Model: 20373

Safety Relief Valve

Properties:

Thread Class
3b 2nd end
Thread Class
3b 1st end
Thread Direction
Right-hand 2nd end
Thread Direction
Right-hand 1st end
Disk Loading Method
Spring
Valve Discharge Flow Rate
3.5 gallons per minute
Connection Style
G4 gasket sea (boss) 1st end
Connection Style
G4 gasket sea (boss) 2nd end
Connection Style
Gasket sea (boss) 1st end
Connection Style
Gasket sea (boss) 2nd end
Connection Type
Threaded internal boss 1st end
Connection Type
Threaded internal boss 2nd end
Features Provided
Pressure tight outlet side
Thready Qty Per Inch (tpi)
18 1st end
Adjustable Pressure Range
+1000.0/+2300.0 pounds per square inch
Maximum Operating Pressure
2300.0 pounds per square inch single response
Thread Size
0.562 inches 1st end
Thread Size
0.562 inches 2nd end
Media For Which Designed
Hydraulic fluid, phosphate-ester base single response
Style Designator
Straight thru
Test Data Document
81349-mil-v-5523 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Thread Series Designator
Unf 1st end
Thread Series Designator
Unf 2nd end
Nondefinitive Specification/std Data
I type and ab class
NSN
4820-00-540-4108
Part Number
20373
Description
Valve,safety Relief
CAGE
81982

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 20373 NSN 4820-00-540-4108

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:
HS
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
1.0000lbs
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:
77.5
WCC:
594
TCC:
Z
SHC:
Z
ACC:
Equipment for Aircraft

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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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