NSN 4820-00-202-5538 Repair Services

Safety Relief Valve Overhaul, Repair, and Maintenance

MPN: MC1603-3450, MC1613-3450, 2394210, MC1613-3500, 30F73935, HPC156100, 25-72002-1

Pricing and Lead Time Quote

Submit this form and receive an overhaul/repair pricing and lead time quote for NSN 4820-00-202-5538 safety relief valve
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NSN 4820002025538


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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 4820-00-202-5538 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 4820-00-202-5538 can be offered in repaired, serviceable, overhauled, or inspected conditions.
National Stock Number (NSN) 4820-00-202-5538
Categorization Safety or relief valves
Repairability Code

Approximate Weight 0.0lb
Thread Class 3a 1st end
Thread Direction Right-hand 1st end
Flow Control Device Disk
Disk Loading Method Spring
Valve Discharge Flow Rate 3000.0 pounds per hour
Connection Style Flared (tube) 1st end
Valve Operation Method Automatic
Connection Type Threaded external tube 1st end
Mounting Facility Threaded fastener
Features Provided Pressure tight outlet side
Thready Qty Per Inch (tpi) 20 1st end
Maximum Operating Pressure 3800.0 pounds per square inch single response
Thread Size 0.437 inches 1st end
Seat Angle 37.0 degrees 1st end
Opening Pressure Setting 3450.0 pounds per square inch
Outside Diameter Tube Accommodated 0.250 inches 1st end
Material Stainless steel stem
Media For Which Designed Air single response
Style Designator Straight thru
Thread Series Designator Unf 1st end

Part Numbers

Part Number Company RNAAC (Repair Depot)
MC1603-3450 EATON AEROSPACE LLC SB - 645 MSSQ/MSIAPCS
MC1613-3450 EATON AEROSPACE LLC SB - 645 MSSQ/MSIAPCS
2394210 TAVCO INC. SB - 645 MSSQ/MSIAPCS
MC1613-3500 EATON AEROSPACE LLC SB - 645 MSSQ/MSIAPCS
30F73935 NORTHROP GRUMMAN SYSTEMS CORPORATION SB - 645 MSSQ/MSIAPCS
HPC156100 TELEDYNE HYDRA-POWER SB - 645 MSSQ/MSIAPCS
25-72002-1 BOEING COMPANY, THE SB - 645 MSSQ/MSIAPCS
HPC156100 TACTAIR FLUID CONTROLS, INC. ZZ - USA