Model: 257-280A

Fluid Pressure Regulating Valve

Special Features:

Scale unit of measure inscription: pounds per square inch; dial outside diameter: 2.5 in.; dial range 0.0 to 15.0 and 0.0 to 4000.0

Properties:

Body Material

Copper alloy

Body Style

Straight thru

Furnished Items

Automatic relief valve and inlet pressure gage and outlet pressure gage

Media For Which Designed

Nitrogen, gaseous

First End Connection Type

Threaded internal tube

Second End Connection Type

Threaded internal tube

Second End Style Designator

Plain

Second End Thread Size And Series/type Designator

9/16-18 unf

Second End Thread Class

Second End Thread Direction

Right-hand

Flow Control Device

Diaphragm

End Connection Quantity

Outlet Pressure Range

+0.0/+15.0 pounds per square inch

Regulation Type

1st stage automatic, 2nd stage manual

Manual Control Method

Tee handle

Valve Stem Design

Double seat

Valve Loading Method

Spring

Remote Actuation Method

Diaphragm

Maximum Inlet Pressure Rating

4000.0 pounds per square inch

Filter

Included

End Application

M1 tank family

NSN

4820-01-135-5064

Part Number

257-280A

Description

Valve,regulating,fluid Pressure

CAGE

00914

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 257-280A NSN 4820-01-135-5064

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

27565

FIIG:

A21100

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

7.3000lbs

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:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

061480

UFC:

34500

LTL:

77.5

LCL:

77.5

WCC:

658

TCC:

SHC:

ACC:

Instruments/Radio

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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