PartsTable
Technical Data Sheet
40398-904 ✓ 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,REGULATING,FLUID PRESSURE. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE, body_style: STRAIGHT THRU, regulation_type: MANUAL SINGLE STAGE, special_features: PART NAME ASSIGNED BY CONTROLLING AGENCY IS 3/4 INCH TRAC STYLE "H" PRESSURE REDUCING VALVE IN, flow_control_device: DISK, valve_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 4820-01-510-3031, 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
40398-904
NSN: 4820-01-510-3031
FSC: 4820
CAGE: 55378 — TRAC REGULATOR CO., INC. DBA TRAC REGULATOR CO INC (USA)
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE
body_styleSTRAIGHT THRU
regulation_typeMANUAL SINGLE STAGE
special_featuresPART NAME ASSIGNED BY CONTROLLING AGENCY IS 3/4 INCH TRAC STYLE "H" PRESSURE REDUCING VALVE IN
flow_control_deviceDISK
valve_loading_methodSPRING
manual_control_methodSCREW
outlet_pressure_range50.0 TO 150.0 CAMERA MOUNT
end_connection_quantity2
media_for_which_designedWATER, SALT
first_end_connection_typeUNTHREADED INTERNAL PIPE
first_end_style_designatorSOCKET W/BRAZING RING
NSN4820-01-510-3031
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 40398-904 · 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
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
FIRST END CONNECTION TYPE: UNTHREADED INTERNAL PIPE
BODY STYLE: STRAIGHT THRU
FIRST END STYLE DESIGNATOR: SOCKET W/BRAZING RING
FLOW CONTROL DEVICE: DISK
MEDIA FOR WHICH DESIGNED: WATER, SALT
FIRST END NOMINAL PIPE SIZE ACCOMMODATED: 0.750 INCHES IN
MATERIAL: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE
TECHNICAL CHARACTERISTICS (FLIS)
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
FIRST END CONNECTION TYPEUNTHREADED INTERNAL PIPE
BODY STYLESTRAIGHT THRU
FIRST END STYLE DESIGNATORSOCKET W/BRAZING RING
FLOW CONTROL DEVICEDISK
MEDIA FOR WHICH DESIGNEDWATER, SALT
FIRST END NOMINAL PIPE SIZE ACCOMMODATED0.750 INCHES IN
MATERIALRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR FLOW CONTROL DEVICE
OUTLET PRESSURE RANGE50.0 TO 150.0 CAMERA MOUNT
REGULATION TYPEMANUAL SINGLE STAGE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
403989Interchangeable
interchangeable cross-reference
interchangeable
40398-09Interchangeable
interchangeable cross-reference
interchangeable
40398-901Interchangeable
interchangeable cross-reference
interchangeable
CVCPICInterchangeable
interchangeable cross-reference
interchangeable
40398-905Interchangeable
interchangeable cross-reference
interchangeable
40398-909Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 40398-904?
40398-904 is a VALVE,REGULATING,FLUID PRESSURE.
What parts can replace 40398-904?
There are 9 known substitutes for 40398-904: 403989, 40398-09, 40398-901 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 40398-904?
40398-904 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-510-3031. This indicates validated use in U.S. government and defense supply chains.
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