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S-21-INTERNAL#0319079 — Technical Data Sheet

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— · 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 MONITOR,AUDIO FREQUENCY is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC OVERALL, overall_height: 0.125 INCHES NOMINAL IN, style_designator: PLAIN, body_inside_diameter: 1.250 INCHES NOMINAL IN, body_outside_diameter: 1.750 INCHES NOMINAL IN, seating_surface_shape: FLAT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4810-00-325-3197, 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
S-21-INTERNAL#0319079
NSN: 4810-00-325-3197
FSC: 4810
CAGE: 78330 — SLOAN VALVE COMPANY (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC OVERALL
overall_height0.125 INCHES NOMINAL IN
style_designatorPLAIN
body_inside_diameter1.250 INCHES NOMINAL IN
body_outside_diameter1.750 INCHES NOMINAL IN
seating_surface_shapeFLAT
NSN4810-00-325-3197
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: S-21-INTERNAL#0319079 · 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 INSIDE DIAMETER: 1.250 INCHES NOMINAL IN
•
SEATING SURFACE SHAPE: FLAT
•
STYLE DESIGNATOR: PLAIN
•
BODY OUTSIDE DIAMETER: 1.750 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC OVERALL
TECHNICAL CHARACTERISTICS
BODY INSIDE DIAMETER1.250 INCHES NOMINAL IN
OVERALL HEIGHT0.125 INCHES NOMINAL IN
SEATING SURFACE SHAPEFLAT
STYLE DESIGNATORPLAIN
BODY OUTSIDE DIAMETER1.750 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
S21InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
521InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
00H581TYPE3CLASS1STYLEBSIZECS41InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
B107.2 CL1STAInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
B107.110InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
B107.2 TY1CL1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S-21-INTERNAL#0319079?
S-21-INTERNAL#0319079 is a MONITOR,AUDIO FREQUENCY.
What parts can replace S-21-INTERNAL#0319079?
There are 18 known substitutes for S-21-INTERNAL#0319079: S21, 521, 00H581TYPE3CLASS1STYLEBSIZECS41 and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for S-21-INTERNAL#0319079?
S-21-INTERNAL#0319079 is cataloged in the Federal Logistics Information System under NSN 4810-00-325-3197. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026