The Valve,check, cataloged under National Stock Number 4820-00-811-6437, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Ashcroft Inc Dba Heise. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-811-6437 |
| Primary Part Number | 4570 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.500 INCHES ALL ENDS IN |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Material | COPPER ALLOY SEAT |
| Material | COPPER ALLOY BODY |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Flow Control Device | DISK |
| Thread Series Designator | NPT ALL ENDS |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY SIZE OF END CONNECTIONS |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Thread Quantity Per Inch | 14 ALL ENDS |
| Maximum Operating Temp | 550.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Mounting Position | VERTICAL |
| Media for Which Designed | STEAM SINGLE RESPONSE |
| Style Designator | STRAIGHT THRU |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 4570 | Ashcroft Inc Dba Heise (USA) |
| 4570 1/2IN | Ashcroft Inc Dba Heise (USA) |
NSN 4820-00-811-6437 is a Valve,check, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-811-6437 has 2 cross-referenced part numbers: 4570 (Ashcroft Inc Dba Heise), 4570 1/2IN (Ashcroft Inc Dba Heise).
There are 12 known substitutes for 4820-00-811-6437: 6240-00-132-5328, 5925-00-174-0387, 5935-00-205-9408 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 4570: Nominal Pipe Size Accommodated: 0.500 INCHES ALL ENDS IN; Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS; Material: COPPER ALLOY SEAT; Material: COPPER ALLOY BODY. 18 total characteristics are documented in the Federal Logistics Information System.