Model: 20138C51

Safety Relief Valve

Properties:

Flow Control Device
Disk
Bonnet Type
Exposed spring
Bonnet Attachment Method
Bolted
Maximum Operating Temp
150.0 degrees fahrenheit single response
End Application
Nimitzlass cvn
Valve Operation Method
Automatic
Flange Shape
Round all ends
Connection Type
Flange all ends
Valve Size
0.500 inches
Adjustable Pressure Range
+15.0/+19.0 pounds per square inch
Maximum Operating Pressure
275.0 pounds per square inch single response
Outside Diameter
3.500 inches all ends
Thickness
0.376 inches all ends
First Connection Face To Centerline Distance
3.250 inches
Second Connection Face To Centerline Distance
3.250 inches
Flange Face Design
Raised straight all ends
Raised Face Height
0.062 inches all ends
Raised Face Diameter
1.375 inches all ends
Material
Steel body
Material
Steel comp 304 flow control device
Material
Steel comp 304 seat
Material
Steel comp 304 stem
Material Specification
Astm a276, type 304 assn standard single material response seat
Material Specification
Astm a276, type 304 assn standard single material response stem
Material Specification
Astm a276, type 304 assn standard single material response flow control device
Material Specification
Astm a216, grade wcb assn standard single material response body
Media For Which Designed
Steam single response
NSN
4820-01-131-0229
Part Number
20138C51
Description
Valve,safety Relief
CAGE
01343

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 20138C51 NSN 4820-01-131-0229

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:
14.0000lbs
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:
127220
UFC:
64490
LTL:
77.5
LCL:
--
WCC:
671
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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