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Technical Data Sheet
PartsTable / COMPONENT / 20321216691SST
20321216691SST ✓ 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 valve_size: 1.000 INCHES IN, mounting_facility: BRACKET(S), operating_pressure: 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS, disk_loading_method: SPRING, flow_control_device: DISK, valve_operation_method: AUTOMATIC. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-177-3886, 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
20321216691SST
NSN: 4820-01-177-3886
FSC: 4820
CAGE: 01343 — ANDERSON GREENWOOD LP DBA ANDERSON GREENWOOD CROSBY (USA)
SPECIFICATIONS
valve_size1.000 INCHES IN
mounting_facilityBRACKET(S)
operating_pressure1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodSPRING
flow_control_deviceDISK
valve_operation_methodAUTOMATIC
media_for_which_designedWATER, FRESH SINGLE RESPONSE
opening_pressure_setting1400.0 POUNDS PER SQUARE INCH LBS
criticality_code_justificationZZZY
first_connection_face_to_centerline_distance4.750 INCHES IN
second_connection_face_to_centerline_distance4.750 INCHES IN
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
NSN4820-01-177-3886
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 20321216691SST · 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
•
FLOW CONTROL DEVICE: DISK
•
FIRST CONNECTION FACE TO CENTERLINE DISTANCE: 4.750 INCHES IN
•
OPENING PRESSURE SETTING: 1400.0 POUNDS PER SQUARE INCH LBS
•
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
•
VALVE OPERATION METHOD: AUTOMATIC
•
CRITICALITY CODE JUSTIFICATION: ZZZY
•
VALVE SIZE: 1.000 INCHES IN
•
OPERATING PRESSURE: 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
TECHNICAL CHARACTERISTICS (FLIS)
FLOW CONTROL DEVICEDISK
FIRST CONNECTION FACE TO CENTERLINE DISTANCE4.750 INCHES IN
OPENING PRESSURE SETTING1400.0 POUNDS PER SQUARE INCH LBS
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
VALVE OPERATION METHODAUTOMATIC
CRITICALITY CODE JUSTIFICATIONZZZY
VALVE SIZE1.000 INCHES IN
OPERATING PRESSURE1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MEDIA FOR WHICH DESIGNEDWATER, FRESH SINGLE RESPONSE
SECOND CONNECTION FACE TO CENTERLINE DISTANCE4.750 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
20321Interchangeable
interchangeable cross-reference
interchangeable
PX1686Interchangeable
interchangeable cross-reference
interchangeable
235H45-5Interchangeable
interchangeable cross-reference
interchangeable
72-6970-954Interchangeable
interchangeable cross-reference
interchangeable
M430774-1Interchangeable
interchangeable cross-reference
interchangeable
SK66-2742Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20321216691SST?
20321216691SST is a VALVE,SAFETY RELIEF.
What parts can replace 20321216691SST?
There are 16 known substitutes for 20321216691SST: 20321, PX1686, 235H45-5 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20321216691SST?
20321216691SST is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-177-3886. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026