Home » FSC Catalog » Valves, Nonpowered » 4820-00-163-5161

Safety Relief Valve

SKU: 4820001635161 | Model: A42437
NSN 4820-00-163-5161 NSN 4820-00-163-5161

Specifications from the Manufacturer

Flow Control Device:
Bonnet Type:
Exposed spring
Bonnet Attachment Method:
Disk Loading Method:
Valve Discharge Flow Rate:
43200.0 pounds per hour
Renewable Seat Ring Type:
Bolt Hole Quantity:
8 1st end
Bolt Hole Quantity:
8 2nd end
Valve Operation Method:
Automatic or manual
Flange Shape:
Round with holes 1st end
Flange Shape:
Round with holes 2nd end
Features Provided:
Pressure tight outlet side
Valve Size:
2.500 inches
Criticality Code Justification:
Opening Pressure Setting:
710.0 pounds per square inch
Nominal Outside Diameter:
7.500 inches 1st end
Nominal Outside Diameter:
9.000 inches 2nd end
Nominal Thickness:
1.188 inches 2nd end
Nominal Thickness:
1.250 inches 1st end
Bolt Hole Nominal Diameter:
0.875 inches 1st end
Bolt Hole Nominal Diameter:
0.875 inches 2nd end
Bolt Circle Nominal Diameter:
5.875 inches 1st end
Bolt Circle Nominal Diameter:
7.250 inches 2nd end
Flange Face Design:
Raised straight 2nd end
Flange Face Design:
Recessed straight 1st end
Raised Face Nominal Height:
0.062 inches 2nd end
Raised Face Nominal Diameter:
5.500 inches 2nd end
Recess Nominal Diameter:
6.875 inches 1st end
Recess Nominal Depth:
0.062 inches 1st end
Special Features:
Items are being coded as critical to insure source inspection will be performed at the point of manufacture, prior to material receipt by the us navy or other dod components. these items are piece parts or end items in support of vital military hardware necessary to sustain the successful mission of the ships, submarines, and shore stations of the us navy. critical features including, but not limited to, dimensions, tolerances/clearances, electronic characteristics, and metallurgical properties will bespecified for government q ar (quality assurance representatives) to insure the highest possible degree of quality and reliability of these parts being delivered under navicp contracts
Style Designator:
Style Designator:
Angle flanged ends
Reference Number Differentiating Characteristics:
As differentiated by the valve discharge flow rate requirement

Pricing and Availability

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More in Valves, Nonpowered

NSN 4820-00-163-5161 Datasheet

Supply Class:


Cross Reference:

  • A42437

Cage Codes:

  • Pentair Valves & Controls Us Lp (CAGE 15187)

Replaced or Cancelled:

4820-00-163-5161 is not a replacement of any national stock number and has not been cancelled or replaced itself.


NIIN: 001635161
NSN: 4820001635161
DEMIL Code Meaning: Non-usml/non-ccli - no demil or dod tsc required. department of commerce may impose licensing requirements to certain destinations.
ADPE: 0 (Represents items with no adp components)

Freight Codes:

NMF Desc: Pressure Reg/red/relief Valves Noi
NMFC: 127220
UFC: 64490
LTL: 77.5
LCL: 77.5
WCC: Pumps and parts, (machinery and parts),(less than 35 feet)
TCC: No special type of cargo code applicable
SHC: Other or no special handling required (sh)
ADC: Shipment is not a consolidation and does not exceed 84 inches in any dimension.
ACC: Trailers, vehicles, machinery, shop and warehouse equipment and supplies including special tools and equipment, ground servicing
ASH: No special handling required.

Management Codes:

CTL: 7H--009 (MOE: DN)
AAC: Service/agency-managed (service/agency use only.) issue, transfer, or shipment is not subject to specialized controls other than those imposed by individual services supply policy. 1. the item is centrally managed, stocked, and issued. 2. re
QUP: 0
SLC: 0

Schedule B & Trade:

8481400000 (NAICS 332911)
Safety or relief valves

Safety or relief valves

End Use:

Industrial machines, other

Questions & Answers:

What are the historical prices recorded for this stock number?
No pre-dated pricing for this NSN could be found.
Does NSN 4820-00-163-5161 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
No recorded entities for this stock number.
How is national stock number 4820-00-163-5161 defined?
A valve designed to automatically release excessive pressures. it is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. it is not designed for regulation of continuously fluctuating loads. it may be inline or cartridge (manifold) design. excludes valve (1), relief, pressure and temperature.
What is the NIIN of NSN 4820-00-163-5161?
001635161 or 00-163-5161
Does this item require Demilitarization?
Non-usml/non-ccli - no demil or dod tsc required. department of commerce may impose licensing requirements to certain destinations. (note 9).
Is NSN 4820001635161 ITAR controlled?
No. This item is not ITAR Controlled.
What is the most recent solicitation for NSN 4820001635161?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Nov 13, 1971