The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-00-632-1521, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Aalberts Integrated Piping Systems Americas, Inc.. Government technical data includes 22 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-632-1521 |
| Primary Part Number | 18C-402-27 |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Aalberts Integrated Piping Systems Americas, Inc. |
| Status | CANCELLED |
| Second End Nominal Pipe Size Accommodated | 0.750 INCHES IN |
| Second End Connection Type | THREADED EXTERNAL PIPE |
| End Connection Quantity | 2 |
| Material | COPPER ALLOY SEAT |
| Flow Control Device | POPPET |
| Temp Adjustability | NOT ADJUSTABLE |
| Second End Style Designator | PLAIN |
| Furnished Items | EMERGENCY OPENING DEVICE |
| Temp Control Device Type | THERMOSTATIC |
| Material | PLASTIC SILICONE FLOW CONTROL DEVICE |
| First End Thread Direction | RIGHT-HAND |
| Second End Thread Direction | RIGHT-HAND |
| Material | COPPER ALLOY BODY |
| Body Style | ANGLE GIVE "ADQM" AND "ADQN" ONLY IF FLANGED ONE OR TWO ENDS |
| Temp Rating | 210.0 FAHRENHEIT DEGF |
| Material | COPPER ALLOY STEM |
| Second End Relationship with First End | NOT IDENTICAL |
| First End Connection Type | THREADED INTERNAL PIPE |
| First End Style Designator | PLAIN |
| Media for Which Designed | WATER, FRESH |
| Opening Pressure Setting | ERR-060 |
| First End Nominal Pipe Size Accommodated | 0.750 INCHES IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 18C-402-27 PRIMARY | Aalberts Integrated Piping Systems Americas, Inc. (USA) |
| 40L PRIMARY | Watts Regulator Company (USA) |
| 401X | Smith a O Corp Consumer Products Div (USA) |
| 40L3-4 | Watts Regulator Company (USA) |
| ANSI Z21.22 | American National Standards Institute Incorporated Dba American National Standards Institute (USA) |
| MILV13612 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 18-302-09 | Aalberts Integrated Piping Systems Americas, Inc. (USA) |
| 18-402-27 | Aalberts Integrated Piping Systems Americas, Inc. (USA) |
NSN 4820-00-632-1521 is a Valve,relief,pressure and Temper, manufactured by Aalberts Integrated Piping Systems Americas, Inc., classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-632-1521 has 8 cross-referenced part numbers: 18C-402-27 (Aalberts Integrated Piping Systems Americas, Inc.), 40L (Watts Regulator Company), 401X (Smith a O Corp Consumer Products Div), 40L3-4 (Watts Regulator Company), ANSI Z21.22 (American National Standards Institute Incorporated Dba American National Standards Institute) and 3 more.
There are 8 known substitutes for 4820-00-632-1521: 4820-00-142-3190, 6220-00-299-6821, 5961-00-608-0501 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 18C-402-27: Second End Nominal Pipe Size Accommodated: 0.750 INCHES IN; Second End Connection Type: THREADED EXTERNAL PIPE; End Connection Quantity: 2; Material: COPPER ALLOY SEAT. 23 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-632-1521 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.