PartsTable
Technical Data Sheet
SS845-2181251AS ✓ 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 VALVE,CHECK is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY 903 AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE, valve_size: 5.000 INCHES IN, flange_shape: ROUND WITH HOLES ALL ENDS, connection_type: FLANGE ALL ENDS, style_designator: STRAIGHT THRU FLANGED ENDS, mounting_position: HORIZONTAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-063-0053, 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
SS845-2181251AS
NSN: 4820-01-063-0053
FSC: 4820
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
materialCOPPER ALLOY 903 AND RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE
valve_size5.000 INCHES IN
flange_shapeROUND WITH HOLES ALL ENDS
connection_typeFLANGE ALL ENDS
style_designatorSTRAIGHT THRU FLANGED ENDS
mounting_positionHORIZONTAL
nominal_thickness1.625 INCHES ALL ENDS IN
bolt_hole_quantity12 ALL ENDS
flange_face_designPLAIN ALL ENDS
operating_pressure700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodWEIGHT
flow_control_deviceDISK
NSN4820-01-063-0053
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: SS845-2181251AS · 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 DOCUMENT AND CLASSIFICATION: MIL-B-21230 MIL SPEC SINGLE MATERIAL RESPONSE BODY
VALVE OPERATION METHOD: AUTOMATIC
BOLT HOLE QUANTITY: 12 ALL ENDS
FLANGE SHAPE: ROUND WITH HOLES ALL ENDS
MAXIMUM OPERATING TEMP: 160.0 FAHRENHEIT SINGLE RESPONSE DEGF
CONNECTION TYPE: FLANGE ALL ENDS
MATERIAL: COPPER ALLOY BODY
TECHNICAL CHARACTERISTICS (FLIS)
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-21230 MIL SPEC SINGLE MATERIAL RESPONSE BODY
VALVE OPERATION METHODAUTOMATIC
BOLT HOLE QUANTITY12 ALL ENDS
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-21230 MIL SPEC SINGLE MATERIAL RESPONSE SEAT
FLANGE SHAPEROUND WITH HOLES ALL ENDS
MAXIMUM OPERATING TEMP160.0 FAHRENHEIT SINGLE RESPONSE DEGF
CONNECTION TYPEFLANGE ALL ENDS
MATERIALCOPPER ALLOY BODY
NOMINAL THICKNESS1.625 INCHES ALL ENDS IN
OPERATING PRESSURE700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
S2471Interchangeable
interchangeable cross-reference
interchangeable
2620-927X11PC25Interchangeable
interchangeable cross-reference
interchangeable
SS845-2181251ASSYRE6INInterchangeable
interchangeable cross-reference
interchangeable
2620-927X9ASSYRE6INInterchangeable
interchangeable cross-reference
interchangeable
2181251ASSYRE6INInterchangeable
interchangeable cross-reference
interchangeable
2620-927X9 ASSEMBLY A 2 1/2INInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SS845-2181251AS?
SS845-2181251AS is a VALVE,CHECK.
What parts can replace SS845-2181251AS?
There are 18 known substitutes for SS845-2181251AS: S2471, 2620-927X11PC25, SS845-2181251ASSYRE6IN and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SS845-2181251AS?
SS845-2181251AS is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-063-0053. This indicates validated use in U.S. government and defense supply chains.
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