PartsTable
Technical Data Sheet
P9-644 ✓ 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,SAFETY RELIEF is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY SEAT, connection_type: THREADED EXTERNAL PIPE FIRST END, style_designator: STRAIGHT THRU, thread_direction: RIGHT-HAND FIRST END, features_provided: PRESSURE TIGHT OUTLET SIDE, disk_loading_method: SPRING. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-822-8342, 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
P9-644
NSN: 4820-00-822-8342
FSC: 4820
CAGE: 91816 — CIRCOR AEROSPACE, INC. DBA CIRCOR AEROSPACE INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY SEAT
connection_typeTHREADED EXTERNAL PIPE FIRST END
style_designatorSTRAIGHT THRU
thread_directionRIGHT-HAND FIRST END
features_providedPRESSURE TIGHT OUTLET SIDE
disk_loading_methodSPRING
nominal_thread_size0.125 INCHES FIRST END IN
thread_quantity_per_inch27 FIRST END
thread_series_designatorNPT FIRST END
nominal_pipe_size_accommodated0.125 INCHES FIRST END IN
NSN4820-00-822-8342
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: P9-644 · 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
NOMINAL THREAD SIZE: 0.125 INCHES FIRST END IN
DISK LOADING METHOD: SPRING
THREAD SERIES DESIGNATOR: NPT FIRST END
CONNECTION TYPE: THREADED EXTERNAL PIPE FIRST END
STYLE DESIGNATOR: STRAIGHT THRU
MATERIAL: COPPER ALLOY BODY
THREAD QUANTITY PER INCH: 27 FIRST END
NOMINAL PIPE SIZE ACCOMMODATED: 0.125 INCHES FIRST END IN
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.125 INCHES FIRST END IN
DISK LOADING METHODSPRING
THREAD SERIES DESIGNATORNPT FIRST END
CONNECTION TYPETHREADED EXTERNAL PIPE FIRST END
STYLE DESIGNATORSTRAIGHT THRU
MATERIALCOPPER ALLOY BODY
THREAD QUANTITY PER INCH27 FIRST END
NOMINAL PIPE SIZE ACCOMMODATED0.125 INCHES FIRST END IN
THREAD DIRECTIONRIGHT-HAND FIRST END
MATERIALCOPPER ALLOY SEAT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 7
131090Interchangeable
interchangeable cross-reference
interchangeable
428161Interchangeable
interchangeable cross-reference
interchangeable
137314Interchangeable
interchangeable cross-reference
interchangeable
31090Interchangeable
interchangeable cross-reference
interchangeable
390014PC720Interchangeable
interchangeable cross-reference
interchangeable
NAVY 1993 1826Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is P9-644?
P9-644 is a VALVE,SAFETY RELIEF.
What parts can replace P9-644?
There are 7 known substitutes for P9-644: 131090, 428161, 137314 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for P9-644?
P9-644 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-00-822-8342. This indicates validated use in U.S. government and defense supply chains.
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