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003009G73-1 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

003009G73-1: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, seat_radius: 0.180 INCHES NOMINAL IN, flange_diameter: 4.125 INCHES MINIMUM AND 4.126 INCHES MAXIMUM IN, style_designator: PLAIN FLANGED, under_flange_height: 1.720 INCHES NOMINAL IN, body_inside_diameter: 1.500 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-029-9974, 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
003009G73-1
NSN: 4820-01-029-9974
FSC: 4820 — Valves, Nonpowered
CAGE: 0BR59 — SIEMENS GOVERNMENT TECHNOLOGIES, INC. DBA SGT DRESSER-RAND DIV SGT DRESSER-RAND (USA)
SPECIFICATIONS
materialSTEEL OVERALL
seat_radius0.180 INCHES NOMINAL IN
flange_diameter4.125 INCHES MINIMUM AND 4.126 INCHES MAXIMUM IN
style_designatorPLAIN FLANGED
under_flange_height1.720 INCHES NOMINAL IN
body_inside_diameter1.500 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN
body_outside_diameter3.180 INCHES NOMINAL IN
seating_surface_shapeRADIAL
flange_seat_to_disk_end_height1.855 INCHES MINIMUM AND 1.865 INCHES MAXIMUM IN
material_document_and_classificationQQ-S-763,CL 410,COND T FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN4820-01-029-9974
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 003009G73-1 · 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
•
FLANGE SEAT TO DISK END HEIGHT: 1.855 INCHES MINIMUM AND 1.865 INCHES MAXIMUM IN
•
FLANGE DIAMETER: 4.125 INCHES MINIMUM AND 4.126 INCHES MAXIMUM IN
•
BODY OUTSIDE DIAMETER: 3.180 INCHES NOMINAL IN
•
STYLE DESIGNATOR: PLAIN FLANGED
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-763,CL 410,COND T FED SPEC SINGLE MATERIAL RESPONSE OVERALL
•
BODY INSIDE DIAMETER: 1.500 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN
•
SEAT RADIUS: 0.180 INCHES NOMINAL IN
•
UNDER FLANGE HEIGHT: 1.720 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT1.855 INCHES MINIMUM AND 1.865 INCHES MAXIMUM IN
FLANGE DIAMETER4.125 INCHES MINIMUM AND 4.126 INCHES MAXIMUM IN
BODY OUTSIDE DIAMETER3.180 INCHES NOMINAL IN
STYLE DESIGNATORPLAIN FLANGED
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,CL 410,COND T FED SPEC SINGLE MATERIAL RESPONSE OVERALL
BODY INSIDE DIAMETER1.500 INCHES MINIMUM AND 1.510 INCHES MAXIMUM IN
SEAT RADIUS0.180 INCHES NOMINAL IN
UNDER FLANGE HEIGHT1.720 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SEATING SURFACE SHAPERADIAL
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 4
6021328-001Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
3009G73 PIECE 1Reference document
Same NSN cross-reference
Reference document — Secondary reference
781E733P41Reference document
Same NSN cross-reference
Reference document — Secondary reference
3009G73-001Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 003009G73-1?
003009G73-1 is a SEAT,VALVE.
What parts can replace 003009G73-1?
There are 4 known substitutes for 003009G73-1: 6021328-001, 3009G73 PIECE 1, 781E733P41 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 003009G73-1?
003009G73-1 is cataloged in the U.S. Government catalog under NSN 4820-01-029-9974. 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.