Model: F278-1228-1

Safety Relief Valve

Special Features:

Pop-off type

Properties:

Thread Direction
Right-hand all ends
Flow Control Device
Poppet
Maximum Operating Temp
-70.0 degrees fahrenheit 1st response
Maximum Operating Temp
450.0 degrees fahrenheit 2nd response
Connection Style
G46b plain (pipe) all ends
Valve Operation Method
Automatic
Connection Type
Threaded external pipe all ends
Maximum Operating Pressure
200.0 pounds per square inch single response
Thread Size
0.750 inches all ends
Opening Pressure Setting
25.0 pounds per square inch
Material
Copper alloy body
Material
Silicon seat
Media For Which Designed
Air 1st response
Media For Which Designed
Oil, chlorinated transformer 2nd response
Media For Which Designed
Oxygen, gaseous 3rd response
Style Designator
C4 straight thru
Thread Series Designator
Npt all ends
NSN
4820-01-212-6795
Part Number
F278-1228-1
Description
Valve,safety Relief
CAGE
04577

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 F278-1228-1 NSN 4820-01-212-6795

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

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
1.0000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

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: 8481400000
  • SITC: 74740
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Safety or relief valves

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