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Technical Data Sheet
PartsTable / COMPONENT / 9Y611 IT 1
9Y611 IT 1 ✓ 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 BODY, flange_shape: ROUND WITH HOLES ALL ENDS, connection_type: FLANGE ALL ENDS, style_designator: STRAIGHT THRU FLANGED ENDS NOTE:TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY., nominal_thickness: 0.374 INCHES ALL ENDS IN, bolt_hole_quantity: 6 ALL ENDS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-350-0174, 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
9Y611 IT 1
NSN: 4820-01-350-0174
FSC: 4820
CAGE: 11083 — CATERPILLAR INC DIV CATERPILLAR DEFENSE (USA)
SPECIFICATIONS
materialSTEEL BODY
flange_shapeROUND WITH HOLES ALL ENDS
connection_typeFLANGE ALL ENDS
style_designatorSTRAIGHT THRU FLANGED ENDS NOTE:TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.
nominal_thickness0.374 INCHES ALL ENDS IN
bolt_hole_quantity6 ALL ENDS
flow_control_deviceDISK
valve_operation_methodAUTOMATIC
nominal_outside_diameter0.413 INCHES ALL ENDS IN
opening_pressure_setting1.0 POUNDS PER SQUARE INCH LBS
NSN4820-01-350-0174
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 9Y611 IT 1 · 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
•
NOMINAL OUTSIDE DIAMETER: 0.413 INCHES ALL ENDS IN
•
FLANGE SHAPE: ROUND WITH HOLES ALL ENDS
•
CONNECTION TYPE: FLANGE ALL ENDS
•
MATERIAL: STEEL BODY
•
BOLT HOLE QUANTITY: 6 ALL ENDS
•
VALVE OPERATION METHOD: AUTOMATIC
•
OPENING PRESSURE SETTING: 1.0 POUNDS PER SQUARE INCH LBS
•
STYLE DESIGNATOR: STRAIGHT THRU FLANGED ENDS NOTE:TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL OUTSIDE DIAMETER0.413 INCHES ALL ENDS IN
FLANGE SHAPEROUND WITH HOLES ALL ENDS
CONNECTION TYPEFLANGE ALL ENDS
MATERIALSTEEL BODY
BOLT HOLE QUANTITY6 ALL ENDS
VALVE OPERATION METHODAUTOMATIC
OPENING PRESSURE SETTING1.0 POUNDS PER SQUARE INCH LBS
STYLE DESIGNATORSTRAIGHT THRU FLANGED ENDS NOTE:TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.
NOMINAL THICKNESS0.374 INCHES ALL ENDS IN
FLOW CONTROL DEVICEDISK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
414020Interchangeable
interchangeable cross-reference
interchangeable
4ABInterchangeable
interchangeable cross-reference
interchangeable
8175384Interchangeable
interchangeable cross-reference
interchangeable
872291-14Interchangeable
interchangeable cross-reference
interchangeable
NE96Interchangeable
interchangeable cross-reference
interchangeable
PLGA3430010AInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 9Y611 IT 1?
9Y611 IT 1 is a VALVE,SAFETY RELIEF.
What parts can replace 9Y611 IT 1?
There are 7 known substitutes for 9Y611 IT 1: 414020, 4AB, 8175384 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 9Y611 IT 1?
9Y611 IT 1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-350-0174. 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: July 2026