Model: 174A

Safety Relief Valve

Special Features:

W/diaphragm seal of bonnet cavity

Properties:

Pipe Size Accommodated
2.000 inches 1st end
Thread Direction
Right-hand all ends
Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Bolted
Disk Loading Method
Spring
Maximum Operating Temp
250.0 degrees fahrenheit single response
Connection Style
G9 plain, optional en (pipe) all ends
Valve Operation Method
Automatic or manual
Connection Type
Threaded internal pipe all ends
Features Provided
Valve stem lock shield and bonnet packing
Maximum Operating Pressure
160.0 pounds per square inch single response
Thread Size
2.000 inches all ends
Opening Pressure Setting
30.0 pounds per square inch
Material
Copper alloy stem
Material
Copper alloy 836 body
Material
Copper alloy 836 flow control device or rubber silicone class q flow control device
Material
Copper alloy 836 seat
Material Specification
Qq-c-390, alloy b5/d federal specification 1st material response flow control device
Material Specification
Qq-c-390, alloy b5/d federal specification single material response body
Material Specification
Qq-c-390, alloy b5/d federal specification single material response seat
Media For Which Designed
Steam 1st response
Media For Which Designed
Water, fresh 2nd response
Thread Series Designator
Npt all ends
NSN
4820-00-959-7299
Part Number
174A
Description
Valve,safety Relief
CAGE
79227

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 174A NSN 4820-00-959-7299

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:
12.5000lbs
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:
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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