PartsTable
Technical Data Sheet
M522 ✓ Verified by PartsTable
· MRO · MRO_GENERAL
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

MODIFICATION KIT,TELEPHONE EQUIP. Key specifications include material: COPPER ALLOY SEAT, bonnet_type: INSIDE SCREW, connection_type: THREADED INTERNAL PIPE ALL ENDS, connection_style: PLAIN,OPTIONAL END(PIPE) ALL ENDS, style_designator: STRAIGHT THRU, thread_direction: RIGHT-HAND 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 4820-00-224-7483, 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
MRO MRO_GENERAL M522
NSN: 4820-00-224-7483
FSC: 4820
CAGE: 11568 — GARDNER DENVER INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY SEAT
bonnet_typeINSIDE SCREW
connection_typeTHREADED INTERNAL PIPE ALL ENDS
connection_stylePLAIN,OPTIONAL END(PIPE) ALL ENDS
style_designatorSTRAIGHT THRU
thread_directionRIGHT-HAND ALL ENDS
features_providedBONNET PACKING
flow_control_deviceDISK
nominal_thread_size0.250 INCHES ALL ENDS IN
valve_operation_methodMANUAL
end_item_identificationCONTROLLER, WHISTLE; LOGISTICS SUPPORT VESSEL
bonnet_attachment_methodTHREADED
NSN4820-00-224-7483
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: M522 · 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
CONNECTION STYLE: PLAIN,OPTIONAL END(PIPE) ALL ENDS
BONNET ATTACHMENT METHOD: THREADED
MATERIAL: COPPER ALLOY SEAT
FLOW CONTROL DEVICE: DISK
NOMINAL THREAD SIZE: 0.250 INCHES ALL ENDS IN
THREAD DIRECTION: RIGHT-HAND ALL ENDS
FEATURES PROVIDED: BONNET PACKING
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEPLAIN,OPTIONAL END(PIPE) ALL ENDS
BONNET ATTACHMENT METHODTHREADED
MATERIALCOPPER ALLOY SEAT
FLOW CONTROL DEVICEDISK
NOMINAL THREAD SIZE0.250 INCHES ALL ENDS IN
THREAD DIRECTIONRIGHT-HAND ALL ENDS
FEATURES PROVIDEDBONNET PACKING
MATERIALCOPPER ALLOY BODY
MATERIALRUBBER SYNTHETIC FLOW CONTROL DEVICE
STYLE DESIGNATORSTRAIGHT THRU
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
RHS7R0Interchangeable
interchangeable cross-reference
interchangeable
M-522Interchangeable
interchangeable cross-reference
interchangeable
M518Interchangeable
interchangeable cross-reference
interchangeable
NT4X43KAInterchangeable
interchangeable cross-reference
interchangeable
438-8433844 ITEM 25Interchangeable
interchangeable cross-reference
interchangeable
M-511C ACInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M522?
M522 is a MODIFICATION KIT,TELEPHONE EQUIP. It is classified as a MRO (MRO_GENERAL).
What parts can replace M522?
There are 8 known substitutes for M522: RHS7R0, M-522, M518 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M522?
M522 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-224-7483. This indicates validated use in U.S. government and defense supply chains.
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