PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A49148Valve,safety Relief

Emerson Automation Solutions Final Control Us Lp Div Navy Product Team · NSN 4820-00-410-6001 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-410-6001 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-410-6001. Primary manufacturer part number: A49148.
Features
  • Valve,safety Relief — FSC 4820
  • Connection Type: FLANGE SECOND END
  • Nominal Outside Diameter: 7.500 INCHES SECOND END IN
  • Bolt Hole Nominal Diameter: 0.875 INCHES SECOND END IN
  • Valve Discharge Flow Rate: 32700.0 POUNDS PER HOUR LBS
  • Bolt Circle Nominal Diameter: 7.250 INCHES FIRST END IN
  • Raised Face Nominal Diameter: 5.500 INCHES FIRST END IN
  • Bolt Circle Nominal Diameter: 5.875 INCHES SECOND END IN
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Nickel Alloy R-405 Stem construction
General Description

The Valve,safety Relief, cataloged under National Stock Number 4820-00-410-6001, 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 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-410-6001
Primary Part NumberA49148
Item NameValve,safety Relief
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerEmerson Automation Solutions Final Control Us Lp Div Navy Product Team
StatusACTIVE
Connection TypeFLANGE SECOND END
Nominal Outside Diameter7.500 INCHES SECOND END IN
Bolt Hole Nominal Diameter0.875 INCHES SECOND END IN
Valve Discharge Flow Rate32700.0 POUNDS PER HOUR LBS
Bolt Circle Nominal Diameter7.250 INCHES FIRST END IN
Raised Face Nominal Diameter5.500 INCHES FIRST END IN
Bolt Circle Nominal Diameter5.875 INCHES SECOND END IN
Style DesignatorANGLE FLANGED ENDS
Nominal Thickness1.187 INCHES FIRST END IN
Valve Size2.500 INCHES IN
Renewable Seat Ring TypeTHREADED
Bolt Hole Quantity8 FIRST END
Bonnet Attachment MethodBOLTED
Bonnet TypeEXPOSED SPRING
MaterialNICKEL ALLOY R-405 STEM
First Connection Face to Centerline Distance6.000 INCHES IN
Flange Face DesignRAISED STRAIGHT FIRST END
MaterialSTEEL COMP 304 SEAT
Raised Face Nominal Height0.062 INCHES FIRST END IN
Adjustable Pressure Range+696.0 TO 760.0 POUNDS PER SQUARE INCH LBS
Maximum Operating Temp850.0 FAHRENHEIT SINGLE RESPONSE DEGF
Flange Face DesignRAISED STRAIGHT SECOND END
Raised Face Nominal Diameter4.125 INCHES SECOND END IN
Nominal Outside Diameter9.000 INCHES FIRST END IN
MaterialSTEEL COMP 304 FLOW CONTROL DEVICE
Flange ShapeROUND WITH HOLES SECOND END
Valve Operation MethodAUTOMATIC
Raised Face Nominal Height0.500 INCHES SECOND END IN
Connection TypeFLANGE FIRST END
Flow Control DeviceDISK
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
4820-00-060-8193082791 INTERCHANGEABLE
Seat,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-00-163-1259 INTERCHANGEABLE
Valve,safety Relief
4820-01-019-2821A-49148 PIECE 37 INTERCHANGEABLE
Cylinder Assembly,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-046-4700028062 INTERCHANGEABLE
Retainer,disk,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-207-9905043607 INTERCHANGEABLE
Piston,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
3110-01-222-5455A-49148 PIECE 9 INTERCHANGEABLE
Bearing,disk,valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-263-9543A-49148 PIECE 18 INTERCHANGEABLE
Set Screw Rod
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-264-1925A-49148 PIECE 23 INTERCHANGEABLE
Stem,fluid Valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-264-1926043646 INTERCHANGEABLE
Stem,fluid Valve
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
4820-01-303-2542A-49148 PIECE 20 INTERCHANGEABLE
Slide,directional Control Linear
Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
Cross-Reference Index
Part NumberManufacturer
HNBJ Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
A49148 PRIMARY Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA)
Related Parts
4820-00-060-8193INTERCHANGEABLE
SEAT,VALVE
082791
4820-00-163-1259INTERCHANGEABLE
VALVE,SAFETY RELIEF
4820-01-019-2821INTERCHANGEABLE
CYLINDER ASSEMBLY,VALVE
A-49148 PIECE 37
4820-01-046-4700INTERCHANGEABLE
RETAINER,DISK,VALVE
028062
4820-01-207-9905INTERCHANGEABLE
PISTON,VALVE
043607
3110-01-222-5455INTERCHANGEABLE
BEARING,DISK,VALVE
A-49148 PIECE 9
4820-01-263-9543INTERCHANGEABLE
SET SCREW ROD
A-49148 PIECE 18
4820-01-264-1925INTERCHANGEABLE
STEM,FLUID VALVE
A-49148 PIECE 23
4820-01-264-1926INTERCHANGEABLE
STEM,FLUID VALVE
043646
4820-01-303-2542INTERCHANGEABLE
SLIDE,DIRECTIONAL CONTROL LINEAR
A-49148 PIECE 20

Frequently Asked Questions

What is NSN 4820-00-410-6001?

NSN 4820-00-410-6001 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 4820-00-410-6001?

NSN 4820-00-410-6001 has 2 cross-referenced part numbers: HNBJ (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), A49148 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).

What NSN replaces 4820-00-410-6001?

There are 10 known substitutes for 4820-00-410-6001: 4820-00-060-8193, 4820-00-163-1259, 4820-01-019-2821 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A49148?

Key specifications for A49148: Connection Type: FLANGE SECOND END; Nominal Outside Diameter: 7.500 INCHES SECOND END IN; Bolt Hole Nominal Diameter: 0.875 INCHES SECOND END IN; Valve Discharge Flow Rate: 32700.0 POUNDS PER HOUR LBS. 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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