PartsTable
Technical Data Sheet
525-L ✓ 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

The VALVE,RESTRICTOR CHECK is a the manufacturer industrial component. Key specifications include color: BLACK, width: 34.000 INCHES NOMINAL IN, overall_length: 38.000 INCHES NOMINAL IN, usage_location: BACK, size_designation: LARGE, special_features: FOUR BELT-IN STAYS INSURE LUMBAR SUPPORT, SPECIAL RUBBER STITCHING KEEPS FROM RIDING IN VIRTUALLY ANY POSITION. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-640-5635, 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
525-L
NSN: 4820-00-640-5635
FSC: 4820
CAGE: 45681 — PARKER-HANNIFIN CORPORATION DBA PNEUTRONICS DIV CORPORATE HEADQUARTERS (USA)
SPECIFICATIONS
colorBLACK
width34.000 INCHES NOMINAL IN
overall_length38.000 INCHES NOMINAL IN
usage_locationBACK
size_designationLARGE
special_featuresFOUR BELT-IN STAYS INSURE LUMBAR SUPPORT, SPECIAL RUBBER STITCHING KEEPS FROM RIDING IN VIRTUALLY ANY POSITION
furnished_items_and_quantityADJUSTABLE DETACHABLE SUSPENDERS (2)
part_name_assigned_by_controlling_agencySUPPORT LUMBAR LARGE 38IN L X 34IN W BLACK IN
NSN4820-00-640-5635
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 525-L · 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
THREAD SERIES DESIGNATOR: UN FIRST END
MATERIAL: RUBBER SYNTHETIC PACKING
MEDIA FOR WHICH DESIGNED: FUEL/OIL, HYDROCARBON SINGLE RESPONSE
FLOW CONTROL DEVICE: DISK
VALVE OPERATION METHOD: AUTOMATIC
NOMINAL PIPE SIZE ACCOMMODATED: 1.000 INCHES SECOND END IN
MOUNTING POSITION: HORIZONTAL
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SERIES DESIGNATORUN FIRST END
MATERIALRUBBER SYNTHETIC PACKING
MEDIA FOR WHICH DESIGNEDFUEL/OIL, HYDROCARBON SINGLE RESPONSE
FLOW CONTROL DEVICEDISK
VALVE OPERATION METHODAUTOMATIC
NOMINAL PIPE SIZE ACCOMMODATED1.000 INCHES SECOND END IN
MOUNTING POSITIONHORIZONTAL
THREAD SERIES DESIGNATORANPT SECOND END
APERTURE DIAMETER0.040 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND SECOND END
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
525-LInterchangeable
interchangeable cross-reference
interchangeable
OK-1000S SIZE LARGEInterchangeable
interchangeable cross-reference
interchangeable
OK 250S-LInterchangeable
interchangeable cross-reference
interchangeable
INDUSTRIAL BACK SUPPORTInterchangeable
interchangeable cross-reference
interchangeable
79-89147Interchangeable
interchangeable cross-reference
interchangeable
633757Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 525-L?
525-L is a VALVE,RESTRICTOR CHECK.
What parts can replace 525-L?
There are 7 known substitutes for 525-L: 525-L, OK-1000S SIZE LARGE, OK 250S-L and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 525-L?
525-L is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-640-5635. This indicates validated use in U.S. government and defense supply chains.
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