Model: 8171A

Safety Relief Valve

Properties:

Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Bolted
Disk Loading Method
Spring
Bolt Hole Quantity
12 2nd end
Bolt Hole Quantity
14 1st end
Maximum Operating Temp
650.0 degrees fahrenheit single response
Valve Operation Method
Automatic
Flange Shape
Round with holes 1st end
Flange Shape
Round with holes 2nd end
Connection Type
Flange 2nd end
Connection Type
Flange 1st end
Mounting Facility
Bracket
Valve Size
8.000 inches
Maximum Operating Pressure
50.0 pounds per square inch single response
Outside Diameter
12.500 inches 2nd end
Outside Diameter
12.750 inches 1st end
Thickness
0.812 inches 1st end
Thickness
1.437 inches 2nd end
First Connection Face To Centerline Distance
9.187 inches
Bolt Hole Diameter
0.687 inches 1st end
Bolt Hole Diameter
0.875 inches 2nd end
Second Connection Face To Centerline Distance
10.000 inches
Bolt Circle Diameter
11.062 inches 1st end
Bolt Circle Diameter
10.625 inches 2nd end
Flange Face Design
Plain 1st end
Material
Steel body
Material
Steel comp 303 flow control device
Material
Steel comp 416 packing
Material
Steel comp 416 stem
NSN
4820-00-875-1574
Part Number
8171A
Description
Valve,safety Relief
CAGE
72352

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.

Part 8171A NSN 4820-00-875-1574

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05488
FIIG:
A046B0
Concept No.:
1
App. Key:
AP
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
127220
UFC:
64490
LTL:
77.5
LCL:
77.5
WCC:
594
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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Schedule B and Export
  • Schedule B: 8481400000
  • SITC: 74740
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Safety or relief valves

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