PartsTable
Technical Data Sheet
20304MS51SS ✓ 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: STEEL BODY, bonnet_type: INSIDE SPRING, connection_type: THREADED EXTERNAL PIPE ALL ENDS, connection_style: PLAIN (PIPE) ALL ENDS, style_designator: ANGLE, thread_direction: RIGHT-HAND ALL ENDS. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-053-5083, 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
20304MS51SS
NSN: 4820-01-053-5083
FSC: 4820
CAGE: 15187 — EMERSON AUTOMATION SOLUTIONS FINAL CONTROL US LP DIV NAVY PRODUCT TEAM (USA)
SPECIFICATIONS
materialSTEEL BODY
bonnet_typeINSIDE SPRING
connection_typeTHREADED EXTERNAL PIPE ALL ENDS
connection_stylePLAIN (PIPE) ALL ENDS
style_designatorANGLE
thread_directionRIGHT-HAND ALL ENDS
operating_pressure125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodSPRING
flow_control_deviceDISK OR STEM
nominal_thread_size0.500 INCHES ALL ENDS IN
maximum_operating_temp165.0 FAHRENHEIT SINGLE RESPONSE DEGF
valve_operation_methodAUTOMATIC
NSN4820-01-053-5083
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 20304MS51SS · 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 OR STEM
NOMINAL THREAD SIZE: 0.500 INCHES ALL ENDS IN
CONNECTION TYPE: THREADED EXTERNAL PIPE ALL ENDS
MATERIAL: STEEL BODY
VALVE DISCHARGE FLOW RATE: 314.0 CUBIC FEET PER MINUTE
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-764,COMP 303-CANCELED FED SPEC SINGLE MATERIAL RESPONSE STEM
VALVE OPERATION METHOD: AUTOMATIC
TECHNICAL CHARACTERISTICS (FLIS)
FLOW CONTROL DEVICEDISK OR STEM
NOMINAL THREAD SIZE0.500 INCHES ALL ENDS IN
CONNECTION TYPETHREADED EXTERNAL PIPE ALL ENDS
MATERIALSTEEL BODY
VALVE DISCHARGE FLOW RATE314.0 CUBIC FEET PER MINUTE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-764,COMP 303-CANCELED FED SPEC SINGLE MATERIAL RESPONSE STEM
VALVE OPERATION METHODAUTOMATIC
MATERIALSTEEL COMP 303 STEM
MAXIMUM OPERATING TEMP165.0 FAHRENHEIT SINGLE RESPONSE DEGF
MATERIALSTEEL COMP 303 SEAT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
330-00-120-00 AND 365-03-000-00Interchangeable
interchangeable cross-reference
interchangeable
340-00-120-00 AND 365-03-100-00Interchangeable
interchangeable cross-reference
interchangeable
1604-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20304MS51SS?
20304MS51SS is a VALVE,SAFETY RELIEF.
What parts can replace 20304MS51SS?
There are 3 known substitutes for 20304MS51SS: 330-00-120-00 AND 365-03-000-00, 340-00-120-00 AND 365-03-100-00, 1604-5. Substitute compatibility should be verified for your specific system.
What is the NSN for 20304MS51SS?
20304MS51SS is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-053-5083. This indicates validated use in U.S. government and defense supply chains.
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