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Datasheet generated 2026-10-09
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Danfoss REG-SB 50 straightway hand-operated regulating valve, 50 mm (2 in) socket weld ASME B 16.11, steel, 52 bar (code 148B5725)

Danfoss · HVAC & Refrigeration · Globe Valves · Denmark · danfoss.com
Part Number
148B5725  ·  HS 8481.80
Danfoss REG-SB 50 straightway hand-operated regulating valve, 50 mm (2 in) socket weld ASME B 16.11, steel, 52 bar (code 148B5725)

Danfoss REG-SB 50 hand-operated regulating (throttling) valve, store code 148B5725, straightway steel body. The REG-SB (large flow area) is a precision regulating valve in the SVL Flexline range used to set liquid, suction, hot-gas and oil flow in industrial refrigeration; a scaled spindle gives repeatable manual throttling and the back-seating spindle allows the packing to be serviced in operation. Nominal size 50 mm (2 in), socket weld connections to ASME B 16.11; flow coefficient Kv 45 m3/h (Cv 52.02 gal/min). Steel housing. Maximum working pressure 52 bar g (754 psig); media temperature -60 to 150 C (-76 to 302 F). net weight 3.919 kg, gross weight 6.414 kg. Conformity assessment PED 2014/68/EU, Category II. Applicable to R717 (ammonia), R744 (CO2) and fluorinated refrigerants and oils. Specifications per Danfoss store code 148B5725.

Technical Specifications

TypeREG-SB 50 hand-operated regulating valve (SVL Flexline)
Code number148B5725
SeriesREG-SB (large flow area)
Nominal size50 mm (2 in)
Flow direction bodyStraightway
Connectionsocket weld both ends, ASME B 16.11
Top equipmentCap
Flow coefficient Kv45 m3/h (Cv 52.02 gal/min)
Housing materialsteel
Maximum working pressure52 bar g (754 psig)
Media temperature range-60 to 150 C (-76 to 302 F)
Applicable mediaR717 (ammonia), R744 (CO2), HFC/HCFC refrigerants and oils
Weightnet weight 3.919 kg, gross weight 6.414 kg
Conformity assessmentPED 2014/68/EU, Category II
ApprovalsCE, EAC
EAN5702428482196
Net weight3.919 Kilogram
Product groupShut-off and regulating valves
ApprovalCE
Body materialSteel
CE markYes
China RoHS complianceYes
Colour PaintReddish brown
Connection materialSteel
Connection standardASME B 16.11
Cv value [gal/min]52.2 gal/min
DirectionStraightway
EquipmentCap
EU RoHS complianceYes
Flow area [in2]1.274 in²
Flow area [mm2]822 mm²
Flow direction indicatorEmbossed 1-way arrow
Fluid Group1
Inlet connection size [in]2 in
Inlet connection size [mm]50 mm
Inlet connection typeSocket weld
Kv value [m³/h]45 m³/h
Max. Working Pressure [bar]52 bar
Max. Working Pressure [psig]754 psig
NeckStandard
Outlet connection size [in]2 in
Outlet connection size [mm]50 mm
Outlet connection typeSocket weld
PED categoryII
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
Valve versionStandard version

Properties

MaterialSteel
Pressure rating52 bar
Temperature range-60 to 150 C
Primary standardASME B 16.11
Standard size50 mm
MOQ1

Compatibility

Danfoss SVL Flexline REG-SB 50 regulating valve. REG-SB carries the larger flow area; REG-SA is the fine low-flow variant. Select by flow direction (straightway) and connection (ASME B 16.11). Shares the SVL Flexline platform with SVA-S/SVA-L shut-off valves, SCA-X/CHV-X check valves and FIA strainers of the same nominal size.

Standards

Approvals

Attached Documents