The Valve,check, cataloged under National Stock Number 4820-00-726-0081, 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 | 4820-00-726-0081 |
| Primary Part Number | 4570 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Ashcroft Inc Dba Heise |
| Status | ACTIVE |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Flow Control Device | DISK |
| Material | COPPER ALLOY SEAT |
| Mounting Position | VERTICAL |
| Thread Quantity Per Inch | 14 ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY VALVE SIZE |
| Material | COPPER ALLOY BODY |
| Media for Which Designed | STEAM SINGLE RESPONSE |
| Thread Series Designator | NPT ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 550.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Pipe Size Accommodated | 0.750 INCHES ALL ENDS IN |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 4570 | Ashcroft Inc Dba Heise (USA) |
| 4570 3/4IN | Ashcroft Inc Dba Heise (USA) |
NSN 4820-00-726-0081 is a Valve,check, manufactured by Ashcroft Inc Dba Heise, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-726-0081 has 2 cross-referenced part numbers: 4570 (Ashcroft Inc Dba Heise), 4570 3/4IN (Ashcroft Inc Dba Heise).
There are 12 known substitutes for 4820-00-726-0081: 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: Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS; Flow Control Device: DISK; Material: COPPER ALLOY SEAT; Mounting Position: VERTICAL. 18 total characteristics are documented in the Federal Logistics Information System.