PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20309JS91SSValve,safety Relief

Emerson Automation Solutions Final Control Us Lp Div Navy Product Team · NSN 4820-01-165-1417 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-165-1417 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-165-1417. Primary manufacturer part number: 20309JS91SS.
Features
  • Valve,safety Relief — FSC 4820
  • Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS
  • Valve Operation Method: AUTOMATIC
  • Connection Style: SOCKET ALL ENDS
  • Material: STEEL CORROSION RESISTING OVERALL
  • Nominal Pipe Size Accommodated: 0.500 INCHES ALL ENDS IN
  • Operating Pressure: 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
  • Flow Control Device: DISK
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Steel Corrosion Resisting Overall construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-165-1417, 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 11 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
NSN4820-01-165-1417
Primary Part Number20309JS91SS
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEmerson Automation Solutions Final Control Us Lp Div Navy Product Team
StatusACTIVE
Connection TypeUNTHREADED INTERNAL PIPE ALL ENDS
Valve Operation MethodAUTOMATIC
Connection StyleSOCKET ALL ENDS
MaterialSTEEL CORROSION RESISTING OVERALL
Nominal Pipe Size Accommodated0.500 INCHES ALL ENDS IN
Operating Pressure1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Flow Control DeviceDISK
Media for Which DesignedACETYLENE SINGLE RESPONSE
Style DesignatorANGLE
Disk Loading MethodSPRING
Adjustable Pressure Range+129.0 TO 153.0 POUNDS PER SQUARE INCH LBS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-156-684416X730 INTERCHANGEABLE
Bearing,ball,annular
Garwood/feller Inc Garwood Winch Div
4320-00-846-079119616 INTERCHANGEABLE
Motor,hydraulic
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
6220-00-979-8826 INTERCHANGEABLE
Panel,illumination
4820-01-091-1470A7365.001.156 INTERCHANGEABLE
Dog Bushing,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4730-01-091-1471A7361.001.156 INTERCHANGEABLE
Packing Nut
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-091-1480A12721.001.156 INTERCHANGEABLE
Stem,fluid Valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
5340-01-091-472006481101156 INTERCHANGEABLE
Seat,helical Compression Spring
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-111-136020309GS91SS INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
6550-01-139-750520300 INTERCHANGEABLE
Test Kit,anaerobe Identification
Biomerieux Inc
4820-01-167-906620309SS91SS INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Cross-Reference Index
Part NumberManufacturer
20309JS91SS Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
20309 Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
20309JS91SS PRIMARY Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
Related Parts
3110-00-156-6844INTERCHANGEABLE
BEARING,BALL,ANNULAR
16X730
4320-00-846-0791INTERCHANGEABLE
MOTOR,HYDRAULIC
19616
6220-00-979-8826INTERCHANGEABLE
PANEL,ILLUMINATION
4820-01-091-1470INTERCHANGEABLE
DOG BUSHING,VALVE
A7365.001.156
4730-01-091-1471INTERCHANGEABLE
PACKING NUT
A7361.001.156
4820-01-091-1480INTERCHANGEABLE
STEM,FLUID VALVE
A12721.001.156
5340-01-091-4720INTERCHANGEABLE
SEAT,HELICAL COMPRESSION SPRING
06481101156
4820-01-111-1360INTERCHANGEABLE
VALVE,SAFETY RELIEF
20309GS91SS
6550-01-139-7505INTERCHANGEABLE
TEST KIT,ANAEROBE IDENTIFICATION
20300
4820-01-167-9066INTERCHANGEABLE
VALVE,SAFETY RELIEF
20309SS91SS
5940-01-283-0374INTERCHANGEABLE
TERMINAL BOARD
210003
5120-01-349-1437INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT

Frequently Asked Questions

What is NSN 4820-01-165-1417?

NSN 4820-01-165-1417 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 4820-01-165-1417?

NSN 4820-01-165-1417 has 3 cross-referenced part numbers: 20309JS91SS (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20309 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20309JS91SS (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).

What NSN replaces 4820-01-165-1417?

There are 12 known substitutes for 4820-01-165-1417: 3110-00-156-6844, 4320-00-846-0791, 6220-00-979-8826 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20309JS91SS?

Key specifications for 20309JS91SS: Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS; End Item Identification: SHIP,OHIO CLASS SSN(TRIDENT); Valve Operation Method: AUTOMATIC; Connection Style: SOCKET ALL ENDS. 12 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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