Model: D539A2M18

Safety Relief Valve

Properties:

Pipe Size Accommodated
0.250 inches 1st end
Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Disk Loading Method
Spring
Maximum Operating Temp
250.0 degrees fahrenheit 1st response
Maximum Operating Temp
250.0 degrees fahrenheit 2nd response
Maximum Operating Temp
250.0 degrees fahrenheit 3rd response
Maximum Operating Temp
250.0 degrees fahrenheit 4th response
Connection Style
Plain (pipe) 1st end
Valve Operation Method
Manual
Connection Type
Threaded external pipe 1st end
Thready Qty Per Inch (tpi)
18 1st end
Maximum Operating Pressure
200.0 pounds per square inch 1st response
Maximum Operating Pressure
200.0 pounds per square inch 2nd response
Maximum Operating Pressure
200.0 pounds per square inch 3rd response
Maximum Operating Pressure
200.0 pounds per square inch 4th response
Thread Size
0.250 inches 1st end
Opening Pressure Setting
18.0 pounds per square inch
Material
Aluminum alloy
Media For Which Designed
Hydrogen 4th response
Media For Which Designed
Acetylene 1st response
Media For Which Designed
Air 2nd response
Media For Which Designed
Ammonia, gaseous 3rd response
Style Designator
Straight thru
Thread Series Designator
Npt 1st end
NSN
4820-00-051-5222
Part Number
D539A2M18
Description
Valve,safety Relief
CAGE
91816

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 D539A2M18 NSN 4820-00-051-5222

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

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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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