The Valve,angle, cataloged under National Stock Number 4820-01-313-4535, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Nibco Inc Chemtrol Div. Government technical data includes 30 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-313-4535 |
| Primary Part Number | F-838-31 |
| Item Name | Valve,angle |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Nibco Inc Chemtrol Div |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Furnished Items and Quantity | 1 HANDWHEEL |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Bolt Circle Nominal Diameter | 7.500 INCHES ALL ENDS IN |
| Supplementary Features | THIS ITEM HAS BEEN REFVIEWED FOR ASBESTOS MATERIAL;THE CURRENT APPROVED SOURCES; 12168 HAVE INDICATED THEIR PART NUMBER CONTAINED ASBESTOS PRIOR TO 1984,THEY CONTINUE TO MANUFACTURE THE SAME PART NUMBER WITHOUT ASBESTOS MATERIAL AFTER 1984 |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Material Document and Classification | ASTM B-371 ALLOY C69400 ASSN STD SINGLE MATERIAL RESPONSE STEM |
| Material Document and Classification | ASTM B-61 ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | ASTM A-395 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTM B-61 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Bolt Hole Nominal Diameter | 0.750 INCHES ALL ENDS IN |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Operating Pressure | 250.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Valve Size | 4.000 INCHES IN |
| Features Provided | BONNET PACKING |
| Bonnet Type | OUTSIDE SCREW-YOKE |
| Maximum Operating Temp | 100.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Maximum Operating Temp | 550.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Second Connection Face to Centerline Distance | 5.750 INCHES IN |
| Nominal Outside Diameter | 9.000 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 8 ALL ENDS |
| Bonnet Attachment Method | BOLTED |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Media for Which Designed | STEAM FIRST RESPONSE |
| First Connection Face to Centerline Distance | 5.750 INCHES IN |
| Material | COPPER ALLOY 694 STEM |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE PACKING |
| Material | COPPER ALLOY 922 FLOW CONTROL DEVICE |
| 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 |
|---|---|
| F-838-31 PRIMARY | Nibco Inc Chemtrol Div (USA) |
| F-838-31-4IN | Nibco Inc Chemtrol Div (USA) |
| Reference | Meaning |
|---|---|
| F-838-31 | 3/9 Design control — primary reference Nibco Inc |
| F-838-31-4IN | 5/9 Secondary reference Nibco Inc |
| F-838031-4IN | 5/9 Secondary reference Nibco Inc Chemtrol Div |
NSN 4820-01-313-4535 is a Valve,angle, manufactured by Nibco Inc Chemtrol Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-313-4535 has 2 manufacturer part numbers on file: F-838-31 (Nibco Inc Chemtrol Div), F-838-31-4IN (Nibco Inc Chemtrol Div).
Key specifications for F-838-31: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Furnished Items and Quantity: 1 HANDWHEEL; Flange Face Design: RAISED STRAIGHT ALL ENDS. 30 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.