The Seat,valve, cataloged under National Stock Number 4820-01-191-6588, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Aqua-Chem, Inc. Dba Aqua-Chem Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-191-6588 |
| Primary Part Number | 194-07636-000 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Aqua-Chem, Inc. Dba Aqua-Chem Inc |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.125 INCHES NOMINAL IN |
| Flange Diameter | 1.312 INCHES NOMINAL IN |
| Thread Length | 0.312 INCHES NOMINAL SINGLE THREADED PORTION IN |
| Body Stepped Inside Diameter | 0.250 INCHES NOMINAL FIRST STEP IN |
| Body Stepped Inside Diameter | 0.750 INCHES NOMINAL SECOND STEP IN |
| Style Designator | THREADED FLANGED |
| Material Document and Classification | ASTM B164-61,CLB ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 1.250 INCHES SINGLE THREADED PORTION IN |
| Under Flange Height | 0.375 INCHES NOMINAL IN |
| Thread Class | 2A SINGLE THREADED PORTION A |
| Thread Quantity Per Inch | 20 SINGLE THREADED PORTION |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UN SINGLE THREADED PORTION |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 194-07636-000 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| Reference | Meaning |
|---|---|
| 194-07636-000 | 3/9 Design control — primary reference Aqua-Chem, Inc. |
| 194-7659 | 5/9 Secondary reference Aqua-Chem, Inc. |
| 322-7561 | 5/9 Secondary reference Aqua-Chem, Inc. |
| 194-7636 | 5/9 Secondary reference Aqua-Chem, Inc. |
| 322-7561 PIECE 8 | 5/9 Secondary reference Aqua-Chem, Inc. |
NSN 4820-01-191-6588 is a Seat,valve, manufactured by Aqua-Chem, Inc. Dba Aqua-Chem Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-191-6588 has 1 manufacturer part number on file: 194-07636-000 (Aqua-Chem, Inc. Dba Aqua-Chem Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-214-7192. Verify interchangeability with system specifications before substitution.
Key specifications for 194-07636-000: Flange Seat to Disk End Height: 0.125 INCHES NOMINAL IN; Flange Diameter: 1.312 INCHES NOMINAL IN; Thread Length: 0.312 INCHES NOMINAL SINGLE THREADED PORTION IN; Body Stepped Inside Diameter: 0.250 INCHES NOMINAL FIRST STEP IN. 14 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.