PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1.5F2 JLT/JOS-SP-15AValve,safety Relief

Emerson Automation Solutions Final Control Us Lp Div Navy Product Team · NSN 4820-01-432-2566 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-432-2566 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-432-2566. Primary manufacturer part number: 1.5F2 JLT/JOS-SP-15A.
Features
  • Valve,safety Relief — FSC 4820
  • Bonnet Type: INSIDE SPRING
  • Minimum Operating Temp: -20.0 FAHRENHEIT DEGF
  • Bolt Circle Nominal Diameter: 4.750 INCHES FIRST END IN
  • Bolt Hole Nominal Diameter: 0.620 INCHES SECOND END IN
  • Material: COPPER ALLOY 952 BODY
  • Flange Face Design: RAISED STRAIGHT ALL ENDS
  • Nominal Thickness: 0.690 INCHES SECOND END IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy 952 Body construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-432-2566, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. Government technical data includes 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-432-2566
Primary Part Number1.5F2 JLT/JOS-SP-15A
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEmerson Automation Solutions Final Control Us Lp Div Navy Product Team
StatusACTIVE
Bonnet TypeINSIDE SPRING
Minimum Operating Temp-20.0 FAHRENHEIT DEGF
Bolt Circle Nominal Diameter4.750 INCHES FIRST END IN
Bolt Hole Nominal Diameter0.620 INCHES SECOND END IN
MaterialCOPPER ALLOY 952 BODY
Flange Face DesignRAISED STRAIGHT ALL ENDS
Nominal Thickness0.690 INCHES SECOND END IN
Valve Operation MethodAUTOMATIC
Raised Face Nominal Height0.062 INCHES ALL ENDS IN
Flange ShapeROUND WITH HOLES ALL ENDS
Raised Face Nominal Diameter2.880 INCHES SECOND END IN
Bolt Circle Nominal Diameter3.880 INCHES SECOND END IN
First Connection Face to Centerline Distance4.375 INCHES IN
Operating Pressure285.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Second Connection Face to Centerline Distance4.875 INCHES IN
Material Document and ClassificationASTM B150, UNS C63000 ASSN STD SINGLE MATERIAL RESPONSE STEM
MaterialCOPPER ALLOY 630 FLOW CONTROL DEVICE
Media for Which DesignedLIQUID FIRST RESPONSE
Media for Which DesignedWATER, FRESH SECOND RESPONSE
Style DesignatorANGLE FLANGED ENDS
Material Document and ClassificationASTM B150, UNS C63000 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE
Material Document and ClassificationASME SB148, UNS C95200 ASSN STD SINGLE MATERIAL RESPONSE BODY
MaterialCOPPER ALLOY 630 STEM
Flow Control DeviceDISK
Bolt Hole Nominal Diameter0.750 INCHES FIRST END IN
Raised Face Nominal Diameter3.620 INCHES FIRST END IN
Nominal Outside Diameter6.000 INCHES FIRST END IN
Bolt Hole Quantity4 ALL ENDS
Nominal Outside Diameter5.000 INCHES SECOND END IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
4730-01-431-9152DS-G-73206-6 PC2 INTERCHANGEABLE
Nozzle,spray,fluid-Emulsion
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-432-0074119598 INTERCHANGEABLE
Retainer,disk,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-432-2523115854 INTERCHANGEABLE
Guide,valve Stem
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-432-2524114633 INTERCHANGEABLE
Disk,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-432-2567121009 INTERCHANGEABLE
Cap,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-432-2805114631 INTERCHANGEABLE
Nozzle Ring,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Cross-Reference Index
Part NumberManufacturer
DS-G-73206-6 Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
1.5F2 JLT/JOS-SP-15A PRIMARY Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
73206006-DS-G-73206-6 Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
Related Parts
4730-01-431-9152INTERCHANGEABLE
NOZZLE,SPRAY,FLUID-EMULSION
DS-G-73206-6 PC2
4820-01-432-0074INTERCHANGEABLE
RETAINER,DISK,VALVE
119598
4820-01-432-2523INTERCHANGEABLE
GUIDE,VALVE STEM
115854
4820-01-432-2524INTERCHANGEABLE
DISK,VALVE
114633
4820-01-432-2567INTERCHANGEABLE
CAP,VALVE
121009
4820-01-432-2805INTERCHANGEABLE
NOZZLE RING,VALVE
114631

Frequently Asked Questions

What is NSN 4820-01-432-2566?

NSN 4820-01-432-2566 is a Valve,safety Relief, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-432-2566?

NSN 4820-01-432-2566 has 3 cross-referenced part numbers: DS-G-73206-6 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 1.5F2 JLT/JOS-SP-15A (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 73206006-DS-G-73206-6 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).

What NSN replaces 4820-01-432-2566?

There are 6 known substitutes for 4820-01-432-2566: 4730-01-431-9152, 4820-01-432-0074, 4820-01-432-2523 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1.5F2 JLT/JOS-SP-15A?

Key specifications for 1.5F2 JLT/JOS-SP-15A: Bonnet Type: INSIDE SPRING; Minimum Operating Temp: -20.0 FAHRENHEIT DEGF; Bolt Circle Nominal Diameter: 4.750 INCHES FIRST END IN; Bolt Hole Nominal Diameter: 0.620 INCHES SECOND END IN. 30 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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