PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20094R51MValve,safety Relief

Emerson Automation Solutions Final Control Us Lp Div Navy Product Team · NSN 4820-01-237-9957 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-237-9957 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-237-9957. Primary manufacturer part number: 20094R51M.
Features
  • Valve,safety Relief — FSC 4820
  • Maximum Operating Temp: 150.0 FAHRENHEIT SINGLE RESPONSE DEGF
  • Material: NICKEL ALLOY FLOW CONTROL DEVICE
  • Nominal Outside Diameter Tube Accommodated: 0.500 INCHES ALL ENDS IN
  • Operating Pressure: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Material: COPPER ALLOY STEM
  • Adjustable Pressure Range: +151.0 TO 180.0 POUNDS PER SQUARE INCH LBS
  • Material: NICKEL ALLOY SEAT
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Nickel Alloy Flow Control Device construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-237-9957, 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 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-237-9957
Primary Part Number20094R51M
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEmerson Automation Solutions Final Control Us Lp Div Navy Product Team
StatusACTIVE
Maximum Operating Temp150.0 FAHRENHEIT SINGLE RESPONSE DEGF
MaterialNICKEL ALLOY FLOW CONTROL DEVICE
Nominal Outside Diameter Tube Accommodated0.500 INCHES ALL ENDS IN
Operating Pressure400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MaterialCOPPER ALLOY STEM
Adjustable Pressure Range+151.0 TO 180.0 POUNDS PER SQUARE INCH LBS
MaterialNICKEL ALLOY SEAT
Valve Operation MethodAUTOMATIC
Connection TypeUNTHREADED INTERNAL TUBE ALL ENDS
Style DesignatorANGLE
MaterialCOPPER ALLOY BODY
Flow Control DeviceDISK
Connection StyleSOCKET WITH BRAZING RING (TUBE) ALL ENDS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5950-00-178-8549TF106AU INTERCHANGEABLE
Transformer,power Autotransforme
Joint Electronics Type Designation System
3455-00-232-421120092 INTERCHANGEABLE
Reamer,machine
Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa
5340-00-410-87792009-5 INTERCHANGEABLE
Escutcheon Plate
Adams Rite Aerospace, Inc
3040-00-784-086520092 INTERCHANGEABLE
Shaft,shouldered
Solar Turbines Incorporated Dba Solar Turbines Incorporated
5935-01-037-7798 INTERCHANGEABLE
Connector,elect
4820-01-127-666820092M41M INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-243-345120093F51M INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4920-01-300-201220092 INTERCHANGEABLE
Test Program Set
Textron Systems Corporation Dba Textron Systems Corp
4820-01-396-052620092 ASSEMBLY 20094L51M INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-397-122020092 ASSEMBLY 20092G51M INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Cross-Reference Index
Part NumberManufacturer
20094R51M Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
20094R51M PRIMARY Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
20092 Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
Related Parts
5950-00-178-8549INTERCHANGEABLE
TRANSFORMER,POWER AUTOTRANSFORME
TF106AU
3455-00-232-4211INTERCHANGEABLE
REAMER,MACHINE
20092
5340-00-410-8779INTERCHANGEABLE
ESCUTCHEON PLATE
2009-5
3040-00-784-0865INTERCHANGEABLE
SHAFT,SHOULDERED
20092
5935-01-037-7798INTERCHANGEABLE
CONNECTOR,ELECT
4820-01-127-6668INTERCHANGEABLE
VALVE,SAFETY RELIEF
20092M41M
4820-01-243-3451INTERCHANGEABLE
VALVE,SAFETY RELIEF
20093F51M
4920-01-300-2012INTERCHANGEABLE
TEST PROGRAM SET
20092
4820-01-396-0526INTERCHANGEABLE
VALVE,SAFETY RELIEF
20092 ASSEMBLY 20094L51M
4820-01-397-1220INTERCHANGEABLE
VALVE,SAFETY RELIEF
20092 ASSEMBLY 20092G51M
5342-01-418-5682INTERCHANGEABLE
MOUNT,RESILIENT,WEAPON SYSTEM
20092
5305-01-486-7921INTERCHANGEABLE
SCREW,MACHINE
20092

Frequently Asked Questions

What is NSN 4820-01-237-9957?

NSN 4820-01-237-9957 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 4820-01-237-9957?

NSN 4820-01-237-9957 has 3 cross-referenced part numbers: 20094R51M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20094R51M (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 20092 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).

What NSN replaces 4820-01-237-9957?

There are 12 known substitutes for 4820-01-237-9957: 5950-00-178-8549, 3455-00-232-4211, 5340-00-410-8779 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20094R51M?

Key specifications for 20094R51M: Maximum Operating Temp: 150.0 FAHRENHEIT SINGLE RESPONSE DEGF; Material: NICKEL ALLOY FLOW CONTROL DEVICE; Nominal Outside Diameter Tube Accommodated: 0.500 INCHES ALL ENDS IN; Operating Pressure: 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 13 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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