Model: 277WS1 1-4

Check Valve

Properties:

Pipe Size Accommodated
1.250 inches all ends
Flow Control Device
Disk
Disk Loading Method
Weight
Renewable Seat Ring Type
Threaded
Maximum Operating Temp
550.0 degrees fahrenheit single response
Connection Style
Socket with brazing ring (pipe) all ends
Valve Operation Method
Automatic
Connection Type
Unthreaded internal pipe all ends
Mounting Position
Horizontal
Maximum Operating Pressure
300.0 pounds per square inch 1st response
Maximum Operating Pressure
700.0 pounds per square inch 2nd response
Material
Copper alloy 922 body
Material
Copper alloy 922 stem
Material
Nickel alloy seat
Material
Nickel alloy flow control device
Material Specification
Qq-c-390, alloy d4 federal specification single material response body
Material Specification
Qq-c-390, alloy d4 federal specification single material response stem
Media For Which Designed
Steam 1st response
Media For Which Designed
Water-oil-gas 2nd response
Style Designator
Straight thru
NSN
4820-00-202-9798
Part Number
277WS1 1-4
Description
Valve,check
CAGE
63686

A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.

Part 277WS1 1-4 NSN 4820-00-202-9798

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05487
FIIG:
A530B0
Concept No.:
1
App. Key:
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:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
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:
050855
UFC:
29290
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8481301090
  • SITC: 74730
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Check valves of copper having a pressure rating of 850 kpa or over

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