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MS28771-4 — VALVE,CHECK

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

MS28771-4: VALVE,CHECK.

The VALVE,CHECK is a the manufacturer industrial component. Key specifications include material: RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING, seat_angle: 37.0 DEGREES FIRST END, thread_class: 3A FIRST END A, connection_type: THREADED INTERNAL BOSS SECOND END, connection_style: GASKET SEAL (BOSS) SECOND END, style_designator: STRAIGHT THRU. This part is cataloged in the U.S.

Government catalog under NSN 4820-00-729-6861, 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
MS28771-4
NSN: 4820-00-729-6861
FSC: 4820 — Valves, Nonpowered
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialRUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING
seat_angle37.0 DEGREES FIRST END
thread_class3A FIRST END A
connection_typeTHREADED INTERNAL BOSS SECOND END
connection_styleGASKET SEAL (BOSS) SECOND END
style_designatorSTRAIGHT THRU
thread_directionRIGHT-HAND SECOND END
mounting_positionHORIZONTAL OR VERTICAL
operating_pressure5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
disk_loading_methodSPRING
flow_control_devicePOPPET
nominal_thread_size1.062 INCHES FIRST END IN
NSN4820-00-729-6861
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: MS28771-4 · 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
SUBSTITUTES & CROSS-REFERENCES 4
458-4SS27-6Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
215-01757Reference document
Same NSN cross-reference
Reference document — Secondary reference
MIL-V-19069Reference document
Same NSN cross-reference
Reference document — Identification reference
MS28771-4SSSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MS28771-4?
MS28771-4 is a VALVE,CHECK.
What parts can replace MS28771-4?
There are 4 known substitutes for MS28771-4: 458-4SS27-6, 215-01757, MIL-V-19069 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MS28771-4?
MS28771-4 is cataloged in the U.S. Government catalog under NSN 4820-00-729-6861. This indicates validated use in U.S. government and defense supply chains.
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