Model: 20261L51M

Safety Relief Valve

Properties:

Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Bolted
Disk Loading Method
Spring
Valve Discharge Flow Rate
3168.0 cubic feet per minute
Renewable Seat Ring Type
Threaded
Maximum Operating Temp
165.0 degrees fahrenheit single response
End Application
Seawolf class ssn
Valve Operation Method
Automatic or manual
Adjustable Pressure Range
+76.0/+90.0 pounds per square inch
Maximum Operating Pressure
90.0 pounds per square inch single response
Opening Pressure Setting
90.0 pounds per square inch
Part Name Assigned By Controlling Agency
2.5 in. Relief valve type 1751-t
Material
Bronze body
Material
Nickel alloy seat
Material
Nickel alloy 400 flow control device
Material
Nickel alloy 400 stem
Material Specification
Astm-b61 assn standard single material response body
Material Specification
Qq-n-281 cl. A or b federal specification single material response stem
Material Specification
Qq-n-281 cl.A federal specification single material response flow control device
Material Specification
Qq-n-288 cl.A federal specification single material response seat
Media For Which Designed
Air single response
Style Designator
C1 angle
Specification Data
81349-mil-v-22549 government specification
NSN
4820-01-504-6111
Part Number
20261L51M
Description
Valve,safety Relief
CAGE
01343

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 20261L51M NSN 4820-01-504-6111

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:
--
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:
Trailers/Vehicles

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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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