PartsTable
Technical Data Sheet
31P-VAI ✓ 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

VALVE,LINEAR,DIRECTIONAL CONTROL. Key specifications include connection_type: THREADED INTERNAL PIPE, valve_operation_method: MANUAL, furnished_items_and_quantity: 1 KNOB, maximum_operating_temp_and_media_for_which_designed: 180.0 FAHRENHEIT AIR DEGF. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-500-3128, 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
31P-VAI
NSN: 4820-01-500-3128
FSC: 4820
CAGE: 24522 — HUMPHREY PRODUCTS CO (USA)
SPECIFICATIONS
spool_quantity1
connection_typeTHREADED INTERNAL PIPE
flow_pattern_quantity3
valve_operation_methodMANUAL
end_connection_quantity3
spool_position_quantity2
furnished_items_and_quantity1 KNOB
maximum_operating_temp_and_media_for_which_designed180.0 FAHRENHEIT AIR DEGF
NSN4820-01-500-3128
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 31P-VAI · 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
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED: 180.0 FAHRENHEIT AIR DEGF
SPOOL QUANTITY: 1
SPOOL POSITION QUANTITY: 2
FLOW PATTERN QUANTITY: 3
END CONNECTION QUANTITY: 3
VALVE OPERATION METHOD: MANUAL
FURNISHED ITEMS AND QUANTITY: 1 KNOB
TECHNICAL CHARACTERISTICS (FLIS)
MAXIMUM OPERATING TEMP AND MEDIA FOR WHICH DESIGNED180.0 FAHRENHEIT AIR DEGF
SPECIAL FEATURESSPRING RETURN TYPE,3-WAY NORMALLY CLOSED/NORMALLY OPEN VALVE DIVERTOR OR DUAL-PRESSURE,2-WAY VA;VE W/PLUGGED NC OR NO PORT PLUGGED,PANEL MOUNTED W/2 NO.10 SCREWS,1.31 INCH H X 1.25 INCH W X0.63 IN D,WEIGHT 4.25 OZ. OZ
SPOOL QUANTITY1
SPOOL POSITION QUANTITY2
FLOW PATTERN QUANTITY3
END CONNECTION QUANTITY3
VALVE OPERATION METHODMANUAL
FURNISHED ITEMS AND QUANTITY1 KNOB
CONNECTION TYPETHREADED INTERNAL PIPE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
200016Interchangeable
interchangeable cross-reference
interchangeable
9171473-34Interchangeable
interchangeable cross-reference
interchangeable
200LDInterchangeable
interchangeable cross-reference
interchangeable
FF-B-171Interchangeable
interchangeable cross-reference
interchangeable
87500CE1SA2Interchangeable
interchangeable cross-reference
interchangeable
806149Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 31P-VAI?
31P-VAI is a VALVE,LINEAR,DIRECTIONAL CONTROL.
What parts can replace 31P-VAI?
There are 11 known substitutes for 31P-VAI: 200016, 9171473-34, 200LD and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 31P-VAI?
31P-VAI is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-500-3128. This indicates validated use in U.S. government and defense supply chains.
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