PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

33311-30 ITEM 28Stem,fluid Valve

Velan Valve Corp. · NSN 4820-01-062-8767 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-062-8767 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-062-8767. Primary manufacturer part number: 33311-30 ITEM 28.
Features
  • Stem,fluid Valve — FSC 4820
  • Criticality Code Justification: ZZZY
  • Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS THAT ARE UNIQUE TO FOSSIL FUEL POWERED SURFACE SHIPS MAIN STEAM, CATAPULT STEAM, AND HIGH PRESSURE STEAM DRAIN SYSTEMS
  • 6 verified cross-references
  • Primary manufacturer: Velan Valve Corp.
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Stem,fluid Valve, cataloged under National Stock Number 4820-01-062-8767, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Velan Valve Corp.. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-01-062-8767
Primary Part Number33311-30 ITEM 28
Item NameStem,fluid Valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerVelan Valve Corp.
StatusCANCELLED
Criticality Code JustificationZZZY
Reference Number Differentiating CharacteristicsMATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS THAT ARE UNIQUE TO FOSSIL FUEL POWERED SURFACE SHIPS MAIN STEAM, CATAPULT STEAM, AND HIGH PRESSURE STEAM DRAIN SYSTEMS
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
4820-01-117-8306 INTERCHANGEABLE
Stem,disk Assembly
4820-01-160-58443BV-A2001 INTERCHANGEABLE
Stem,fluid Valve
Velan Valve Corp.
4820-01-459-1436 INTERCHANGEABLE
Disk,valve
Cross-Reference Index
Part NumberManufacturer
33311-30 ITEM 28 Velan Valve Corp. (USA)
A03-3542-005-419-SS1 Naval Inventory Control Point Mechanicsburg (USA)
33311-30 ITEM 28S1 Naval Inventory Control Point Mechanicsburg (USA)
3BVA2001 Velan Valve Corp. (USA)
3BVA2001S1 Naval Inventory Control Point Mechanicsburg (USA)
A03-3542-005-419-S Velan Valve Corp. (USA)
Related Parts
4820-01-117-8306INTERCHANGEABLE
STEM,DISK ASSEMBLY
4820-01-160-5844INTERCHANGEABLE
STEM,FLUID VALVE
3BV-A2001
4820-01-459-1436INTERCHANGEABLE
DISK,VALVE

Frequently Asked Questions

What is NSN 4820-01-062-8767?

NSN 4820-01-062-8767 is a Stem,fluid Valve, manufactured by Velan Valve Corp., classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-01-062-8767?

NSN 4820-01-062-8767 has 6 cross-referenced part numbers: 33311-30 ITEM 28 (Velan Valve Corp.), A03-3542-005-419-SS1 (Naval Inventory Control Point Mechanicsburg), 33311-30 ITEM 28S1 (Naval Inventory Control Point Mechanicsburg), 3BVA2001 (Velan Valve Corp.), 3BVA2001S1 (Naval Inventory Control Point Mechanicsburg) and 1 more.

What NSN replaces 4820-01-062-8767?

There are 3 known substitutes for 4820-01-062-8767: 4820-01-117-8306, 4820-01-160-5844, 4820-01-459-1436. Verify interchangeability with system specifications before substitution.

What are the specifications of 33311-30 ITEM 28?

Key specifications for 33311-30 ITEM 28: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS THAT ARE UNIQUE TO FOSSIL FUEL POWERED SURFACE SHIPS MAIN STEAM, CATAPULT STEAM, AND HIGH PRESSURE STEAM DRAIN SYSTEMS. 2 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-01-062-8767 still in active supply?

NSN 4820-01-062-8767 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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