The Valve,check, cataloged under National Stock Number 4820-01-136-7731, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Admiral Valve Llc Dba Cpv Manufacturing. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-01-136-7731 |
| Primary Part Number | 12D-2-1/2 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Admiral Valve Llc Dba Cpv Manufacturing |
| Status | CANCELLED |
| Valve Operation Method | AUTOMATIC |
| Mounting Facility | WAFER |
| Bolt Hole Nominal Diameter | 0.750 INCHES ALL ENDS IN |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 5.500 INCHES ALL ENDS IN |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Flow Control Device | DISK |
| Connection Type | FLANGE ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Valve Size | 2.500 INCHES IN |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Bolt Hole Quantity | 4 ALL ENDS |
| Disk Loading Method | SPRING |
| Nominal Outside Diameter | 7.000 INCHES ALL ENDS IN |
| Face to Face Distance | 2.875 INCHES IN |
| Nominal Thickness | 0.562 INCHES ALL ENDS IN |
| Material | COPPER ALLOY OVERALL |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| A-9886 | Admiral Valve Llc Dba Cpv Manufacturing (USA) |
| A-9886 PL4242/PL4373 | Admiral Valve Llc Dba Cpv Manufacturing (USA) |
| 12D-2-1/2 PRIMARY | Admiral Valve Llc Dba Cpv Manufacturing (USA) |
| 12D 2 1/2IN PRIMARY | Admiral Valve Llc Dba Cpv Manufacturing (USA) |
| 2544 | Admiral Valve Llc Dba Cpv Manufacturing (USA) |
| 2544-12D 16PSIG | Admiral Valve Llc Dba Cpv Manufacturing (USA) |
NSN 4820-01-136-7731 is a Valve,check, manufactured by Admiral Valve Llc Dba Cpv Manufacturing, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-01-136-7731 has 6 cross-referenced part numbers: A-9886 (Admiral Valve Llc Dba Cpv Manufacturing), A-9886 PL4242/PL4373 (Admiral Valve Llc Dba Cpv Manufacturing), 12D-2-1/2 (Admiral Valve Llc Dba Cpv Manufacturing), 12D 2 1/2IN (Admiral Valve Llc Dba Cpv Manufacturing), 2544 (Admiral Valve Llc Dba Cpv Manufacturing) and 1 more.
There are 12 known substitutes for 4820-01-136-7731: 4730-00-056-4875, 4130-00-081-5399, 5940-00-110-5880 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 12D-2-1/2: Valve Operation Method: AUTOMATIC; Mounting Facility: WAFER; Bolt Hole Nominal Diameter: 0.750 INCHES ALL ENDS IN; Flange Face Design: PLAIN ALL ENDS. 18 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-01-136-7731 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.