Model: 1856M-OL 1/2IN

Safety Relief Valve

Properties:

Thread Direction
Right-hand all ends
Flow Control Device
Disk
Bonnet Type
Inside screw
Bonnet Attachment Method
Threaded
Disk Loading Method
Spring
Maximum Operating Temp
450.0 degrees fahrenheit single response
Connection Style
G46b plain (pipe) 1st end
Connection Style
G9 plain, optional en (pipe) 2nd end
Valve Operation Method
Automatic or manual
Connection Type
Threaded external pipe 1st end
Connection Type
Threaded internal pipe 2nd end
Thread Size
0.500 inches 1st end
Thread Size
0.750 inches 2nd end
Opening Pressure Setting
300.0 pounds per square inch
Material
Copper alloy 360 body or copper alloy 922 body
Material
Copper alloy 360 flow control device
Material
Copper alloy 360 stem
Media For Which Designed
Steam single response
Thread Series Designator
Npt all ends
NSN
4820-01-299-4011
Part Number
1856M-OL 1/2IN
Description
Valve,safety Relief
CAGE
72352

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 1856M-OL 1/2IN NSN 4820-01-299-4011

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:
CRITL:
X

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:
Trailers/Vehicles

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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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