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2640-339X2ASSYATL1 — VALVE,BALL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

2640-339X2ASSYATL1: VALVE,BALL.

The VALVE,BALL is a the manufacturer industrial component. Key specifications include bonnet_type: PACKING RETAINING, style_designator: STRAIGHT THRU, operating_pressure: 650.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, valve_operation_method: MANUAL, media_for_which_designed: WATER, SALT SINGLE RESPONSE, criticality_code_justification: ZZZY. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-027-3405, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
2640-339X2ASSYATL1
NSN: 4820-00-027-3405
FSC: 4820 — Valves, Nonpowered
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
bonnet_typePACKING RETAINING
style_designatorSTRAIGHT THRU
operating_pressure650.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
valve_operation_methodMANUAL
media_for_which_designedWATER, SALT SINGLE RESPONSE
criticality_code_justificationZZZY
nominal_pipe_size_accommodated4.000 INCHES FIRST END IN
reference_number_differentiating_characteristicsQUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
NSN4820-00-027-3405
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 2640-339X2ASSYATL1 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
NOMINAL PIPE SIZE ACCOMMODATED: 4.000 INCHES FIRST END IN
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
STYLE DESIGNATOR: STRAIGHT THRU
•
OPERATING PRESSURE: 650.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
BONNET TYPE: PACKING RETAINING
•
MEDIA FOR WHICH DESIGNED: WATER, SALT SINGLE RESPONSE
•
VALVE OPERATION METHOD: MANUAL
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
TECHNICAL CHARACTERISTICS
NOMINAL PIPE SIZE ACCOMMODATED4.000 INCHES FIRST END IN
CRITICALITY CODE JUSTIFICATIONZZZY
STYLE DESIGNATORSTRAIGHT THRU
OPERATING PRESSURE650.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
BONNET TYPEPACKING RETAINING
MEDIA FOR WHICH DESIGNEDWATER, SALT SINGLE RESPONSE
VALVE OPERATION METHODMANUAL
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSQUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS
OTHER ITEMS IN FSC 4820 — Valves, Nonpowered
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097 4820-00-001-0010 4820-00-001-0020 4820-00-001-0021 4820-00-001-0032 4820-00-001-0037 4820-00-001-0042 4820-00-001-1230
SUBSTITUTES & CROSS-REFERENCES 3
SS845-2050575ASSYATReference document
Same NSN cross-reference
Reference document — Design control — primary reference
2640-339X2ASSYATReference document
Same NSN cross-reference
Reference document — Secondary reference
SS845-2050575ASSYATL1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Demilitarization required — mutilation
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FREQUENTLY ASKED QUESTIONS
What is 2640-339X2ASSYATL1?
2640-339X2ASSYATL1 is a VALVE,BALL.
What parts can replace 2640-339X2ASSYATL1?
There are 3 known substitutes for 2640-339X2ASSYATL1: SS845-2050575ASSYAT, 2640-339X2ASSYAT, SS845-2050575ASSYATL1. Substitute compatibility should be verified for your specific system.
What is the NSN for 2640-339X2ASSYATL1?
2640-339X2ASSYATL1 is cataloged in the U.S. Government catalog under NSN 4820-00-027-3405. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.