PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20138R51SSValve,safety Relief

Emerson Automation Solutions Final Control Us Lp Div Navy Product Team · NSN 4820-01-071-8814 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-071-8814 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-071-8814. Primary manufacturer part number: 20138R51SS.
Features
  • Valve,safety Relief — FSC 4820
  • 3 verified cross-references
  • Primary manufacturer: Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-01-071-8814, 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. 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: Cancelled.

Catalog Facts
Item NameValve,safety Relief
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersAnderson Greenwood Lp Dba Anderson Greenwood Crosby (CAGE 01343); Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (CAGE 15187)
Technical Specifications
ParameterValue
NSN4820-01-071-8814
Primary Part Number20138R51SS
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEmerson Automation Solutions Final Control Us Lp Div Navy Product Team
StatusCANCELLED
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5133-00-228-1385 INTERCHANGEABLE
Drill,twist
5133-00-232-8161 INTERCHANGEABLE
Drill,twist
1650-00-364-652220138 INTERCHANGEABLE
Seat Assembly,valve
Pneudraulics, Inc.
5133-00-412-1748 INTERCHANGEABLE
Drill,twist
5930-00-557-6238SMB342717 INTERCHANGEABLE
Switch,push
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
6125-00-613-841220138 INTERCHANGEABLE
Motor-Generator
Hyundai Ideal Electric Co.
1005-00-798-099420-138 INTERCHANGEABLE
Control Box Panel a
Cyclohm Motor Corp
5840-01-047-270120138 INTERCHANGEABLE
Heater Cap Assembly
Mesa Microwave Inc.
4820-01-131-022920138C51SS CDS A15750 INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-131-764820138H01S0030 INTERCHANGEABLE
Valve,safety Relief
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Cross-Reference Index
Part NumberManufacturer
20138 Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
20138R51SS PRIMARY Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
20138R51SS Anderson Greenwood Lp Dba Anderson Greenwood Crosby (USA)
Related Parts
5133-00-228-1385INTERCHANGEABLE
DRILL,TWIST
5133-00-232-8161INTERCHANGEABLE
DRILL,TWIST
1650-00-364-6522INTERCHANGEABLE
SEAT ASSEMBLY,VALVE
20138
5133-00-412-1748INTERCHANGEABLE
DRILL,TWIST
5930-00-557-6238INTERCHANGEABLE
SWITCH,PUSH
SMB342717
6125-00-613-8412INTERCHANGEABLE
MOTOR-GENERATOR
20138
1005-00-798-0994INTERCHANGEABLE
CONTROL BOX PANEL A
20-138
5840-01-047-2701INTERCHANGEABLE
HEATER CAP ASSEMBLY
20138
4820-01-131-0229INTERCHANGEABLE
VALVE,SAFETY RELIEF
20138C51SS CDS A15750
4820-01-131-7648INTERCHANGEABLE
VALVE,SAFETY RELIEF
20138H01S0030
4820-01-142-3188INTERCHANGEABLE
VALVE,SAFETY RELIEF
20385A01E0210
4820-01-192-9561INTERCHANGEABLE
VALVE,SAFETY RELIEF
9456-G-41

Frequently Asked Questions

What is NSN 4820-01-071-8814?

NSN 4820-01-071-8814 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: cancelled.

What are the part numbers for NSN 4820-01-071-8814?

NSN 4820-01-071-8814 has 3 cross-referenced part numbers: 20138 (Anderson Greenwood Lp Dba Anderson Greenwood Crosby), 20138R51SS (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), 20138R51SS (Anderson Greenwood Lp Dba Anderson Greenwood Crosby).

What NSN replaces 4820-01-071-8814?

There are 12 known substitutes for 4820-01-071-8814: 5133-00-228-1385, 5133-00-232-8161, 1650-00-364-6522 and 9 more. Verify interchangeability with system specifications before substitution.

Is NSN 4820-01-071-8814 still in active supply?

NSN 4820-01-071-8814 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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