PartsTable
Technical Data Sheet
20256Z51M ✓ 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: NICKEL ALLOY K-500 OR NICKEL ALLOY 502 FLOW CONTROL DEVICE, body_style: ANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS, temp_rating: 165.0 FAHRENHEIT DEGF, temp_adjustability: NOT ADJUSTABLE, fsc_application_data: VALVE SAFETY RELIEF, adjustable_pressure_range: 501.0 TO 600.0 CAMERA MOUNT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-130-8468, 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
20256Z51M
NSN: 4820-01-130-8468
FSC: 4820
CAGE: 15187 — EMERSON AUTOMATION SOLUTIONS FINAL CONTROL US LP DIV NAVY PRODUCT TEAM (USA)
SPECIFICATIONS
materialNICKEL ALLOY K-500 OR NICKEL ALLOY 502 FLOW CONTROL DEVICE
body_styleANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS
temp_rating165.0 FAHRENHEIT DEGF
temp_adjustabilityNOT ADJUSTABLE
fsc_application_dataVALVE SAFETY RELIEF
adjustable_pressure_range501.0 TO 600.0 CAMERA MOUNT
material_document_and_classificationQQ-N-286, CLASS A FED SPEC SINGLE MATERIAL RESPONSE OR QQ-N-286, CLASS B FED SPEC SINGLE MATERIAL RESPONSE STEM
first_connection_face_to_centerline_distance6.938 INCHES NOMINAL IN
second_connection_face_to_centerline_distance6.438 INCHES NOMINAL IN
NSN4820-01-130-8468
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS SIZE: — · — · — PN: 20256Z51M · 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
ADJUSTABLE PRESSURE RANGE: +501.0 TO 600.0 POUNDS PER SQUARE INCH LBS
FLOW CONTROL DEVICE: DISK
CONNECTION STYLE: STREAMLINED WITH ONE BRAZING RING ALL ENDS
VALVE OPERATION METHOD: AUTOMATIC
MEDIA FOR WHICH DESIGNED: AIR SINGLE RESPONSE
CONNECTION TYPE: UNTHREADED INTERNAL PIPE ALL ENDS
OPERATING PRESSURE: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MATERIAL: NICKEL ALLOY OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
ADJUSTABLE PRESSURE RANGE+501.0 TO 600.0 POUNDS PER SQUARE INCH LBS
FLOW CONTROL DEVICEDISK
CONNECTION STYLESTREAMLINED WITH ONE BRAZING RING ALL ENDS
VALVE OPERATION METHODAUTOMATIC
MEDIA FOR WHICH DESIGNEDAIR SINGLE RESPONSE
CONNECTION TYPEUNTHREADED INTERNAL PIPE ALL ENDS
OPERATING PRESSURE3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
MATERIALNICKEL ALLOY OVERALL
STYLE DESIGNATORANGLE
NOMINAL PIPE SIZE ACCOMMODATED2.000 INCHES ALL ENDS IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
20256Z51MInterchangeable
interchangeable cross-reference
interchangeable
20256Interchangeable
interchangeable cross-reference
interchangeable
20256J01S0501Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20256Z51M?
20256Z51M is a VALVE,SAFETY RELIEF.
What parts can replace 20256Z51M?
There are 3 known substitutes for 20256Z51M: 20256Z51M, 20256, 20256J01S0501. Substitute compatibility should be verified for your specific system.
What is the NSN for 20256Z51M?
20256Z51M is cataloged in the Federal Logistics Information System (FLIS) under NSN 4820-01-130-8468. This indicates validated use in U.S. government and defense supply chains.
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