Model: 1426DUPLEX

Safety Relief Valve

Special Features:

Duplex valve, two safety valves mtd in onebody, 1st connection face to centerline distance9.000 in., 2nd connection face to centerlinedistance 6.625 in.

Properties:

Flow Control Device
Disk
Bonnet Type
Exposed spring
Bonnet Attachment Method
Bolted
Disk Loading Method
Spring
Valve Discharge Flow Rate
71616.0 pounds per hour
Bolt Hole Quantity
8 1st end
Bolt Hole Quantity
8 2nd end
Valve Operation Method
Automatic
Flange Shape
Round with holes 1st end
Flange Shape
Round with holes 2nd end
Connection Type
Flange 1st end
Connection Type
Flange 2nd end
Maximum Operating Pressure
550.0 pounds per square inch single response
Opening Pressure Setting
525.0 pounds per square inch
Outside Diameter
13.000 inches 1st end
Outside Diameter
9.000 inches 2nd end
Bolt Hole Diameter
0.750 inches 2nd end
Bolt Hole Diameter
1.125 inches 1st end
Bolt Circle Diameter
10.500 inches 1st end
Bolt Circle Diameter
7.500 inches 2nd end
Flange Face Design
Raised straight 1st end
Flange Face Design
Raised straight 2nd end
Raised Face Height
0.062 inches 1st end
Raised Face Height
0.062 inches 2nd end
Raised Face Diameter
6.188 inches 2nd end
Raised Face Diameter
7.312 inches 1st end
Material
Nickel alloy flow control device
Material
Nickel alloy seat
Material
Steel body
Material
Steel stem
Style Designator
Angle
NSN
4820-00-059-4678
Part Number
1426DUPLEX
Description
Valve,safety Relief
CAGE
16497

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 1426DUPLEX NSN 4820-00-059-4678

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

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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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