NSN 4820-00-287-3139 Repair Services

Safety Relief Valve Overhaul, Repair, and Maintenance

MPN: 1990T-1/2X1-36-50PSI, 1990T-1/21 35-50PSI, 1990

Pricing and Lead Time Quote

Submit this form and receive an overhaul/repair pricing and lead time quote for NSN 4820-00-287-3139 safety relief valve
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NSN 4820002873139


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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 4820-00-287-3139 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 4820-00-287-3139 can be offered in repaired, serviceable, overhauled, or inspected conditions.
National Stock Number (NSN) 4820-00-287-3139
Categorization Safety or relief valves
Repairability Code

Approximate Weight 0.0lb
Pipe Size Accommodated 1.000 inches 1st end
Flow Control Device Disk
Disk Loading Method Spring
Valve Discharge Flow Rate 93.0 pounds per hour
Maximum Operating Temp 800.0 degrees fahrenheit single response
Minimum Operating Temp 401.0 degrees fahrenheit
Connection Style Socket err-100
Valve Operation Method Automatic
Connection Type Unthreaded internal pipe all ends
Adjustable Pressure Range +33.0/+55.0 pounds per square inch
Maximum Operating Pressure 2000.0 pounds per square inch single response
Opening Pressure Setting 50.0 pounds per square inch
Special Features W/lifting lever and inconel spring
Material Steel comp 410 stem
Material Specification Astm a479 assn standard single material response flow control device
Media For Which Designed Steam single response
Style Designator Angle
Nondefinitive Specification/std Data A-1 type and c class

Part Numbers

Part Number Company RNAAC (Repair Depot)
1990T-1/2X1-36-50PSI DRESSER, INC. AX - DLA LAND AND MARITIME
1990T-1/21 35-50PSI DRESSER, INC. AX - DLA LAND AND MARITIME
1990 DRESSER, INC. ZZ - USA