PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

25645Valve,regulating,fluid Pressure

Tyco Fire Products Lp · NSN 4820-00-627-9828 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-627-9828 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-627-9828. Primary manufacturer part number: 25645.
Features
  • Valve,regulating,fluid Pressure — FSC 4820
  • First End Thread Direction: RIGHT-HANDRIGHT-HAND
  • Thread Size and Series/type Designator: 1/4-18 NPT FIRST END1/4-18 NPT FIRST END
  • Surface Treatment: PAINT OUTSIDEPAINT OUTSIDE
  • Material: RUBBER SYNTHETIC FLOW CONTROL DEVICERUBBER SYNTHETIC FLOW CONTROL DEVICE
  • End Connection Quantity: 22
  • First End Connection Type: THREADED INTERNAL PIPETHREADED INTERNAL PIPE
  • Media for Which Designed: NITROGEN, GASEOUSNITROGEN, GASEOUS
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Rubber Synthetic Flow Control Devicerubber Synthetic Flow Control Device construction
General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-627-9828, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Tyco Fire Products Lp. Government technical data includes 19 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.

Technical Specifications
ParameterValue
NSN4820-00-627-9828
Primary Part Number25645
Item NameValve,regulating,fluid Pressure
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerTyco Fire Products Lp
StatusACTIVE
First End Thread DirectionRIGHT-HANDRIGHT-HAND
Thread Size and Series/type Designator1/4-18 NPT FIRST END1/4-18 NPT FIRST END
Surface TreatmentPAINT OUTSIDEPAINT OUTSIDE
MaterialRUBBER SYNTHETIC FLOW CONTROL DEVICERUBBER SYNTHETIC FLOW CONTROL DEVICE
End Connection Quantity22
First End Connection TypeTHREADED INTERNAL PIPETHREADED INTERNAL PIPE
Media for Which DesignedNITROGEN, GASEOUSNITROGEN, GASEOUS
Flow Control DeviceDIAPHRAGMDIAPHRAGM
Body StyleTEETEE
First End Style DesignatorPLAINPLAIN
Second End Relationship with First EndIDENTICALIDENTICAL
Center to Center Distance3.000 INCHES NOMINAL3.000 INCHES NOMINAL IN
Outlet Pressure Range210.0 TO 230.0 CAMERA MOUNT
Outlet Pressure SettingERR-060
Maximum Inlet Pressure RatingERR-060
FilterINCLUDEDINCLUDED
Valve Loading MethodSPRINGSPRING
Regulation TypeAUTOMATIC SINGLE STAGEAUTOMATIC SINGLE STAGE
MaterialCOPPER ALLOY BODYCOPPER ALLOY BODY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5841-00-091-075825671 INTERCHANGEABLE
Enclosure Assembly
Raytheon Company Dba Raytheon
5133-00-236-3405 INTERCHANGEABLE
Drill,twist
2920-00-293-5189AT3 INTERCHANGEABLE
Spark Plug
Ford Motor Co General Parts Division
5950-00-645-39272564-5 INTERCHANGEABLE
Coil,radio Frequency
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
5305-01-014-848825671 INTERCHANGEABLE
Screw,shoulder
Williams International Co., L.l.c.
5985-01-111-874225645 INTERCHANGEABLE
Coupler,antenna
Narda Holdings, Inc. Dba Narda-Miteq Div Narda-Miteq
3020-01-218-9232 INTERCHANGEABLE
Gear,bevel
6210-01-398-19682567-1 INTERCHANGEABLE
Light Assembly,indicator
Safran Electronics & Defense, Avionics Usa, Llc
5365-01-429-9378 INTERCHANGEABLE
Spacer,ring
5120-01-430-8481 INTERCHANGEABLE
Punch,prick
Cross-Reference Index
Part NumberManufacturer
25671 Tyco Fire Products Lp (USA)
25645 PRIMARY Tyco Fire Products Lp (USA)
Related Parts
5841-00-091-0758INTERCHANGEABLE
ENCLOSURE ASSEMBLY
25671
5133-00-236-3405INTERCHANGEABLE
DRILL,TWIST
2920-00-293-5189INTERCHANGEABLE
SPARK PLUG
AT3
5950-00-645-3927INTERCHANGEABLE
COIL,RADIO FREQUENCY
2564-5
5305-01-014-8488INTERCHANGEABLE
SCREW,SHOULDER
25671
5985-01-111-8742INTERCHANGEABLE
COUPLER,ANTENNA
25645
3020-01-218-9232INTERCHANGEABLE
GEAR,BEVEL
6210-01-398-1968INTERCHANGEABLE
LIGHT ASSEMBLY,INDICATOR
2567-1
5365-01-429-9378INTERCHANGEABLE
SPACER,RING
5120-01-430-8481INTERCHANGEABLE
PUNCH,PRICK
5307-01-473-2757INTERCHANGEABLE
STUD,BALL
4610-01-717-5498INTERCHANGEABLE
FEEDER,CHEMICAL SOLUTION,WATER P
25645

Frequently Asked Questions

What is NSN 4820-00-627-9828?

NSN 4820-00-627-9828 is a Valve,regulating,fluid Pressure, manufactured by Tyco Fire Products Lp, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-627-9828?

NSN 4820-00-627-9828 has 2 cross-referenced part numbers: 25671 (Tyco Fire Products Lp), 25645 (Tyco Fire Products Lp).

What NSN replaces 4820-00-627-9828?

There are 12 known substitutes for 4820-00-627-9828: 5841-00-091-0758, 5133-00-236-3405, 2920-00-293-5189 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 25645?

Key specifications for 25645: First End Thread Direction: RIGHT-HANDRIGHT-HAND; Thread Size and Series/type Designator: 1/4-18 NPT FIRST END1/4-18 NPT FIRST END; Surface Treatment: PAINT OUTSIDEPAINT OUTSIDE; Material: RUBBER SYNTHETIC FLOW CONTROL DEVICERUBBER SYNTHETIC FLOW CONTROL DEVICE. 20 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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