4820-00-068-8991
Find complete technical information, availability, and procurement data for: 4820-00-068-8991
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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.
packing retaining bonnet type, right-hand 1st end thread direction, 3b 1st end thread class, spring disk loading method, poppet flow control device
Product Characteristics
Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.
- Thread Class
- 3b 1st end
- Thread Direction
- right-hand 1st end
- Flow Control Device
- poppet
- Bonnet Type
- packing retaining
- Disk Loading Method
- spring
- Valve Discharge Flow Rate
- 4.0 cubic feet per minute
- Maximum Operating Temp
- -65.0 fahrenheit 1st response
- Maximum Operating Temp
- 275.0 fahrenheit 2nd response
- Connection Style
- gasket seal(boss) 1st end
- Valve Operation Method
- automatic
- Connection Type
- threaded internal boss 1st end
- Features Provided
- pressure tight outlet side
- Adjustable Pressure Range
- +49.0 to 51.0 pounds per square inch
- Maximum Operating Pressure
- 50.0 pounds per square inch single response
- Nominal Thread Size
- 0.562 inches 1st end
- Material
- aluminum alloy overall
- Media For Which Designed
- hydraulic fluid, phosphate-ester base single response
- Surface Treatment
- anodize
- Style Designator
- straight thru
- Thread Series Designator
- unjf 1st end
Replaces National Stock Numbers
Below is a list of NSNs that have been officially superseded by this NSN:
| NSN | Name | Date |
|---|---|---|
| 1650-00-083-1240 | No Name Available | 01/01/1960 |
Related Parts
This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:
| Part Number | Name |
|---|---|
| 128SCH107-1 | Safety Relief Valve |
| MC1665 | Safety Relief Valve |
FAQs
Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.
What is the FSCG of the NSN 4820-00-068-8991?
Does the NSN 4820-00-068-8991 have a Schedule B code assigned?
Does NSN 4820-00-068-8991 require demilitarization?
Does NSN 4820-00-068-8991 contain precious materials?
Does NSN 4820-00-068-8991 contain hazardous materials?
When the NSN 4820-00-068-8991 was assigned to the Federal Catalog?
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