| Item Name | Seat Valve |
| Federal Supply Group (FSG) | Valves |
| Federal Supply Class (FSC) | 4820 Valves Nonpowered |
| National Item Identification Number (NIIN) | 01-342-1731 (013421731) |
| NCB Code | USA (01) |
| Manufacturer | Velan Valve Corporation, National Instruments Corporation |
| Part Number | Manufacturer | Item Name | Cage Code | RFQ |
|---|---|---|---|---|
| 73811-130 8543-009-440 | velan valve corporation | seat valve | 57574 | RFQ |
| 73811-130/8543-009-440VM | national instruments corporation | seat valve | 03950 | RFQ |
| 8543-009-440 | velan valve corporation | seat valve | 57574 | RFQ |
| 8543-009-440VM | national instruments corporation | seat valve | 03950 | RFQ |
| 8543-009-440VM | velan valve corporation | seat valve | 57574 | RFQ |
| MRC | Criteria | Characteristic |
|---|---|---|
| CQKM | SEATING SURFACE SHAPE | O-RING |
| ABKK | FLANGE DIAMETER | 4.895 INCHES NOMINAL |
| ADAS | BODY INSIDE DIAMETER | 4.000 INCHES NOMINAL |
| AGAV | END ITEM IDENTIFICATION | SWING CHECK VALVE |
| AJRF | FLANGE SEAT TO DISK END HEIGHT | 0.937 INCHES NOMINAL |
| AJRM | UNDER FLANGE HEIGHT | 0.156 INCHES NOMINAL |
| ZZZY | REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | MAGNETIC PERMEABILITY SHALL NOT EXCEED 2.0 AFTER FABRICATION |
| ADAR | BODY OUTSIDE DIAMETER | 4.500 INCHES NOMINAL |
| MATT | MATERIAL | STEEL OVERALL |
| STYL | STYLE DESIGNATOR | PLAIN FLANGED |
| Relevant Components for NSN - 4820-01-342-1731, 4820013421731 | ||||
| 4820-01-396-8269 (4820013968269) | 4820-01-394-6183 (4820013946183) | 4820-00-971-1986 (4820009711986) | 4820-01-631-7474 (4820016317474) | |
| 4810-01-315-8174 (4810013158174) | 4820-01-045-1164 (4820010451164) | 4820-01-169-9733 (4820011699733) | 4820-01-233-9010 (4820012339010) | |
| 4820-01-169-8577 (4820011698577) | 4820-01-130-1407 (4820011301407) | 4810-01-641-9373 (4810016419373) | 4820-01-646-8601 (4820016468601) | |
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