Model: 20028

Safety Relief Valve

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
Valve Operation Method
Automatic
Flange Shape
Round with holes all ends
Connection Type
Flange all ends
Valve Size
0.500 inches
Adjustable Pressure Range
+35.0/+44.0 pounds per square inch
Maximum Operating Pressure
275.0 pounds per square inch single response
Outside Diameter
3.500 inches all ends
Face To Face Distance
3.344 inches
Thickness
0.440 inches all ends
First Connection Face To Centerline Distance
3.344 inches
Bolt Hole Diameter
0.620 inches all ends
Second Connection Face To Centerline Distance
3.250 inches
Bolt Circle Diameter
2.380 inches all ends
Flange Face Design
Raised with curve and radius all ends
Raised Face Height
0.180 inches all ends
Raised Face Diameter
1.190 inches all ends
Material
Steel body
Material
Steel flow control device
Material
Steel seat
Material
Steel stem
Material Specification
Astm a351, grade cf8 assn standard single material response body
Material Specification
Qq-s-763 federal specification single material response flow control device
Material Specification
Qq-s-763 federal specification single material response seat
Material Specification
Qq-s-763 federal specification single material response stem
Media For Which Designed
Gas, natural single response
NSN
4820-01-079-9011
Part Number
20028
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 20028 NSN 4820-01-079-9011

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:
0.2000lbs
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:
051080
UFC:
29300
LTL:
RATING VARIABLE
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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