Model: R51

Safety Relief Valve

Properties:

Pipe Size Accommodated
0.500 inches 2nd end
Thread Class
3a 1st end
Thread Direction
Right-hand 2nd end
Thread Direction
Right-hand 1st end
Flow Control Device
Ball
Disk Loading Method
Spring
Connection Style
G42 flared (tube) 1st end
Connection Style
G46b plain (pipe) 2nd end
Connection Style
Flared (tube) 1st end
Connection Style
Plain (pipe) 2nd end
Valve Operation Method
Automatic
Connection Type
Threaded external pipe 2nd end
Connection Type
Threaded external tube 1st end
Features Provided
Pressure tight outlet side
Adjustable Pressure Range
+100.0/+500.0 pounds per square inch
Adjustable Pressure Range
+100.0 to 500.0 pounds per square inch
Maximum Operating Pressure
235.0 pounds per square inch single response
Thread Size
0.500 inches 2nd end
Thread Size
0.875 inches 1st end
Seat Angle
45.0 degrees 1st end
Outside Diameter Tube Accommodated
0.625 inches 1st end
Material
Copper alloy
Media For Which Designed
Sulphur dioxide, gaseous single response
Thread Series Designator
Nptf 2nd end
Thread Series Designator
Unf 1st end
NSN
4820-00-142-1523
Part Number
R51
Description
Valve,safety Relief
CAGE
33334

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 R51 NSN 4820-00-142-1523

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:
U
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:
576
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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