The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-00-849-9731, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Watts Regulator Company. Government technical data includes 26 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-849-9731 |
| Primary Part Number | 40XL-3/4IN.100PSI |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Watts Regulator Company |
| Status | ACTIVE |
| Material | PLASTIC SILICONE FLOW CONTROL DEVICE |
| Flow Control Device | POPPET |
| Second End Nominal Pipe Size Accommodated | 0.750 INCHES IN |
| Second End Relationship with First End | NOT IDENTICAL |
| First End Thread Series Designator | NPT |
| Temp Adjustability | NOT ADJUSTABLE |
| Opening Pressure Setting | ERR-060 |
| Bulb Length | 5.750 INCHES NOMINAL IN |
| Second End Connection Type | THREADED EXTERNAL PIPE |
| End Connection Quantity | 2 |
| Second End Thread Direction | RIGHT-HAND |
| Body Style | ANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS |
| Temp Control Device Type | THERMOSTATIC |
| First End Nominal Pipe Size Accommodated | 0.750 INCHES IN |
| Furnished Items | EMERGENCY OPENING DEVICE |
| Second End Thread Series Designator | NPT |
| First End Style Designator | PLAIN |
| First End Nominal Thread Size | 0.750 INCHES IN |
| Material | COPPER ALLOY BODY |
| Material | COPPER ALLOY STEM |
| First End Connection Type | THREADED INTERNAL PIPE |
| Second End Nominal Thread Size | 0.750 INCHES IN |
| First End Thread Direction | RIGHT-HAND |
| Second End Style Designator | PLAIN |
| Media for Which Designed | WATER, FRESH |
| Temp Rating | 210.0 FAHRENHEIT DEGF |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 40XL | Watts Regulator Company (USA) |
| 40XL-3/4IN.90PSI | Watts Regulator Company (USA) |
| 40XL-3/4IN.100PSI PRIMARY | Watts Regulator Company (USA) |
NSN 4820-00-849-9731 is a Valve,relief,pressure and Temper, manufactured by Watts Regulator Company, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-849-9731 has 3 cross-referenced part numbers: 40XL (Watts Regulator Company), 40XL-3/4IN.90PSI (Watts Regulator Company), 40XL-3/4IN.100PSI (Watts Regulator Company).
There are 3 known substitutes for 4820-00-849-9731: 4820-00-541-8839, 4820-00-855-6169, 2590-01-394-9697. Verify interchangeability with system specifications before substitution.
Key specifications for 40XL-3/4IN.100PSI: Material: PLASTIC SILICONE FLOW CONTROL DEVICE; Flow Control Device: POPPET; Second End Nominal Pipe Size Accommodated: 0.750 INCHES IN; Special Features: 130.000 BTU PER HR MIN DISCHARGE. 27 total characteristics are documented in the Federal Logistics Information System.