Model: 20501-1

Safety Relief Valve

Properties:

Thread Class
3b all ends
Thread Direction
Right-hand all ends
Flow Control Device
Poppet
Disk Loading Method
Spring
Valve Discharge Flow Rate
3.0 gallons per minute
Connection Style
G4 gasket sea (boss) all ends
Connection Style
Gasket sea (boss) all ends
Valve Operation Method
Automatic
Connection Type
Threaded internal boss all ends
Mounting Facility
Threaded fastener
Features Provided
Pressure tight outlet side
Thready Qty Per Inch (tpi)
18 all ends
Adjustable Pressure Range
+300.0/+725.0 pounds per square inch
Adjustable Pressure Range
+300.0 to 725.0 pounds per square inch
Maximum Operating Pressure
725.0 pounds per square inch single response
Thread Size
0.562 inches all ends
Opening Pressure Setting
725.0 pounds per square inch
Media For Which Designed
Hydraulic fluid, phosphate-ester base single response
Test Data Document
00502-n20501 drawing (this is the basic governing drawing, such as a contractor drawing, original equipment manufacturer drawing, etc.; excludes any specification, standard or other document that may be referenced in a basic governing drawing)
Thread Series Designator
Unf all ends
NSN
4820-00-094-8123
Part Number
20501-1
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 20501-1 NSN 4820-00-094-8123

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:
U
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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