Model: 20381 ASSY 20381

Safety Relief Valve

Special Features:

2771

Properties:

Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Bolted
Disk Loading Method
Spring
Bolt Hole Quantity
4 all ends
Maximum Operating Temp
100.0 degrees fahrenheit single response
End Application
Wasp class lhd
Valve Operation Method
Automatic
Flange Shape
Round with holes all ends
Connection Type
Flange all ends
Mounting Facility
Bracket
Valve Size
0.500 inches
Maximum Operating Pressure
285.0 pounds per square inch single response
Opening Pressure Setting
55.0 pounds per square inch
Outside Diameter
3.500 inches all ends
Thickness
0.375 inches all ends
First Connection Face To Centerline Distance
1.670 inches
Bolt Hole Diameter
0.625 inches all ends
Second Connection Face To Centerline Distance
1.670 inches
Bolt Circle Diameter
2.375 inches all ends
Flange Face Design
Raised straight all ends
Raised Face Height
0.062 inches all ends
Raised Face Diameter
1.375 inches all ends
Material
Plastic polytetrafluoroethylene packing
Material
Stainless steel flow control device
Material
Stainless steel seat
Material
Stainless steel stem
Material
Steel uns j03002 body
Furnished Items And Quantity
4 nut
NSN
4820-01-437-4802
Part Number
20381 ASSY 20381
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 20381 ASSY 20381 NSN 4820-01-437-4802

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:
--
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:
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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