NSN 4820-00-404-7707 Repair Services

Safety Relief Valve Overhaul, Repair, and Maintenance

MPN: A49149REVC1 1-2F2 1-2HNPF

Pricing and Lead Time Quote

Submit this form and receive an overhaul/repair pricing and lead time quote for NSN 4820-00-404-7707 safety relief valve
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NSN 4820004047707


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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 4820-00-404-7707 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 4820-00-404-7707 can be offered in repaired, serviceable, overhauled, or inspected conditions.
National Stock Number (NSN) 4820-00-404-7707
Categorization Safety or relief valves
Repairability Code H

If condemned or uneconomically repairable, then dispose at intermediate level.

Approximate Weight 62.5lb
Flow Control Device Disk
Bonnet Type Exposed spring
Bonnet Attachment Method Bolted
Disk Loading Method Spring
Valve Discharge Flow Rate 8500.0 pounds per hour
Renewable Seat Ring Type Threaded
Bolt Hole Quantity 8 1st end
Maximum Operating Temp 850.0 degrees fahrenheit single response
Valve Operation Method Manual
Flange Shape Round with holes 2nd end
Connection Type Flange 1st end
Valve Size 1.000 inches
Adjustable Pressure Range +700.0/+769.0 pounds per square inch
Maximum Operating Pressure 705.0 pounds per square inch single response
Criticality Code Justification Cqcy
Opening Pressure Setting 705.0 pounds per square inch
Outside Diameter 7.500 inches 1st end
Thickness 1.000 inches 1st end
First Connection Face To Centerline Distance 4.750 inches
Bolt Hole Diameter 0.875 inches 2nd end
Second Connection Face To Centerline Distance 5.000 inches
Bolt Circle Diameter 5.875 inches 1st end
Flange Face Design Raised straight 2nd end
Raised Face Height 0.437 inches 2nd end
Raised Face Diameter 4.125 inches 1st end
Material Stainless steel stem
Style Designator Angle flanged ends
Reference Number Differentiating Characteristics As differentiated by 1.500 in. Pipe size 1st end and 2.500 in. Pipe size 2nd end

Part Numbers

Part Number Company RNAAC (Repair Depot)
A49149REVC1 1-2F2 1-2HNPF PENTAIR VALVES & CONTROLS US LP HD - NAVAL INVENTORY CONTROL POINT