4820-01-220-6635

Find complete technical information, availability, and procurement data for: 4820-01-220-6635
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Federal Supply Group

Valves

Federal Supply Classification

4820 Nonpowered Valves

National Stock Number

4820-01-220-6635

Item Name Code

05493

Assigment Date

11/16/1985 (40 years ago)

An item designed to automatically relieve vacuum, by the intake of air, when the internal pressure falls below atmospheric pressure. See also valve, vacuum regulating.

300.0 fahrenheit temp rating, "angle give "adqm" or "adqn" if flanged one or two ends" body style, flared first end style designator, threaded external tube first end connection type, refrigerant r-502 media for which designed

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Body Style: "angle give "adqm" or "adqn" if flanged one or two ends"
Temp Rating: 300.0 fahrenheit
Media For Which Designed: refrigerant r-502
First End Connection Type: threaded external tube
First End Style Designator: flared
First End Outside Diameter Tube Accommodated: 0.375 inches nominal
First End Thread Class: 3a
First End Thread Direction: right-hand
Second End Relationship With First End: not identical
Second End Connection Type: threaded external tube
Second End Style Designator: flared
Second End Outside Diameter Tube Accommodated: 0.250 inches nominal
Second End Thread Class: 3a
Second End Thread Direction: right-hand
First End Seat Angle In Deg: 37.0
Second End Seat Angle In Deg: 37.0
Flow Control Device: poppet
End Connection Quantity: 2
Capillary Tube Length: 60.000 inches nominal
Bulb Length: 3.500 inches nominal
Bulb Diameter: 0.500 inches nominal
Valve Expansion Control Type: thermostatic
Valve Evaporator Temp Range Designation: low
Valve Pressure Limiting Device: included
Valve Pressure Limiting Device Setting: 35.0 pounds per square inch gage
Valve Pressure Limiting Device Range: +0.0 to 35.0 pounds per square inch gage
Bulb Media Type: any acceptable
Valve Equalizer Location: external
Valve Equalizer Connection Type: flared tube
Valve Equalizer Connection Diameter: 0.250 inches nominal
Refrigeration Capacity In Btu Per Hour: 3.0
Material: copper alloy body

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
HCE1-4RW35	Expansion Valve

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 4820-01-220-6635?

The FSCG of the NSN 4820-01-220-6635 is 4820

Does the NSN 4820-01-220-6635 have a Schedule B code assigned?

Yes, the Schedule B code is 8481809050

Does NSN 4820-01-220-6635 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 4820-01-220-6635 contain precious materials?

Item does not contain precious metal.

Does NSN 4820-01-220-6635 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 4820-01-220-6635 was assigned to the Federal Catalog?

It was assigned 40 years ago, on Sat, Nov 16, 1985