Model: D4729

Safety Relief Valve

Special Features:

Bolt holes in flange to straddle centerlines

Properties:

Pipe Size Accommodated
1.500 inches 1st end
Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Bonnet Type
Exposed spring
Bonnet Attachment Method
Threaded
Disk Loading Method
Spring
Renewable Seat Ring Type
Threaded
Bolt Hole Quantity
4 2nd end
Maximum Operating Temp
425.0 degrees fahrenheit single response
Connection Style
G9 plain, optional en (pipe) 1st end
Connection Style
Plain, optional en (pipe) 1st end
Valve Operation Method
Automatic or manual
Flange Shape
Round with holes 2nd end
Connection Type
Flange 2nd end
Connection Type
Threaded internal pipe 1st end
Features Provided
Valve stem lock shield
Thready Qty Per Inch (tpi)
11-1/2 1st end
Adjustable Pressure Range
+7.0/+25.0 pounds per square inch
Maximum Operating Pressure
100.0 pounds per square inch single response
Thread Size
1.500 inches 1st end
Outside Diameter
4.500 inches 2nd end
Thickness
0.438 inches 2nd end
First Connection Face To Centerline Distance
3.062 inches
Bolt Hole Diameter
0.562 inches 2nd end
Second Connection Face To Centerline Distance
2.188 inches
Bolt Circle Diameter
3.375 inches 2nd end
Flange Face Design
Plain 2nd end
Material
Copper alloy body
Material
Nickel alloy seat
Material
Nickel alloy stem
Material
Nickel alloy flow control device
Media For Which Designed
Steam single response
Style Designator
Angle flanged ends
Thread Series Designator
Npt 1st end
NSN
4820-00-203-8030
Part Number
D4729
Description
Valve,safety Relief
CAGE
37239

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 D4729 NSN 4820-00-203-8030

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

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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