PartsTable
Technical Data Sheet
4644-1 ✓ Verified by PartsTable
Lindy · 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

The TRANSFORMER,POWER is a Lindy industrial component. Key specifications include material: ALUMINUM ALLOY SEAT, body_width: 1.172 INCHES NOMINAL IN, seat_angle: 37.0 DEGREES FIRST END, body_height: 1.938 INCHES NOMINAL IN, body_length: 1.500 INCHES NOMINAL IN, thread_class: 3A FIRST END A. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-450-6539, 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
4644-1
NSN: 4820-00-450-6539
FSC: 4820
CAGE: 78357 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV QUICK COUPLER DIVISION (USA)
SPECIFICATIONS
materialALUMINUM ALLOY SEAT
body_width1.172 INCHES NOMINAL IN
seat_angle37.0 DEGREES FIRST END
body_height1.938 INCHES NOMINAL IN
body_length1.500 INCHES NOMINAL IN
thread_class3A FIRST END A
inclosure_typeHERMETICALLY SEALED
connection_typeTHREADED EXTERNAL TUBE FIRST END
mounting_methodFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
connection_styleFLARED (TUBE) FIRST END
style_designatorANGLE
thread_directionRIGHT-HAND FIRST END
NSN4820-00-450-6539
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 4644-1 · Lindy ⚠ 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: FLARED (TUBE) FIRST END
THREAD CLASS: 3A FIRST END A
DISK LOADING METHOD: SPRING
OPENING PRESSURE SETTING: 1425.0 POUNDS PER SQUARE INCH LBS
NOMINAL THREAD SIZE: 0.437 INCHES FIRST END IN
FLOW CONTROL DEVICE: POPPET
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED: 0.250 INCHES FIRST END IN
SEAT ANGLE: 37.0 DEGREES FIRST END
TECHNICAL CHARACTERISTICS (FLIS)
CONNECTION STYLEFLARED (TUBE) FIRST END
THREAD CLASS3A FIRST END A
DISK LOADING METHODSPRING
OPENING PRESSURE SETTING1425.0 POUNDS PER SQUARE INCH LBS
NOMINAL THREAD SIZE0.437 INCHES FIRST END IN
FLOW CONTROL DEVICEPOPPET
NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED0.250 INCHES FIRST END IN
SEAT ANGLE37.0 DEGREES FIRST END
MATERIALALUMINUM ALLOY SEAT
STYLE DESIGNATORANGLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
M7475601Interchangeable
interchangeable cross-reference
interchangeable
46441Interchangeable
interchangeable cross-reference
interchangeable
9T35Y6046Interchangeable
interchangeable cross-reference
interchangeable
35946Interchangeable
interchangeable cross-reference
interchangeable
Y35946Interchangeable
interchangeable cross-reference
interchangeable
166L068-3Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4644-1?
4644-1 is a TRANSFORMER,POWER manufactured by Lindy.
What parts can replace 4644-1?
There are 6 known substitutes for 4644-1: M7475601, 46441, 9T35Y6046 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 4644-1?
4644-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-450-6539. This indicates validated use in U.S. government and defense supply chains.
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