Model: 257-280

Fluid Pressure Regulating Valve

Properties:

Body Material
Brass
Outside Surface Treatment
Any acceptable
Body Style
Straight thru
Stem Material
Bronze
Furnished Items
Adapter and automatic relief valve and inlet pressure gage and outlet pressure gage
Media For Which Designed
Nitrogen, gaseous
First End Connection Type
Threaded internal pipe
First End Style Designator
Plain
First End Thread Size And Series/type Designator
1/4-18 npt
First End Thread Direction
Right-hand
Second End Relationship With First End
Not identical
Second End Connection Type
Threaded external pipe
Second End Style Designator
Plain
Second End Thread Size And Series/type Designator
1/4-18 npt
Second End Thread Direction
Right-hand
Seat Material
Bronze
Flow Control Device
Disk
Flow Control Device Material
Bronze
End Connection Quantity
2
Outlet Pressure Range
+0.0/+40.0 pounds per square inch
Outlet Pressure Range
+0.0 to 40.0 pounds per square inch
Regulation Type
1st stage automatic, 2nd stage manual
Manual Control Method
Knob
Valve Stem Design
Double seat
Valve Loading Method
Spring
Maximum Inlet Pressure Rating
2500.0 pounds per square inch
Outlet Pressure Accuracy Rating
Not rated
Filter
Not included
NSN
4820-00-724-9744
Part Number
257-280
Description
Valve,regulating,fluid Pressure
CAGE
18075

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 257-280 NSN 4820-00-724-9744

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:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
4.5000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
SPI No.:
SPI Rev.:
SPC Mkg:
99
LVL_A:
G
LVL_B:
R

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: 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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