Model: HL4557PC97

Safety Relief Valve

Properties:

Pipe Size Accommodated
0.500 inches 2nd end
Pipe Size Accommodated
0.750 inches 1st end
Thread Direction
Right-hand 2nd end
Thread Direction
Right-hand 1st end
Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Threaded
Disk Loading Method
Spring
Renewable Seat Ring Type
Threaded
Maximum Operating Temp
150.0 degrees fahrenheit single response
Connection Style
G46b plain (pipe) 2nd end
Connection Style
G9 plain, optional en (pipe) 1st end
Connection Style
Plain (pipe) 2nd end
Connection Style
Plain, optional en (pipe) 1st end
Valve Operation Method
Automatic or manual
Connection Type
Threaded external pipe 2nd end
Connection Type
Threaded internal pipe 1st end
Features Provided
Valve stem lock shield and bonnet packing and pressure tight outlet side
Adjustable Pressure Range
+500.0/+700.0 pounds per square inch
Maximum Operating Pressure
1200.0 pounds per square inch single response
Thread Size
0.500 inches 2nd end
Thread Size
0.750 inches 1st end
Material
Copper alloy body
Material
Nickel alloy seat
Material
Stainless steel flow control device
Material
Steel stem
Media For Which Designed
Air 1st response
Media For Which Designed
Gas, natural 2nd response
Style Designator
Angle
Thread Series Designator
Npt 2nd end
Thread Series Designator
Npt 1st end
NSN
4820-00-287-2450
Part Number
HL4557PC97
Description
Valve,safety Relief
CAGE
93236

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 HL4557PC97 NSN 4820-00-287-2450

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:
3.5000lbs
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:
594
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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