PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12D-R/PL4603Valve,check

Admiral Valve Llc Dba Cpv Manufacturing · NSN 4820-01-506-1868 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-506-1868 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-506-1868. Primary manufacturer part number: 12D-R/PL4603.
Features
  • Valve,check — FSC 4820
  • Material: COPPER ALLOY BODY
  • Style Designator: STRAIGHT THRU
  • Material: COPPER ALLOY SEAT
  • Nominal Pipe Size Accommodated: 2.000 INCHES ALL ENDS IN
  • Flow Control Device: DISK
  • Material: COPPER ALLOY STEM
  • Valve Operation Method: AUTOMATIC
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Copper Alloy Body construction
General Description

The Valve,check, cataloged under National Stock Number 4820-01-506-1868, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Admiral Valve Llc Dba Cpv Manufacturing. Government technical data includes 8 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-506-1868
Primary Part Number12D-R/PL4603
Item NameValve,check
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerAdmiral Valve Llc Dba Cpv Manufacturing
StatusACTIVE
MaterialCOPPER ALLOY BODY
Style DesignatorSTRAIGHT THRU
MaterialCOPPER ALLOY SEAT
Nominal Pipe Size Accommodated2.000 INCHES ALL ENDS IN
Flow Control DeviceDISK
MaterialCOPPER ALLOY STEM
Valve Operation MethodAUTOMATIC
MaterialCOPPER ALLOY FLOW CONTROL DEVICE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
4820-01-136-773112D 2 1/2IN INTERCHANGEABLE
Valve,check
Admiral Valve Llc Dba Cpv Manufacturing
4820-01-194-6836098052AL INTERCHANGEABLE
Seat,valve
Admiral Valve Llc Dba Cpv Manufacturing
4820-01-194-6929098482AG INTERCHANGEABLE
Stem,fluid Valve
Admiral Valve Llc Dba Cpv Manufacturing
4820-01-195-6389098472AG INTERCHANGEABLE
Disk,valve
Admiral Valve Llc Dba Cpv Manufacturing
4820-01-198-0978098823AG INTERCHANGEABLE
Disk,valve
Admiral Valve Llc Dba Cpv Manufacturing
4820-01-198-418812-D-R PL-4226,PL-4551 6IN INTERCHANGEABLE
Valve,check
Admiral Valve Llc Dba Cpv Manufacturing
4820-01-198-861312D-3IN A-9886 INTERCHANGEABLE
Valve,check
Admiral Valve Llc Dba Cpv Manufacturing
4820-01-212-4746A-9886 PL-4433,PL-4432 4IN INTERCHANGEABLE
Valve,check
Admiral Valve Llc Dba Cpv Manufacturing
4820-01-249-6562098053DD INTERCHANGEABLE
Seat,valve
Admiral Valve Llc Dba Cpv Manufacturing
4820-01-506-2796098820AG INTERCHANGEABLE
Disk,valve
Admiral Valve Llc Dba Cpv Manufacturing
Cross-Reference Index
Part NumberManufacturer
A-9886 Admiral Valve Llc Dba Cpv Manufacturing (USA)
A9886-PL4370 AND PL4603 Admiral Valve Llc Dba Cpv Manufacturing (USA)
12D-R/PL4603 PRIMARY Admiral Valve Llc Dba Cpv Manufacturing (USA)
Related Parts
4820-01-136-7731INTERCHANGEABLE
VALVE,CHECK
12D 2 1/2IN
4820-01-194-6836INTERCHANGEABLE
SEAT,VALVE
098052AL
4820-01-194-6929INTERCHANGEABLE
STEM,FLUID VALVE
098482AG
4820-01-195-6389INTERCHANGEABLE
DISK,VALVE
098472AG
4820-01-198-0978INTERCHANGEABLE
DISK,VALVE
098823AG
4820-01-198-4188INTERCHANGEABLE
VALVE,CHECK
12-D-R PL-4226,PL-4551 6IN
4820-01-198-8613INTERCHANGEABLE
VALVE,CHECK
12D-3IN A-9886
4820-01-212-4746INTERCHANGEABLE
VALVE,CHECK
A-9886 PL-4433,PL-4432 4IN
4820-01-249-6562INTERCHANGEABLE
SEAT,VALVE
098053DD
4820-01-506-2796INTERCHANGEABLE
DISK,VALVE
098820AG
4820-01-506-2987INTERCHANGEABLE
STEM,FLUID VALVE
098480AG

Frequently Asked Questions

What is NSN 4820-01-506-1868?

NSN 4820-01-506-1868 is a Valve,check, manufactured by Admiral Valve Llc Dba Cpv Manufacturing, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-506-1868?

NSN 4820-01-506-1868 has 3 cross-referenced part numbers: A-9886 (Admiral Valve Llc Dba Cpv Manufacturing), A9886-PL4370 AND PL4603 (Admiral Valve Llc Dba Cpv Manufacturing), 12D-R/PL4603 (Admiral Valve Llc Dba Cpv Manufacturing).

What NSN replaces 4820-01-506-1868?

There are 11 known substitutes for 4820-01-506-1868: 4820-01-136-7731, 4820-01-194-6836, 4820-01-194-6929 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12D-R/PL4603?

Key specifications for 12D-R/PL4603: Material: COPPER ALLOY BODY; Style Designator: STRAIGHT THRU; Material: COPPER ALLOY SEAT; Nominal Pipe Size Accommodated: 2.000 INCHES ALL ENDS IN. 8 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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