PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

E8540AF51MValve,safety Relief

Anderson Greenwood Lp Dba Anderson Greenwood Crosby · NSN 4820-01-192-4346 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-192-4346 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-192-4346. Primary manufacturer part number: E8540AF51M.
Features
  • Valve,safety Relief — FSC 4820
  • Valve Operation Method: AUTOMATIC
  • Operating Pressure: 3400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Nominal Outside Diameter Tube Accommodated: 1.000 INCHES FIRST END IN
  • Media for Which Designed: WATER-OIL-GAS SINGLE RESPONSE
  • Flow Control Device: DISK
  • Adjustable Pressure Range: +1901.0 TO 2400.0 POUNDS PER SQUARE INCH LBS
  • 3 verified cross-references
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-192-4346, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Anderson Greenwood Lp Dba Anderson Greenwood Crosby. Government technical data includes 6 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
NSN4820-01-192-4346
Primary Part NumberE8540AF51M
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAnderson Greenwood Lp Dba Anderson Greenwood Crosby
StatusACTIVE
Valve Operation MethodAUTOMATIC
Operating Pressure3400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Nominal Outside Diameter Tube Accommodated1.000 INCHES FIRST END IN
Media for Which DesignedWATER-OIL-GAS SINGLE RESPONSE
Flow Control DeviceDISK
Adjustable Pressure Range+1901.0 TO 2400.0 POUNDS PER SQUARE INCH LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4940-00-006-09658-540 INTERCHANGEABLE
Maintenance Platform
C&h Distributors, Llc
5365-00-133-36628540 INTERCHANGEABLE
Spacer,sleeve
Dialight Corporation
5950-00-229-9797 INTERCHANGEABLE
Transformer,radio Frequency
5310-00-262-03597612520 INTERCHANGEABLE
Washer,lock
Us Army Aviation and Missile Command
5310-00-264-1151200074PC5 INTERCHANGEABLE
Washer,lock
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
6680-00-592-55928540-00 INTERCHANGEABLE
Indicator,oxygen Flow
Avox Systems Inc Dba Avox Systems Inc
4820-00-617-650681-540 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Matheson Co Div of G D Searle Medical Products
3030-01-047-02968540 INTERCHANGEABLE
Belt,v
Contitech Usa, Inc Dba Veyance Technologies
4820-01-185-2291E8540D51M INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-230-11988540 PIECE 4 INTERCHANGEABLE
Stem,fluid Valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Cross-Reference Index
Part NumberManufacturer
3,326,955 Naval Ship Systems Command (USA)
E8540AF51M PRIMARY Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
8540 Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
Related Parts
4940-00-006-0965INTERCHANGEABLE
MAINTENANCE PLATFORM
8-540
5365-00-133-3662INTERCHANGEABLE
SPACER,SLEEVE
8540
5950-00-229-9797INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
5310-00-262-0359INTERCHANGEABLE
WASHER,LOCK
7612520
5310-00-264-1151INTERCHANGEABLE
WASHER,LOCK
200074PC5
6680-00-592-5592INTERCHANGEABLE
INDICATOR,OXYGEN FLOW
8540-00
4820-00-617-6506INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
81-540
3030-01-047-0296INTERCHANGEABLE
BELT,V
8540
4820-01-185-2291INTERCHANGEABLE
VALVE,SAFETY RELIEF
E8540D51M
4820-01-230-1198INTERCHANGEABLE
STEM,FLUID VALVE
8540 PIECE 4
5305-01-263-8487INTERCHANGEABLE
SCREW,MACHINE
8540
6130-01-369-0070INTERCHANGEABLE
POWER SUPPLY
8540

Frequently Asked Questions

What is NSN 4820-01-192-4346?

NSN 4820-01-192-4346 is a Valve,safety Relief, manufactured by Anderson Greenwood Lp Dba Anderson Greenwood Crosby, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-192-4346?

NSN 4820-01-192-4346 has 3 cross-referenced part numbers: 3,326,955 (Naval Ship Systems Command), E8540AF51M (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 8540 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).

What NSN replaces 4820-01-192-4346?

There are 12 known substitutes for 4820-01-192-4346: 4940-00-006-0965, 5365-00-133-3662, 5950-00-229-9797 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of E8540AF51M?

Key specifications for E8540AF51M: Valve Operation Method: AUTOMATIC; Operating Pressure: 3400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Nominal Outside Diameter Tube Accommodated: 1.000 INCHES FIRST END IN; Media for Which Designed: WATER-OIL-GAS SINGLE RESPONSE. 6 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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