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Technical Data Sheet
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S3158 ✓ 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

RESISTOR,VARIABLE,WIRE WOUND,PRE. Key specifications include material: COPPER ALLOY BODY, special_features: USED ON SOOT BLOWERS FOR FIRE TUBE AND WATER TUBE BLOWERS, seating_surface_shape: O-RING. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4810-00-383-7994, 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
S3158
NSN: 4810-00-383-7994
FSC: 4810
CAGE: 06245 — BAYER CO THE (USA)
SPECIFICATIONS
materialCOPPER ALLOY BODY
special_featuresUSED ON SOOT BLOWERS FOR FIRE TUBE AND WATER TUBE BLOWERS
seating_surface_shapeO-RING
NSN4810-00-383-7994
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: S3158 · 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
•
MATERIAL: COPPER ALLOY BODY
•
SEATING SURFACE SHAPE: O-RING
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY BODY
SEATING SURFACE SHAPEO-RING
SPECIAL FEATURESUSED ON SOOT BLOWERS FOR FIRE TUBE AND WATER TUBE BLOWERS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
985768Interchangeable
interchangeable cross-reference
interchangeable
R-9Interchangeable
interchangeable cross-reference
interchangeable
6750Interchangeable
interchangeable cross-reference
interchangeable
R900Interchangeable
interchangeable cross-reference
interchangeable
376 373 R91Interchangeable
interchangeable cross-reference
interchangeable
PT-135Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is S3158?
S3158 is a RESISTOR,VARIABLE,WIRE WOUND,PRE.
What parts can replace S3158?
There are 23 known substitutes for S3158: 985768, R-9, 6750 and 20 more. Substitute compatibility should be verified for your specific system.
Is S3158 still available?
S3158 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