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GSB11SNUMBER1 — SEAT,VALVE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

GSB11SNUMBER1: SEAT,VALVE.

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, overall_height: 0.625 INCHES NOMINAL IN, style_designator: PLAIN, seat_angle_in_deg: 35.000 MINIMUM AND 55.000 MAXIMUM, body_inside_diameter: 3.125 INCHES NOMINAL IN, body_outside_diameter: 3.882 INCHES MINIMUM AND 3.883 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-388-1948, 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
GSB11SNUMBER1
NSN: 4820-00-388-1948
FSC: 4820 — Valves, Nonpowered
CAGE: 14541 — COOPER MACHINERY SERVICES LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_height0.625 INCHES NOMINAL IN
style_designatorPLAIN
seat_angle_in_deg35.000 MINIMUM AND 55.000 MAXIMUM
body_inside_diameter3.125 INCHES NOMINAL IN
body_outside_diameter3.882 INCHES MINIMUM AND 3.883 INCHES MAXIMUM IN
seating_surface_shapeANGULAR
NSN4820-00-388-1948
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: GSB11SNUMBER1 · 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
•
BODY OUTSIDE DIAMETER: 3.882 INCHES MINIMUM AND 3.883 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: PLAIN
•
BODY INSIDE DIAMETER: 3.125 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
SEAT ANGLE IN DEG: 35.000 MINIMUM AND 55.000 MAXIMUM
•
SEATING SURFACE SHAPE: ANGULAR
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.625 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER3.882 INCHES MINIMUM AND 3.883 INCHES MAXIMUM IN
STYLE DESIGNATORPLAIN
BODY INSIDE DIAMETER3.125 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
SEAT ANGLE IN DEG35.000 MINIMUM AND 55.000 MAXIMUM
SEATING SURFACE SHAPEANGULAR
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 2
GSBA11CPC80Reference document
Same NSN cross-reference
Reference document — Secondary reference
GSBF11PC80Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GSB11SNUMBER1?
GSB11SNUMBER1 is a SEAT,VALVE.
What parts can replace GSB11SNUMBER1?
There are 2 known substitutes for GSB11SNUMBER1: GSBA11CPC80, GSBF11PC80. Substitute compatibility should be verified for your specific system.
What is the NSN for GSB11SNUMBER1?
GSB11SNUMBER1 is cataloged in the U.S. Government catalog under NSN 4820-00-388-1948. 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.