PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A47800Valve,safety Relief

Emerson Automation Solutions Final Control Us Lp Div Navy Product Team · NSN 4820-00-163-5180 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-163-5180 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-163-5180. Primary manufacturer part number: A47800.
Features
  • Valve,safety Relief — FSC 4820
  • Bonnet Type: EXPOSED SPRING
  • Disk Loading Method: SPRING
  • Flow Control Device: DISK
  • Nominal Outside Diameter: 10.000 INCHES SECOND END IN
  • Recess Nominal Diameter: 8.750 INCHES FIRST END IN
  • Nominal Outside Diameter: 9.625 INCHES FIRST END IN
  • Raised Face Nominal Height: 0.062 INCHES SECOND END IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-163-5180, 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 30 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-163-5180
Primary Part NumberA47800
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEmerson Automation Solutions Final Control Us Lp Div Navy Product Team
StatusACTIVE
Bonnet TypeEXPOSED SPRING
Disk Loading MethodSPRING
Flow Control DeviceDISK
Nominal Outside Diameter10.000 INCHES SECOND END IN
Recess Nominal Diameter8.750 INCHES FIRST END IN
Nominal Outside Diameter9.625 INCHES FIRST END IN
Raised Face Nominal Height0.062 INCHES SECOND END IN
Opening Pressure Setting1350.0 POUNDS PER SQUARE INCH LBS
Valve Operation MethodAUTOMATIC OR MANUAL
Nominal Thickness1.688 INCHES FIRST END IN
Bolt Hole Quantity8 FIRST END
Bolt Hole Nominal Diameter0.875 INCHES SECOND END IN
Bolt Circle Nominal Diameter7.875 INCHES SECOND END IN
Flange ShapeROUND WITH HOLES SECOND END
Bolt Circle Nominal Diameter7.500 INCHES FIRST END IN
Reference Number Differentiating CharacteristicsAS DIFFERENTIATED BY THE VALVE DISCHARGE FLOW RATE REQUIREMENT
Recess Nominal Depth0.062 INCHES FIRST END IN
Features ProvidedPRESSURE TIGHT OUTLET SIDE
Flange Face DesignRECESSED STRAIGHT FIRST END
Bolt Hole Quantity8 SECOND END
Valve Discharge Flow Rate59900.0 POUNDS PER HOUR LBS
Bonnet Attachment MethodBOLTED
Nominal Thickness1.188 INCHES SECOND END IN
Valve Size2.500 INCHES IN
Raised Face Nominal Diameter6.188 INCHES SECOND END IN
Flange ShapeROUND WITH HOLES FIRST END
Bolt Hole Nominal Diameter1.125 INCHES FIRST END IN
Style DesignatorANGLE FLANGED ENDS
Flange Face DesignRAISED STRAIGHT SECOND END
Renewable Seat Ring TypeTHREADED
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
4820-00-135-2317S48183 INTERCHANGEABLE
Guide,valve with Bearing
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-00-163-5178 INTERCHANGEABLE
Valve,safety Relief
4820-00-163-5179 INTERCHANGEABLE
Valve,safety Relief
4820-00-931-2133 INTERCHANGEABLE
Valve,safety Relief
4820-01-046-132834616 INTERCHANGEABLE
Cap,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-076-049983048 INTERCHANGEABLE
Nozzle Ring,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Cross-Reference Index
Part NumberManufacturer
A47800 Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
Related Parts
4820-00-135-2317INTERCHANGEABLE
GUIDE,VALVE WITH BEARING
S48183
4820-00-163-5178INTERCHANGEABLE
VALVE,SAFETY RELIEF
4820-00-163-5179INTERCHANGEABLE
VALVE,SAFETY RELIEF
4820-00-931-2133INTERCHANGEABLE
VALVE,SAFETY RELIEF
4820-01-046-1328INTERCHANGEABLE
CAP,VALVE
34616
4820-01-076-0499INTERCHANGEABLE
NOZZLE RING,VALVE
83048

Frequently Asked Questions

What is NSN 4820-00-163-5180?

NSN 4820-00-163-5180 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 4820-00-163-5180?

NSN 4820-00-163-5180 has 1 cross-referenced part number: A47800 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).

What NSN replaces 4820-00-163-5180?

There are 6 known substitutes for 4820-00-163-5180: 4820-00-135-2317, 4820-00-163-5178, 4820-00-163-5179 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A47800?

Key specifications for A47800: Bonnet Type: EXPOSED SPRING; Disk Loading Method: SPRING; Flow Control Device: DISK; Nominal Outside Diameter: 10.000 INCHES SECOND END IN. 30 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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