The Valve,check, cataloged under National Stock Number 4820-01-618-5865, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hunt Valve Company, Inc.. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-618-5865 |
| Primary Part Number | B-1620-E 2-1/2IN |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hunt Valve Company, Inc. |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Material Document and Classification | ASTM A494, GR -30G ASSN STD SINGLE MATERIAL RESPONSE SEAT G |
| Material Document and Classification | ASTM B61 ASSN STD SINGLE MATERIAL RESPONSE OR ASTM B62 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 2.50 INCHES IN |
| Nominal Outside Diameter | 7.0 INCHES ALL ENDS IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 4 ALL ENDS |
| Face to Face Distance | 8.25 INCHES IN |
| Media for Which Designed | WASTE PRODUCT SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY SEAT |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.562 INCHES ALL ENDS IN |
| 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 |
|---|---|
| B-1620-E 2-1/2IN PRIMARY | Hunt Valve Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| B-1620-E 2-1/2IN | 3/9 Design control — primary reference Pima Valve, Llc |
NSN 4820-01-618-5865 is a Valve,check, manufactured by Hunt Valve Company, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-618-5865 has 1 manufacturer part number on file: B-1620-E 2-1/2IN (Hunt Valve Company, Inc.).
Key specifications for B-1620-E 2-1/2IN: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Connection Style: PLAIN (PIPE) ALL ENDS. 20 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.