NSN 4820-00-244-2450 · NIIN 002442450 · Part number TCL3FWA2
Emerson Electric Co Alco Controls Div · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 70255
Government record, cited
NSN 4820-00-244-2450 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-244-2450. Manufacturer of record part number: TCL3FWA2.
Second End Relationship with First End: NOT IDENTICAL
Body Style: ANGLE GIVE "ADQM" OR "ADQN" IF FLANGED ONE OR TWO ENDS
Mounting Method: CLAMP BULB
Refrigeration Capacity in Btu Per Hour: 42.000
End Connection Quantity: 2
Identification
NSN: 4820-00-244-2450
NIIN: 002442450
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: TCL3FWA2
Manufacturer: Emerson Electric Co Alco Controls Div
General Description
The Valve,expansion, cataloged under National Stock Number 4820-00-244-2450, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Emerson Electric Co Alco Controls Div. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 10 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-00-244-2450
Primary Part Number
TCL3FWA2
Item Name
Valve,expansion
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Emerson Electric Co Alco Controls Div
Status
ACTIVE
Flow Control Device
DISK, TOP GUIDED
Temp Rating
250.0 FAHRENHEIT DEGF
Second End Relationship with First End
NOT IDENTICAL
Body Style
ANGLE GIVE "ADQM" OR "ADQN" IF FLANGED ONE OR TWO ENDS
Mounting Method
CLAMP BULB
Refrigeration Capacity in Btu Per Hour
42.000
End Connection Quantity
2
Capillary Tube Length
180.000 INCHES NOMINAL IN
First End Connection Type
UNTHREADED INTERNAL TUBE
Valve Evaporator Temp Range Designation
HIGH
Bulb Media Type
REFRIGERANT 12
First End Outside Diameter Tube Accommodated
0.500 INCHES NOMINAL IN
Material
COPPER ALLOY BODY
Material
STEEL CORROSION RESISTING FLOW CONTROL DEVICE
Material
COPPER ALLOY SEAT
Valve Expansion Control Type
THERMOSTATIC
Media for Which Designed
REFRIGERANT 12
Second End Connection Type
UNTHREADED INTERNAL TUBE
Second End Outside Diameter Tube Accommodated
0.625 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
⇄Related Items10
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
4820-00-244-2454TCLN6112FWPOSSIBLE MATCH
VALVE,EXPANSION
Possible match (shared part number)Emerson Electric Co Alco Controls Div
4820-00-244-2504TCLN0FA10DPOSSIBLE MATCH
VALVE,EXPANSION
Possible match (shared part number)Emerson Electric Co Alco Controls Div
4820-00-256-6662PCN035371POSSIBLE MATCH
VALVE,EXPANSION
Possible match (shared part number)Emerson Electric Co Alco Controls Div
4820-00-256-6677TCLN1FWODFEE3/8X1/20DFANGPOSSIBLE MATCH
VALVE,EXPANSION
Possible match (shared part number)Emerson Electric Co Alco Controls Div
4820-00-256-6680TCLN1FWPOSSIBLE MATCH
VALVE,EXPANSION
Possible match (shared part number)Emerson Electric Co Alco Controls Div
4820-00-256-6684TCLN2FWPOSSIBLE MATCH
VALVE,EXPANSION
Possible match (shared part number)Emerson Electric Co Alco Controls Div
4820-01-195-6362X23048-HW-2CPOSSIBLE MATCH
POWER ASSEMBLY
Possible match (shared part number)Emerson Electric Co Alco Controls Div
4820-01-450-7646XBN-1019 MW-6EPOSSIBLE MATCH
REGULATOR,THERMOSTATIC TEMPERATU
Possible match (shared part number)Emerson Electric Co Alco Controls Div
4820-01-450-7648XBN-1019 MW 35-4EPOSSIBLE MATCH
REGULATOR,THERMOSTATIC TEMPERATU
Possible match (shared part number)Emerson Electric Co Alco Controls Div
4820-01-450-8591TCLN1/2-MW35-3/8X5/8-6CPOSSIBLE MATCH
VALVE,EXPANSION
Possible match (shared part number)Emerson Electric Co Alco Controls Div
C/1Advisory reference — outside the item-of-supply concept
Emerson Electric Co Alco Controls Div
Related Parts
4820-00-244-2454POSSIBLE MATCH
VALVE,EXPANSION
TCLN6112FW
4820-00-244-2504POSSIBLE MATCH
VALVE,EXPANSION
TCLN0FA10D
4820-00-256-6662POSSIBLE MATCH
VALVE,EXPANSION
PCN035371
4820-00-256-6677POSSIBLE MATCH
VALVE,EXPANSION
TCLN1FWODFEE3/8X1/20DFANG
4820-00-256-6680POSSIBLE MATCH
VALVE,EXPANSION
TCLN1FW
4820-00-256-6684POSSIBLE MATCH
VALVE,EXPANSION
TCLN2FW
4820-01-195-6362POSSIBLE MATCH
POWER ASSEMBLY
X23048-HW-2C
4820-01-450-7646POSSIBLE MATCH
REGULATOR,THERMOSTATIC TEMPERATU
XBN-1019 MW-6E
4820-01-450-7648POSSIBLE MATCH
REGULATOR,THERMOSTATIC TEMPERATU
XBN-1019 MW 35-4E
4820-01-450-8591POSSIBLE MATCH
VALVE,EXPANSION
TCLN1/2-MW35-3/8X5/8-6C
Frequently Asked Questions
What is NSN 4820-00-244-2450?
NSN 4820-00-244-2450 is a Valve,expansion, manufactured by Emerson Electric Co Alco Controls Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-00-244-2450?
NSN 4820-00-244-2450 has 1 manufacturer part number on file: TCL3FWA2 (Emerson Electric Co Alco Controls Div).
What NSN replaces 4820-00-244-2450?
10 possible matches (shared part number, not a government interchangeability claim): 4820-00-244-2454, 4820-00-244-2504, 4820-00-256-6662. Verify interchangeability with system specifications before substitution.
What are the specifications of TCL3FWA2?
Key specifications for TCL3FWA2: Flow Control Device: DISK, TOP GUIDED; Temp Rating: 250.0 FAHRENHEIT DEGF; Second End Relationship with First End: NOT IDENTICAL; Body Style: ANGLE GIVE "ADQM" OR "ADQN" IF FLANGED ONE OR TWO ENDS. 19 specifications are documented in the U.S. Government catalog.
Is NSN 4820-00-244-2450 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.