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Technical Data Sheet
PartsTable / COMPONENT / GY9
GY9 ✓ Verified by PartsTable
— · GATE VALVE
WHAT YOU NEED TO KNOW
Full open or full close only — never throttle Rising stem shows position visually
Throttling a gate valve erodes seats
PRODUCT OVERVIEW

The SEAT,VALVE is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, flange_diameter: 3.125 INCHES NOMINAL IN, style_designator: PLAIN FLANGED, seat_angle_in_deg: 45.000 NOMINAL, under_flange_height: 0.466 INCHES NOMINAL IN, body_inside_diameter: 2.125 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4810-00-214-2753, 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
GY9
NSN: 4810-00-214-2753
FSC: 4810
CAGE: 79218 — WATEROUS COMPANY (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
flange_diameter3.125 INCHES NOMINAL IN
style_designatorPLAIN FLANGED
seat_angle_in_deg45.000 NOMINAL
under_flange_height0.466 INCHES NOMINAL IN
body_inside_diameter2.125 INCHES NOMINAL IN
body_outside_diameter2.438 INCHES NOMINAL IN
seating_surface_shapeANGULAR
end_item_identificationVALVE MODEL 49B
flange_seat_to_disk_end_height0.750 INCHES NOMINAL IN
general_characteristics_item_descriptionBRIDGE AMPLIFIER INVERTER UNIT,SOLID STATE,TOTALLY INCLOSED,CONNECTORRECEPTACLE TERMINATION
NSN4810-00-214-2753
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: GY9 · 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
•
UNDER FLANGE HEIGHT: 0.466 INCHES NOMINAL IN
•
BODY OUTSIDE DIAMETER: 2.438 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 2.125 INCHES NOMINAL IN
•
SEATING SURFACE SHAPE: ANGULAR
•
STYLE DESIGNATOR: PLAIN FLANGED
•
SEAT ANGLE IN DEG: 45.000 NOMINAL
•
FLANGE SEAT TO DISK END HEIGHT: 0.750 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
UNDER FLANGE HEIGHT0.466 INCHES NOMINAL IN
BODY OUTSIDE DIAMETER2.438 INCHES NOMINAL IN
BODY INSIDE DIAMETER2.125 INCHES NOMINAL IN
SEATING SURFACE SHAPEANGULAR
STYLE DESIGNATORPLAIN FLANGED
END ITEM IDENTIFICATIONVALVE MODEL 49B
SEAT ANGLE IN DEG45.000 NOMINAL
FLANGE SEAT TO DISK END HEIGHT0.750 INCHES NOMINAL IN
FLANGE DIAMETER3.125 INCHES NOMINAL IN
MATERIALCOPPER ALLOY OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
01770-0066Interchangeable
interchangeable cross-reference
interchangeable
3BL01012Interchangeable
interchangeable cross-reference
interchangeable
201910Interchangeable
interchangeable cross-reference
interchangeable
BX-9434Interchangeable
interchangeable cross-reference
interchangeable
5975Interchangeable
interchangeable cross-reference
interchangeable
213307-4Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GY9?
GY9 is a SEAT,VALVE.
What parts can replace GY9?
There are 17 known substitutes for GY9: 01770-0066, 3BL01012, 201910 and 14 more. Substitute compatibility should be verified for your specific system.
Is GY9 still available?
GY9 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026