Model: P9-644-23

Safety Relief Valve

Properties:

Thread Direction
Right-hand all ends
Flow Control Device
Poppet
Disk Loading Method
Spring
Maximum Operating Temp
400.0 degrees fahrenheit single response
Connection Style
G46b plain (pipe) all ends
Valve Operation Method
Automatic
Connection Type
Threaded external pipe all ends
Maximum Operating Pressure
200.0 pounds per square inch single response
Thread Size
0.125 inches all ends
Opening Pressure Setting
21.0 pounds per square inch
Material
Aluminum alloy 2024 flow control device and rubber silicone class q flow control device
Material
Aluminum alloy 2024 seat
Material
Aluminum alloy 2024 body
Material Specification
Qq-a-225/6, alloy2024, t4 federal specification single material response body
Material Specification
Qq-a-225/6, alloy2024, t4 federal specification single material response seat
Material Specification
Qq-a-225/6, alloy2024, t4 federal specification 1st material response flow control device
Media For Which Designed
Air 1st response
Media For Which Designed
Oil, chlorinated transformer 2nd response
Surface Treatment
Anodize
Surface Treatment Specification
Mil-a-8625, type 1 military specification single treatment response
Thread Series Designator
Npt all ends
NSN
4820-00-953-1970
Part Number
P9-644-23
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 P9-644-23 NSN 4820-00-953-1970

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

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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