PartsTable
Technical Data Sheet
ZL-556 ✓ 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: STEEL CORROSION RESISTING BODY, first_end_connection_type: THREADED INTERNAL PIPE, first_end_style_designator: PLAIN, first_end_thread_direction: RIGHT-HAND, second_end_connection_type: THREADED EXTERNAL PIPE, second_end_style_designator: PLAIN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-183-1579, 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
ZL-556
NSN: 4820-01-183-1579
FSC: 4820
CAGE: 88233 — PARKER HANNIFIN CORPORATION DBA SCHRAEDER BELLOWS DIV PNEUMATIC DIVISION (USA)
SPECIFICATIONS
materialSTEEL CORROSION RESISTING BODY
end_connection_quantity2
first_end_connection_typeTHREADED INTERNAL PIPE
first_end_style_designatorPLAIN
first_end_thread_directionRIGHT-HAND
second_end_connection_typeTHREADED EXTERNAL PIPE
second_end_style_designatorPLAIN
second_end_thread_directionRIGHT-HAND
second_end_relationship_with_first_endNOT IDENTICAL
thread_size_and_series/type_designator1/4-18 NPT FIRST END
NSN4820-01-183-1579
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: ZL-556 · 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
FIRST END CONNECTION TYPE: THREADED INTERNAL PIPE
FIRST END STYLE DESIGNATOR: PLAIN
THREAD SIZE AND SERIES/TYPE DESIGNATOR: L1/4-18 UNF SECOND END
SECOND END THREAD DIRECTION: RIGHT-HAND
SECOND END RELATIONSHIP WITH FIRST END: NOT IDENTICAL
SECOND END CONNECTION TYPE: THREADED EXTERNAL PIPE
FIRST END THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS (FLIS)
FIRST END CONNECTION TYPETHREADED INTERNAL PIPE
FIRST END STYLE DESIGNATORPLAIN
THREAD SIZE AND SERIES/TYPE DESIGNATORL1/4-18 UNF SECOND END
THREAD SIZE AND SERIES/TYPE DESIGNATOR1/4-18 NPT FIRST END
SECOND END THREAD DIRECTIONRIGHT-HAND
SECOND END RELATIONSHIP WITH FIRST ENDNOT IDENTICAL
SECOND END CONNECTION TYPETHREADED EXTERNAL PIPE
FIRST END THREAD DIRECTIONRIGHT-HAND
END CONNECTION QUANTITY2
MATERIALSTEEL CORROSION RESISTING BODY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
300094Interchangeable
interchangeable cross-reference
interchangeable
556Interchangeable
interchangeable cross-reference
interchangeable
K97S0010-1Interchangeable
interchangeable cross-reference
interchangeable
212941Interchangeable
interchangeable cross-reference
interchangeable
712286-127Interchangeable
interchangeable cross-reference
interchangeable
57-30240Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ZL-556?
ZL-556 is a VALVE,REGULATING,FLUID PRESSURE.
What parts can replace ZL-556?
There are 9 known substitutes for ZL-556: 300094, 556, K97S0010-1 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for ZL-556?
ZL-556 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-183-1579. This indicates validated use in U.S. government and defense supply chains.
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