Model: 4-1750-78

Fluid Pressure Regulating Valve

Properties:

Body Material
Aluminum alloy
Body Style
Tee
Stem Material
Steel, corrosion resisting
Media For Which Designed
Air and hydrocarbon fuels and oils
First End Connection Type
Threaded external tube
First End Style Designator
Flared
First End Outside Diameter Tube Accommodated
0.500 inches
First End Thread Size And Series/type Designator
3/4-16 unjf
First End Thread Class
3a
First End Thread Direction
Right-hand
Second End Relationship With First End
Not identical
Second End Connection Type
Threaded internal boss
Second End Style Designator
Gasket seal
Second End Thread Size And Series/type Designator
7/16-20 unjf
Second End Thread Class
3b
Second End Thread Direction
Right-hand
Third End Relationship With Preceding Ends
Identical with second end
Seat Material
Steel, corrosion resisting
First End Seat Angle In Deg
37.0
Flow Control Device
Diaphragm
End Connection Quantity
3
Regulation Type
Automatic single stage
Valve Loading Method
Spring
Remote Actuation Method
Diaphragm
Maximum Inlet Pressure Rating
85.0 pounds per square inch
Filter
Not included
Tempurature Rating
Between -65.0 degrees celsius and 250.0 degrees celsius
Fsc Application Data
Pneumatic system, aircraft
NSN
4820-00-037-2951
Part Number
4-1750-78
Description
Valve,regulating,fluid Pressure
CAGE
45681

A valve designed to automatically maintain within close limits a predetermined outlet pressure which may be adjustable within a specified range regardless of the higher fluctuating or constant inlet pressure. It is designed for use with compressed gas(es) and various liquids and may include gauges. It may be inline or cartridge (manifold) design. Excludes regulator, pressure, medical gas administration apparatus; regulator, oxygen, barometric continuous flow; regulator, oxygen demand; regulator, oxygen diluter demand; and valve(1), fluid pressure regulating, aircraft.

Part 4-1750-78 NSN 4820-00-037-2951

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
27565
FIIG:
A21100
Concept No.:
1
App. Key:
D
Cond. Code:
2
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:
LA
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:
Z
ACC:
Equipment for Aircraft

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Schedule B and Export
  • Schedule B: 8481809015
  • SITC: 74780
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Regulator valves, self-operating, for controlling variables such as temperature, pressure, flow and liquid level

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