Model: 20318

Safety Relief Valve

Properties:

Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Threaded
Disk Loading Method
Spring
Valve Discharge Flow Rate
10.0 gallons per minute
Renewable Seat Ring Type
Threaded
Bolt Hole Quantity
6 all ends
Maximum Operating Temp
70.0 degrees fahrenheit single response
Valve Operation Method
Automatic
Flange Shape
Round with holes all ends
Connection Type
Flange all ends
Features Provided
Pressure tight outlet side
Adjustable Pressure Range
+15.0/+30.0 pounds per square inch
Maximum Operating Pressure
250.0 pounds per square inch single response
Opening Pressure Setting
30.0 pounds per square inch
Outside Diameter
5.620 inches all ends
Thickness
0.812 inches all ends
Bolt Hole Diameter
0.562 inches all ends
Bolt Circle Diameter
3.938 inches all ends
Flange Face Design
Plain all ends
Material
Copper alloy 922 body
Material
Steel flow control device
Material
Steel seat
Material Specification
Astma276, type303 assn standard single material response flow control device
Material Specification
Astma276, type303 assn standard single material response seat
Material Specification
Qq-c-390, alloyd4/d/ federal specification single material response body
Media For Which Designed
Water, fresh single response
Style Designator
C1 angle
Style Designator
Angle
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.).
Nondefinitive Specification/std Data
B grade
NSN
4820-00-038-7018
Part Number
20318
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 20318 NSN 4820-00-038-7018

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:
--
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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