NSN 4820-00-059-4678 Repair Services

Safety Relief Valve Overhaul, Repair, and Maintenance

MPN: 1426DUPLEX

Pricing and Lead Time Quote

Submit this form and receive an overhaul/repair pricing and lead time quote for NSN 4820-00-059-4678 safety relief valve
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NSN 4820000594678


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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 4820-00-059-4678 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 4820-00-059-4678 can be offered in repaired, serviceable, overhauled, or inspected conditions.
National Stock Number (NSN) 4820-00-059-4678
Categorization Safety or relief valves
Repairability Code

Approximate Weight 0.0lb
Flow Control Device Disk
Bonnet Type Exposed spring
Bonnet Attachment Method Bolted
Disk Loading Method Spring
Valve Discharge Flow Rate 71616.0 pounds per hour
Bolt Hole Quantity 8 2nd end
Valve Operation Method Automatic
Flange Shape Round with holes 2nd end
Connection Type Flange 2nd end
Maximum Operating Pressure 550.0 pounds per square inch single response
Opening Pressure Setting 525.0 pounds per square inch
Outside Diameter 9.000 inches 2nd end
Bolt Hole Diameter 1.125 inches 1st end
Bolt Circle Diameter 7.500 inches 2nd end
Flange Face Design Raised straight 2nd end
Raised Face Height 0.062 inches 2nd end
Raised Face Diameter 7.312 inches 1st end
Special Features Duplex valve, two safety valves mtd in onebody, 1st connection face to centerline distance9.000 in., 2nd connection face to centerlinedistance 6.625 in.
Material Steel stem
Style Designator Angle

Part Numbers

Part Number Company RNAAC (Repair Depot)
1426DUPLEX DRESSER, INC. 46 - MARITIME ADMINISTRATION