Model: 657A

Fluid Pressure Regulating Valve

Special Features:

4 in nom size

Properties:

Body Material
Steel, corrosion resisting
Body Style
Straight thru
Stem Material
Steel, corrosion resisting
First End Connection Type
Plain face flange
First End Style Designator
Plain
First End Flange Shape Style
Round w/ bolt holes
Second End Relationship With First End
Identical
Seat Material
Steel, corrosion resisting
Flow Control Device
Disk, flat
Flow Control Device Material
Steel, corrosion resisting
End Connection Quantity
2
Renewable Seat Ring Type
Threaded
Outlet Pressure Range
+2.0/+13.0 pounds per square inch
Regulation Type
Manual single stage
Valve Stem Design
Double seat
Valve Loading Method
Dome
Maximum Inlet Pressure Rating
150.0 pounds per square inch
Filter
Not included
Tempurature Rating
750.0 degrees fahrenheit
NSN
4810-00-236-0431
Part Number
657A
Description
Valve,regulating,fluid Pressure
CAGE
22508

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 657A NSN 4810-00-236-0431

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:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.2000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
SPI No.:
SPI Rev.:
SPC Mkg:
LVL_A:
LVL_B:

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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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