Model: 638XB-3-6-2

Safety Relief Valve

Special Features:

Inlet, external straight pipe thd; outlet, 37 degrees flared tube

Properties:

Maximum Operating Temp
225.0 degrees fahrenheit single response
Minimum Operating Temp
-40.0 degrees fahrenheit
End Application
Engine, aircraft; f117-pw-100 (c-17a)
Valve Operation Method
Automatic
Adjustable Pressure Range
+40.0/+125.0 pounds per square inch
Material
Copper alloy body
Media For Which Designed
Air 1st response
Media For Which Designed
Hydraulic fluid, petroleum base 2nd response
NSN
4820-01-435-5152
Part Number
638XB-3-6-2
Description
Valve,safety Relief
CAGE
09990

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 638XB-3-6-2 NSN 4820-01-435-5152

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:
BA
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:
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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