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Technical Data Sheet
20197BS51SSL1 ✓ 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,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: STEEL COMP 303 STEM, connection_type: UNTHREADED INTERNAL PIPE ALL ENDS, connection_style: SOCKET ALL ENDS, style_designator: ANGLE, operating_pressure: 3450.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, disk_loading_method: SPRING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-408-2665, 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
20197BS51SSL1
NSN: 4820-01-408-2665
FSC: 4820
CAGE: 03950 — NAVAL INVENTORY CONTROL POINT MECHANICSBURG (USA)
SPECIFICATIONS
materialSTEEL COMP 303 STEM
connection_typeUNTHREADED INTERNAL PIPE ALL ENDS
connection_styleSOCKET ALL ENDS
style_designatorANGLE
operating_pressure3450.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodSPRING
flow_control_deviceDISK
maximum_operating_temp165.0 FAHRENHEIT SINGLE RESPONSE DEGF
valve_operation_methodAUTOMATIC OR MANUAL
adjustable_pressure_range+1401.0 TO 1800.0 POUNDS PER SQUARE INCH LBS
furnished_items_and_quantity2 TAILPIECE
criticality_code_justificationZZZY
NSN4820-01-408-2665
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 20197BS51SSL1 · 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: STEEL CORROSION RESISTING BODY
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582, TY 303 ASSN STD SINGLE MATERIAL RESPONSE SEAT
NOMINAL PIPE SIZE ACCOMMODATED: 0.500 INCHES ALL ENDS IN
FLOW CONTROL DEVICE: DISK
DISK LOADING METHOD: SPRING
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL CORROSION RESISTING BODY
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582, TY 303 ASSN STD SINGLE MATERIAL RESPONSE SEAT
MATERIALSTEEL CORROSION RESISTING FLOW CONTROL DEVICE
NOMINAL PIPE SIZE ACCOMMODATED0.500 INCHES ALL ENDS IN
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A351 ASSN STD SINGLE MATERIAL RESPONSE BODY
FLOW CONTROL DEVICEDISK
DISK LOADING METHODSPRING
MATERIALSTEEL COMP 303 SEAT
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582, TY 303 ASSN STD SINGLE MATERIAL RESPONSE STEM
CONNECTION TYPEUNTHREADED INTERNAL PIPE ALL ENDS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
20197BS51SSInterchangeable
interchangeable cross-reference
interchangeable
20197Interchangeable
interchangeable cross-reference
interchangeable
20497BS51Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20197BS51SSL1?
20197BS51SSL1 is a VALVE,SAFETY RELIEF.
What parts can replace 20197BS51SSL1?
There are 3 known substitutes for 20197BS51SSL1: 20197BS51SS, 20197, 20497BS51. Substitute compatibility should be verified for your specific system.
What is the NSN for 20197BS51SSL1?
20197BS51SSL1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-408-2665. This indicates validated use in U.S. government and defense supply chains.
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