Model: 1556HA

Safety Relief Valve

Special Features:

1st connection face to center line distance5.562 in. 2nd connection face to centerlinedistance 6.250 in.

Properties:

Flow Control Device
Disk
Bonnet Type
Exposed spring
Bonnet Attachment Method
Bolted
Disk Loading Method
Spring
Maximum Operating Temp
650.0 degrees fahrenheit single response
Valve Operation Method
Automatic
Flange Shape
Round 1st end
Connection Type
Flange 2nd end
Connection Type
Flange 1st end
Features Provided
Pressure tight outlet side
Maximum Operating Pressure
900.0 pounds per square inch single response
Opening Pressure Setting
900.0 pounds per square inch
Outside Diameter
7.000 inches 1st end
Outside 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 2nd end
Raised Face Height
0.625 inches 1st end
Raised Face Diameter
2.875 inches 1st end
Raised Face Diameter
5.000 inches 2nd end
Material
Steel body
Material
Stainless steel flow control device
Material
Stainless steel seat
Style Designator
Angle
NSN
4820-00-066-2359
Part Number
1556HA
Description
Valve,safety Relief
CAGE
02750

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 1556HA NSN 4820-00-066-2359

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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