The Valve,safety Relief, cataloged under National Stock Number 4820-01-538-2850, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Emerson Automation Solutions Final Control Us Lp Div Navy Product Team. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-538-2850 |
| Primary Part Number | NMP611 OP A, DISC AY, FW SERVICE |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team |
| Status | ACTIVE |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Second Connection Face to Centerline Distance | 5.500 INCHES IN |
| Bolt Circle Nominal Diameter | 6.062 INCHES ALL ENDS IN |
| Material | COPPER ALLOY STEM |
| Specification/standard Data | 81349 - MIL-V-20065C GOVERNMENT SPECIFICATION |
| Departure From Cited Document | RELIEF VALVE |
| Flange Face Design | PLAIN ALL ENDS |
| Test Data Document | MIL-S-901C SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| First Connection Face to Centerline Distance | 7.250 INCHES IN |
| Nominal Outside Diameter | 7.188 INCHES ALL ENDS IN |
| Operating Pressure | 100.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Bolt Hole Nominal Diameter | 0.562 INCHES ALL ENDS IN |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Nominal Thickness | 0.500 INCHES ALL ENDS IN |
| Furnished Items and Quantity | 1 LEVER |
| Material Document and Classification | QQ-B-637 COMP I FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Flow Control Device | DISK |
| Features Provided | MANUAL OVERRIDE |
| Material | NICKEL ALLOY SEAT |
| Valve Size | 3.500 INCHES IN |
| Bonnet Attachment Method | BOLTED |
| Adjustable Pressure Range | +11.0 TO 17.0 POUNDS PER SQUARE INCH LBS |
| Material Document and Classification | MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Material Document and Classification | 11-N-268 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Nondefinitive Spec/std Data | A-1 TYPE AND C CLASS |
| Material Document and Classification | MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| NMP611 OP A, DISC AY, FW SERVICE PRIMARY | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| NMP611 | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
| MIL-V-20065 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| L-2210-C 3.5" 11TO17PSI | Emerson Automation Solutions Final Control Us Lp Div Navy Product Team (USA) |
NSN 4820-01-538-2850 is a Valve,safety Relief, manufactured by Emerson Automation Solutions Final Control Us Lp Div Navy Product Team, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-538-2850 has 4 cross-referenced part numbers: NMP611 OP A, DISC AY, FW SERVICE (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), NMP611 (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team), MIL-V-20065 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), L-2210-C 3.5" 11TO17PSI (Emerson Automation Solutions Final Control Us Lp Div Navy Product Team).
There are 2 known substitutes for 4820-01-538-2850: 4820-01-533-9099, 4820-01-538-2868. Verify interchangeability with system specifications before substitution.
Key specifications for NMP611 OP A, DISC AY, FW SERVICE: Connection Type: FLANGE ALL ENDS; Style Designator: ANGLE FLANGED ENDS; Second Connection Face to Centerline Distance: 5.500 INCHES IN; Bolt Circle Nominal Diameter: 6.062 INCHES ALL ENDS IN. 30 total characteristics are documented in the Federal Logistics Information System.