Model: 1856990

Safety Relief Valve

Properties:

Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Disk Loading Method
Spring
End Application
Used on auxiliary fluid tank 1890265-2 sperry marine system 03956 onboard 270 ft wmec coast guard vessels
Connection Style
G46b plain (pipe) 1st end
Valve Operation Method
Automatic
Connection Type
Threaded external pipe 1st end
Maximum Operating Pressure
3.0 pounds per square inch single response
Thread Size
0.750 inches 1st end
Material
Aluminum flow control device
Material
Steel body
Material
Steel seat
Media For Which Designed
Hydraulic fluid, petroleum base single response
Thread Series Designator
Npt 1st end
NSN
4820-01-105-4532
Part Number
1856990
Description
Valve,safety Relief
CAGE
03956

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 1856990 NSN 4820-01-105-4532

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

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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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