Size 0.500 inches all ends
Opening Pressure Setting 120.0 pounds per square inch
Material Aluminum alloy 2024 body
Media For Which Designed Hydrogen 5th response
Style Designator Straight through note: to be used for valve bodies of separable sections.
Thread Series Designator Npt all ends

Part Numbers

Part Number Company RNAAC (Repair Depot)
12C506 ELLIS & WATTS INTERNATIONAL, LLC SB - 645 MSSQ/MSIAPCS
5159B4MP120 CIRCOR AEROSPACE, INC. SB - 645 MSSQ/MSIAPCS