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204190B — CARTRIDGE,DEHYDRATOR

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

204190B: CARTRIDGE,DEHYDRATOR.

The CARTRIDGE,DEHYDRATOR is a the manufacturer industrial component. Key specifications include material: STEEL CORROSION RESISTING OVERALL, thread_class: 2A SINGLE THREADED PORTION A, thread_length: 0.250 INCHES NOMINAL SINGLE THREADED PORTION IN, flange_diameter: 1.625 INCHES NOMINAL IN, style_designator: THREADED FLANGED, seat_angle_in_deg: 45.000 NOMINAL. This part is cataloged in the U.S.

Government catalog under NSN 4820-01-094-2808, 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
204190B
NSN: 4820-01-094-2808
FSC: 4820 — Valves, Nonpowered
CAGE: 58529 — THE BABCOCK & WILCOX COMPANY DBA B & W SERVICE CO DIV B&W SERVICE COMPANY (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING OVERALL
thread_class2A SINGLE THREADED PORTION A
thread_length0.250 INCHES NOMINAL SINGLE THREADED PORTION IN
flange_diameter1.625 INCHES NOMINAL IN
style_designatorTHREADED FLANGED
seat_angle_in_deg45.000 NOMINAL
nominal_thread_size1.375 INCHES SINGLE THREADED PORTION IN
under_flange_height0.335 INCHES NOMINAL IN
seating_surface_shapeANGULAR
thread_quantity_per_inch16 SINGLE THREADED PORTION
thread_series_designatorUN SINGLE THREADED PORTION
body_stepped_inside_diameter0.750 INCHES NOMINAL SECOND STEP IN
NSN4820-01-094-2808
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 204190B · 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: 0.250 INCHES NOMINAL IN
•
FLANGE DIAMETER: 1.625 INCHES NOMINAL IN
•
THREAD LENGTH: 0.250 INCHES NOMINAL SINGLE THREADED PORTION IN
•
BODY STEPPED INSIDE DIAMETER: 0.750 INCHES NOMINAL SECOND STEP IN
•
STYLE DESIGNATOR: THREADED FLANGED
•
NOMINAL THREAD SIZE: 1.375 INCHES SINGLE THREADED PORTION IN
•
UNDER FLANGE HEIGHT: 0.335 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE SEAT TO DISK END HEIGHT0.250 INCHES NOMINAL IN
FLANGE DIAMETER1.625 INCHES NOMINAL IN
THREAD LENGTH0.250 INCHES NOMINAL SINGLE THREADED PORTION IN
BODY STEPPED INSIDE DIAMETER0.750 INCHES NOMINAL SECOND STEP IN
BODY STEPPED INSIDE DIAMETER1.000 INCHES NOMINAL FIRST STEP IN
STYLE DESIGNATORTHREADED FLANGED
NOMINAL THREAD SIZE1.375 INCHES SINGLE THREADED PORTION IN
UNDER FLANGE HEIGHT0.335 INCHES NOMINAL IN
THREAD CLASS2A SINGLE THREADED PORTION A
THREAD QUANTITY PER INCH16 SINGLE THREADED PORTION
SUBSTITUTES & CROSS-REFERENCES 3
7800235Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
1039-81Reference document
Same NSN cross-reference
Reference document — Secondary reference
CS-4820-SV-0755Reference document
Same NSN cross-reference
Reference document — Drawing number reference only
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 204190B?
204190B is a CARTRIDGE,DEHYDRATOR.
What parts can replace 204190B?
There are 3 known substitutes for 204190B: 7800235, 1039-81, CS-4820-SV-0755. Substitute compatibility should be verified for your specific system.
What is the NSN for 204190B?
204190B is cataloged in the U.S. Government catalog under NSN 4820-01-094-2808. 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.