Model: B522-1-B1

Stop-check Valve

Special Features:

Valve size 0.750 in.

Properties:

Pipe Size Accommodated
0.750 inches all ends
Flow Control Device
Disk
Bonnet Type
Outside screw-yoke
Bonnet Attachment Method
Bolted
Maximum Operating Temp
775.0 degrees fahrenheit single response
Connection Style
Socket (pipe) all ends
Valve Operation Method
Manual
Connection Type
Unthreaded internal pipe all ends
Mounting Position
Horizontal
Features Provided
Bonnet packing
Maximum Operating Pressure
1500.0 pounds per square inch single response
Material
Steel body
Material
Stainless steel stem
Material
Steel flow control device
Material
Steel seat
Material Specification
Astm a105, grade 2 assn standard single material response body
Material Specification
Mil-r-17131, mil-rcocr-a military specification single material response flow control device
Material Specification
Mil-r-17131, mil-rcocr-a military specification single material response seat
Media For Which Designed
Steam single response
Style Designator
Straight thru
NSN
4820-00-431-8321
Part Number
B522-1-B1
Description
Valve,stop-check
CAGE
11859

A valve with a bolt or stem that may be mechanically actuated to two different positions by rotary or linear motion. In the first position, the valve disk is located and locked against the seat permitting no fluid flow through the valve. In the second position, one side of the valve disk is located against the seat permitting movement of the disk in a manner that will allow a flow of fluid in one direction through the valve. The valve disk may be spring loaded. It may be inline or cartridge (manifold) design. See also valve (1), lift-check and valve (1), stop-lift-check.

Part B522-1-B1 NSN 4820-00-431-8321

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
05486
FIIG:
A530B0
Concept No.:
1
App. Key:
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:
S

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:
M
SPI No.:
0395010011
SPI Rev.:
F
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
051080
UFC:
29300
LTL:
RATING VARIABLE
LCL:
--
WCC:
576
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 8481302090
  • SITC: 74730
  • End Use: Industrial machines, other
  • NAICS: 332911
  • USDA: 1

Freight Class: Check valves of steel

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