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561B — SEAL ASSEMBLY,SHAFT,SPRING LOADE

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

561B: SEAL ASSEMBLY,SHAFT,SPRING LOADE.

SEAL ASSEMBLY,SHAFT,SPRING LOADE. Key specifications include general_characteristics_item_description: BRONZE; 1.625 IN. I.D.

IN. This part is cataloged in the U.S. Government catalog under NSN 4820-00-812-5379, 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
561B
NSN: 4820-00-812-5379
NIINs: 008125379, 008696163, 012539108
FSC: 4820 — Valves, Nonpowered
CAGE: 28968 — CIRCOR INSTRUMENTATION TECHNOLOGIES, INC. DBA HOKE GYROLOK (USA)
SPECIFICATIONS
general_characteristics_item_descriptionBRONZE; 1.625 IN. I.D. IN
NSN4820-00-812-5379
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 561B · 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
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FLOW CONTROL DEVICE: DISK
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NOMINAL PIPE SIZE ACCOMMODATED: 0.250 INCHES FIRST END IN
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CONNECTION STYLE: PLAIN (PIPE) FIRST END
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CONNECTION TYPE: THREADED EXTERNAL PIPE FIRST END
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STYLE DESIGNATOR: ANGLE
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OPERATING PRESSURE: 55.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
•
ADJUSTABLE PRESSURE RANGE: +45.0 TO 55.0 POUNDS PER SQUARE INCH LBS
•
BONNET TYPE: INSIDE SPRING
TECHNICAL CHARACTERISTICS
FLOW CONTROL DEVICEDISK
NOMINAL PIPE SIZE ACCOMMODATED0.250 INCHES FIRST END IN
CONNECTION STYLEPLAIN (PIPE) FIRST END
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST END
STYLE DESIGNATORANGLE
OPERATING PRESSURE55.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
ADJUSTABLE PRESSURE RANGE+45.0 TO 55.0 POUNDS PER SQUARE INCH LBS
BONNET TYPEINSIDE SPRING
THREAD DIRECTIONRIGHT-HAND FIRST END
NOMINAL THREAD SIZE0.250 INCHES FIRST END IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 561B?
561B is a SEAL ASSEMBLY,SHAFT,SPRING LOADE.
What is the NSN for 561B?
561B is cataloged in the U.S. Government catalog under NSN 4820-00-812-5379. This indicates validated use in U.S. government and defense supply chains.
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