Model: 20039

Safety Relief Valve

Properties:

Flow Control Device
Disk
Disk Loading Method
Spring
Bolt Hole Quantity
4 all ends
Valve Operation Method
Automatic
Flange Shape
Round with holes all ends
Connection Type
Flange all ends
Features Provided
Pressure tight outlet side
Valve Size
0.500 inches
Maximum Operating Pressure
275.0 pounds per square inch single response
Opening Pressure Setting
111.0 pounds per square inch
Outside Diameter
3.500 inches all ends
Thickness
0.438 inches all ends
First Connection Face To Centerline Distance
3.250 inches
Bolt Hole Diameter
0.500 inches all ends
Second Connection Face To Centerline Distance
3.250 inches
Bolt Circle Diameter
2.375 inches all ends
Flange Face Design
Raised with curve and radius all ends
Raised Face Height
0.062 inches all ends
Raised Face Diameter
1.375 inches all ends
Material
Rubber synthetic packing
Material
Steel body
Material
Steel comp 303 seat
Material
Steel comp 303 stem
Material
Steel flow control device
Material Specification
Astm a351, grade cf8m assn standard single material response body
Material Specification
Astm a351, grade cf8m assn standard single material response flow control device
Material Specification
Mil-p-5516, class b military specification single material response packing
Material Specification
Qq-s-763, class 303 federal specification single material response stem
Material Specification
Qq-s-763, class 303 federal specification single material response seat
Media For Which Designed
Steam single response
Test Data Document
81349-mil-s-901 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.).
NSN
4820-01-088-7460
Part Number
20039
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 20039 NSN 4820-01-088-7460

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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
15.0000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
A
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:
576
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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