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Datasheet generated 2026-10-09
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Danfoss REG-LB 25-40 function module (Top Complete) for hand regulating valve, SVL Flexline (code 148B6404)

Danfoss · HVAC & Refrigeration · Globe Valves · Denmark · danfoss.com
Part Number
148B6404  ·  HS 8481.90
Danfoss REG-LB 25-40 function module (Top Complete) for hand regulating valve, SVL Flexline (code 148B6404)

Danfoss REG-LB 15-20/25-40 series function module (Top Complete) for the SVL Flexline hand regulating valve, code 148B6404. Supplied as a complete top assembly — 1 gasket, top part and 4 bolts — with a long neck for insulation. Flow area 531 mm2 (0.823 in2). Maximum working pressure 52 bar (754 psig); media temperature range -60 to 150 C (-76 to 302 F). Used for products REG-LB 25; REG-LB 32; REG-LB 40. The SVL Flexline design lets the function module be exchanged on an installed valve body without cutting the valve out of the line. For HCFC, non-flammable HFC, R717 (ammonia) and R744 (CO2) systems.

Technical Specifications

TypeREG-LB function module (Top Complete)
Code number148B6404
SeriesSVL Flexline REG-LB
Product groupShut-off and regulating valves
Type designationTop Complete
Parts included1 gasket; top part; 4 bolts
Connection neckLong
Flow area531 mm2 (0.823 in2)
Maximum working pressure52 bar (754 psig)
Media temperature range-60 to 150 C (-76 to 302 F)
Used for productsREG-LB 25; REG-LB 32; REG-LB 40
Weightnet 2.474 kg, gross 3.258 kg
EAN5702428818131
Net weight2.474 Kilogram
ApprovalCE
China RoHS complianceYes
EquipmentCap
EU RoHS complianceYes
Flow area [in2]0.823 in²
Flow area [mm2]531 mm²
Max. Working Pressure [bar]52 bar
Max. Working Pressure [psig]754 psig
NeckLong
REACH Candidate List substancesNo
RefrigerantsR134a
Temperature range [°C] [max]150 °C
Temperature range [°C] [min]-60 °C
Temperature range [°F] [max]302 °F
Temperature range [°F] [min]-76 °F
Used for productREG-LB 25
Used for product commentsLong neck for insulation

Properties

Pressure rating52 bar
Temperature range-60 to 150 C
MOQ1

Compatibility

Danfoss SVL Flexline REG-LB function module (spare top). Fits the REG-LB 25; REG-LB 32; REG-LB 40 valve bodies. Confirm the valve size/series and refrigerant before ordering; the module exchanges on an installed body without cutting it out of the line.

Attached Documents