Model: 1970C

Safety Relief Valve

Properties:

Pipe Size Accommodated
1.000 inches 2nd end
Pipe Size Accommodated
1.500 inches 1st end
Thread Direction
Right-hand 2nd end
Thread Direction
Right-hand 1st end
Flow Control Device
Disk
Bonnet Type
Inside spring
Bonnet Attachment Method
Threaded
Disk Loading Method
Spring
Valve Discharge Flow Rate
90.0 gallons per minute
Maximum Operating Temp
400.0 degrees fahrenheit single response
Connection Style
G9 plain, optional en (pipe) 1st end
Connection Style
G9 plain, optional en (pipe) 2nd end
Valve Operation Method
Automatic
Connection Type
Threaded internal pipe 1st end
Connection Type
Threaded internal pipe 2nd end
Features Provided
Pressure tight outlet side
Thready Qty Per Inch (tpi)
11-1/2 1st end
Thready Qty Per Inch (tpi)
11-1/2 2nd end
Maximum Operating Pressure
3000.0 pounds per square inch single response
Thread Size
1.500 inches 1st end
Thread Size
1.000 inches 2nd end
Opening Pressure Setting
350.0 pounds per square inch
Material
Steel
Material Specification
66 federal standard single material response seat and aisi 304/sae 30304 assn standard single material response seat
Material Specification
66 federal standard single material response stem and aisi 414/sae 51414 assn standard single material response stem
Material Specification
66 federal standard single material response body and aisi 304/sae 30304 assn standard single material response body
Material Specification
66 federal standard single material response flow control device and aisi 304/sae 30304 assn standard single material response flow control device
Media For Which Designed
Water-oil-gas single response
Thread Series Designator
Npt 2nd end
Thread Series Designator
Npt 1st end
NSN
4820-00-814-1958
Part Number
1970C
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 1970C NSN 4820-00-814-1958

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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