PartsTable
Technical Data Sheet
851-1IN ✓ 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

PAN AND TILT ASSEMBLY,THERMAL VI. Key specifications include material: STEEL UNS K03504 BODY, bonnet_type: INSIDE SCREW, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN,OPTIONAL END(PIPE) ALL ENDS, special_features: LOOSE DISC; INTEGRAL HARD FACED SEAT; CONVENTIONAL PORT CHROME TRIM, style_designator: STRAIGHT THRU. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-262-2541, 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
851-1IN
NSN: 4820-01-262-2541
FSC: 4820
CAGE: 63220 — FLOWSERVE INC (USA)
SPECIFICATIONS
materialSTEEL UNS K03504 BODY
bonnet_typeINSIDE SCREW
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN,OPTIONAL END(PIPE) ALL ENDS
special_featuresLOOSE DISC; INTEGRAL HARD FACED SEAT; CONVENTIONAL PORT CHROME TRIM
style_designatorSTRAIGHT THRU
thread_directionRIGHT-HAND ALL ENDS
operating_pressure235.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS
flow_control_deviceDISK
nominal_thread_size1.000 INCHES ALL ENDS IN
maximum_operating_temp1000.0 FAHRENHEIT FIRST RESPONSE DEGF
valve_operation_methodMANUAL
NSN4820-01-262-2541
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 851-1IN · 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
THREAD DIRECTION: RIGHT-HAND ALL ENDS
THREAD SERIES DESIGNATOR: NPT ALL ENDS
BONNET ATTACHMENT METHOD: UNION
MATERIAL: STEEL UNS K03504 BODY
NOMINAL THREAD SIZE: 1.000 INCHES ALL ENDS IN
MAXIMUM OPERATING TEMP: 1000.0 FAHRENHEIT FIRST RESPONSE DEGF
CONNECTION STYLE: PLAIN,OPTIONAL END(PIPE) ALL ENDS
TECHNICAL CHARACTERISTICS (FLIS)
THREAD DIRECTIONRIGHT-HAND ALL ENDS
THREAD SERIES DESIGNATORNPT ALL ENDS
BONNET ATTACHMENT METHODUNION
MATERIALSTEEL UNS K03504 BODY
NOMINAL THREAD SIZE1.000 INCHES ALL ENDS IN
MAXIMUM OPERATING TEMP1000.0 FAHRENHEIT FIRST RESPONSE DEGF
MAXIMUM OPERATING TEMP100.0 FAHRENHEIT SECOND RESPONSE DEGF
CONNECTION STYLEPLAIN,OPTIONAL END(PIPE) ALL ENDS
CONNECTION TYPETHREADED INTERNAL PIPE ALL ENDS
VALVE OPERATION METHODMANUAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
193-48Interchangeable
interchangeable cross-reference
interchangeable
4024-32-00Interchangeable
interchangeable cross-reference
interchangeable
04722Interchangeable
interchangeable cross-reference
interchangeable
101617Interchangeable
interchangeable cross-reference
interchangeable
R-10877 FIG 3-1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 851-1IN?
851-1IN is a PAN AND TILT ASSEMBLY,THERMAL VI.
What parts can replace 851-1IN?
There are 5 known substitutes for 851-1IN: 193-48, 4024-32-00, 04722 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 851-1IN?
851-1IN is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-262-2541. This indicates validated use in U.S. government and defense supply chains.
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