The Valve,butterfly, cataloged under National Stock Number 4820-01-439-1765, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Automation Solutions Final Control Us Lp. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-439-1765 |
| Primary Part Number | 088-703-080-AR2-000 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 11.750 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Material Document and Classification | ASTM A-276 COND A ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | ASTM A-395 GRADE 60-40-18 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM B-148 GR A ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Bolt Hole Nominal Diameter | 0.750 INCHES ALL ENDS IN |
| Valve Size | 8.000 INCHES IN |
| Nominal Outside Diameter | 10.688 INCHES ALL ENDS IN |
| Mounting Facility | LUG(S) |
| Bolt Hole Quantity | 8 ALL ENDS |
| Material | IRON BODY |
| Material | STEEL COMP 316 STEM |
| Material | ALUMINUM ALLOY FLOW CONTROL DEVICE |
| Valve Operation Method | MANUAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| DAR2-8-088 8IN | Emerson Automation Solutions Final Control Us Lp (USA) |
| SM0784 8.0 IN. | Emerson Automation Solutions Final Control Us Lp (USA) |
| 088-703-080-AR2-000 PRIMARY | Emerson Automation Solutions Final Control Us Lp (USA) |
| Reference | Meaning |
|---|---|
| DAR2-8-088 | D/9 Drawing number reference only Emerson Automation Solutions Final Control Us Lp |
| SM0784 | D/9 Drawing number reference only Emerson Automation Solutions Final Control Us Lp |
NSN 4820-01-439-1765 is a Valve,butterfly, manufactured by Emerson Automation Solutions Final Control Us Lp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-439-1765 has 3 manufacturer part numbers on file: DAR2-8-088 8IN (Emerson Automation Solutions Final Control Us Lp), SM0784 8.0 IN. (Emerson Automation Solutions Final Control Us Lp), 088-703-080-AR2-000 (Emerson Automation Solutions Final Control Us Lp).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-439-1769, 4820-01-439-1774. Verify interchangeability with system specifications before substitution.
Key specifications for 088-703-080-AR2-000: Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Bolt Circle Nominal Diameter: 11.750 INCHES ALL ENDS IN; Connection Type: FLANGE ALL ENDS. 17 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.