Model: 20357-7-940-101

Safety Relief Valve

Properties:

Flow Control Device
Disk
Bonnet Type
Inside screw
Bonnet Attachment Method
Threaded
Disk Loading Method
Spring
Maximum Operating Temp
165.0 degrees fahrenheit single response
Valve Operation Method
Automatic
Connection Type
Unthreaded internal tube all ends
Adjustable Pressure Range
+2901.0/+4000.0 pounds per square inch
Maximum Operating Pressure
6000.0 pounds per square inch single response
Criticality Code Justification
Zzzy
Opening Pressure Setting
2901.0 pounds per square inch
Outside Diameter Tube Accommodated
0.500 inches all ends
Material
Nickel alloy 400 flow control device or nickel alloy r-405 flow control device
Material
Nickel alloy 400 stem or nickel alloy r-405 stem
Material Specification
Qq-n-281, cl a federal specification 1st material response flow control device or qq-n-281, cl b federal specification 2nd material response flow control device
Material Specification
Qq-n-281, cl a federal specification 1st material response stem or qq-n-281, cl b federal specification 2nd material response stem
Media For Which Designed
Oxygen, gaseous single response
Reference Number Differentiating Characteristics
Requires special cleaning and packaging iaw mil-c-52211, for oxygen/nitrogen/hydrogen service
NSN
4820-01-267-4998
Part Number
20357-7-940-101
Description
Valve,safety Relief
CAGE
15187

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 20357-7-940-101 NSN 4820-01-267-4998

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:
Y

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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