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SP1898 — 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

DIAPHRAGM,ACTUATOR VALVE,SPECIAL. Key specifications include material: RUBBER SYNTHETIC, overall_height: 0.442 INCHES NOMINAL IN, shank_diameter: 0.688 INCHES NOMINAL IN, outside_diameter: 1.750 INCHES NOMINAL IN, style_designator: SPECIAL SHAPED. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System under NSN 4820-00-652-5138, 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
SP1898
NSN: 4820-00-652-5138
FSC: 4820
CAGE: 35311 — AMERICAN STANDARD INC WESTINGHOUSE AIR BRAKE CO DIV (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC
overall_height0.442 INCHES NOMINAL IN
shank_diameter0.688 INCHES NOMINAL IN
outside_diameter1.750 INCHES NOMINAL IN
style_designatorSPECIAL SHAPED
NSN4820-00-652-5138
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: SP1898 · 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
•
STYLE DESIGNATOR: SPECIAL SHAPED
•
SHANK DIAMETER: 0.688 INCHES NOMINAL IN
•
OUTSIDE DIAMETER: 1.750 INCHES NOMINAL IN
•
MATERIAL: RUBBER SYNTHETIC
TECHNICAL CHARACTERISTICS
OVERALL HEIGHT0.442 INCHES NOMINAL IN
STYLE DESIGNATORSPECIAL SHAPED
SHANK DIAMETER0.688 INCHES NOMINAL IN
OUTSIDE DIAMETER1.750 INCHES NOMINAL IN
MATERIALRUBBER SYNTHETIC
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
MIL-R-55182/1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
MIS-17235/1-303InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
109136InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
7519-10InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
755002A7671-10InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
71958InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVEGOVERNMENT REGISTRY
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SP1898?
SP1898 is a DIAPHRAGM,ACTUATOR VALVE,SPECIAL.
What parts can replace SP1898?
There are 10 known substitutes for SP1898: MIL-R-55182/1, MIS-17235/1-303, 109136 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SP1898?
SP1898 is cataloged in the Federal Logistics Information System under NSN 4820-00-652-5138. 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: October 2026