Model: 3,129,389

Safety Relief Valve

Properties:

Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Union
Disk Loading Method
Spring
Bolt Hole Quantity
4 all ends
Maximum Operating Temp
650.0 degrees fahrenheit single response
Valve Operation Method
Automatic
Flange Shape
Round with holes all ends
Connection Type
Flange all ends
Valve Size
1.250 inches
Adjustable Pressure Range
+51.0 to 70.0 pounds per square inch
Maximum Operating Pressure
150.0 pounds per square inch 1st response
Maximum Operating Pressure
200.0 pounds per square inch 2nd response
Maximum Operating Pressure
200.0 pounds per square inch 3rd response
Outside Diameter
4.500 inches all ends
Thickness
0.438 inches all ends
First Connection Face To Centerline Distance
5.000 inches
Bolt Hole Diameter
0.562 inches all ends
Second Connection Face To Centerline Distance
4.250 inches
Bolt Circle Diameter
3.375 inches all ends
Flange Face Design
Plain all ends
Material
Steel body
Material
Stainless steel flow control device
Material
Stainless steel stem
Material Specification
Mil-b-15083 cl b military specification single material response body
Media For Which Designed
Steam 1st response
Media For Which Designed
Water, fresh 2nd response
Media For Which Designed
Air 3rd response
Style Designator
C1a angle flanged ends
NSN
4820-01-221-2048
Part Number
3,129,389
Description
Valve,safety Relief
CAGE
53711

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 3,129,389 NSN 4820-01-221-2048

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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
30.0000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
051080
UFC:
29300
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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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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