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Brand: Danfoss
Danfoss 148B5605 REG-SB 40 Hand Regulating Valve, Socket Weld
Description
REG-SB 40: a larger-flow hand regulating valve for 40 mm lines
Danfoss 148B5605 is an REG-SB 40 hand regulating valve with 40 mm (1 1/2 in) socket-weld connections to ASME B 16.11. The SB version has the larger flow area: 531 mm2 (0.823 in2) at DN 40, with a Kv value of 20 m3/h and a net weight of 2.4 kg. A cap protects the spindle.
It shares the 52 bar (754 psig) working pressure and -60 to 150 C temperature range with the rest of the SVL Flexline family. Approvals listed are CE, CRN, EAC and UA, and the flow direction is shown by an embossed arrow.
Technical specifications
| Parameter | Specification |
|---|---|
| Danfoss code number | 148B5605 |
| Type | REG-SB 40 |
| Approvals as listed | CE; CRN; EAC; UA |
| Body material | Steel |
| Connection standard | ASME B 16.11 |
| Flow area | 531 mm2 |
| Inlet connection size | 1 1/2 in / 40 mm |
| Inlet connection type | Socket Weld |
| Kv value | 20 m3/h |
| Maximum working pressure | 52 bar |
| Outlet connection size | 1 1/2 in / 40 mm |
| Outlet connection type | Socket weld |
| Refrigerants | R134a; R22; R290; R401A; R402A; R404A; R407A; R407B; R407C; R407F; and others listed in the data sheet |
| Temperature range | -60 C to 150 C |
| Net weight | 2.4 kg |
| EAN | 5702428474160 |
Where the SB flow area is chosen
Choose the SB when the application needs high flow with manual adjustment: liquid transfer and balancing lines, oil return, defrost-gas and by-pass lines of ammonia and CO2 plants. For fine metering of small flows the smaller SA version is more suitable.
The valve is angleway, so the flow turns 90 degrees through the body. The graduated spindle indicates the opening, and the setting can be locked by recording the number of turns on the commissioning sheet.
Checks before ordering
Confirm the connection (socket weld here; butt weld and stainless variants exist as other codes), pipe schedule and the refrigerant. The data sheet gives the Kv per number of turns and the weights of all sizes between 10 and 65 mm.
Install with the arrow in flow direction and follow the SVL Flexline welding instructions. Spare parts exist for the platform, so cone, seal and bonnet can be replaced without cutting the line.
When commissioning, count and record the turns from closed for each duty setting; a regulating valve left at an unrecorded position is a common reason for a plant that no longer balances after maintenance.
Other types and sizes from the same Danfoss family that appear in the Danfoss store listing include REG-SB SS 15 (148B4937), REG-SB SS 25 (148B4946), REG-SB SS 10 (148B5018), REG-SB 10 (148B5103), REG-SB 15 (148B5203), REG-SB 20 (148B5303), REG-SB SS 20 (148B5389), REG-SB 25 (148B5403). These are listed for orientation only; each has its own datasheet values, so check size, connection and version before ordering.
Documents and quotation
The reference document for this code is the Danfoss Hand operated regulating valve, type REG-SA and REG-SB 10-65 AI189386433903en-001601 (manufacturer, unaltered), attached as the unaltered manufacturer PDF. See also globe and stop valves. Request a price for 148B5605 by sending the quantity; Seven Star LLC is an independent supplier in Muscat.
Datasheets & Documents
- Datasheet Danfoss Hand operated regulating valve, type REG-SA and REG-SB 10-65 AI189386433903en-001601 (manufacturer, unaltered) Download
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About brand
Danfoss is the Danish engineering group that makes refrigeration and air-conditioning controls, heating components, variable speed drives and mobile hydraulics. Mads Clausen founded it on 1 September 1933 at his parents' farm in Nordborg on the island of Als, after making his first refrigeration expansion valve in 1932. Nordborg is still the group's headquarters, and Danfoss remains controlled by the Clausen family through the Bitten & Mads Clausen Foundation.
Danfoss company profile
| Founded | 1 September 1933, Nordborg, Denmark, by Mads Clausen (1905–1966) |
|---|---|
| First product | Thermostatic expansion valve for refrigeration |
| Headquarters | Nordborg, Denmark |
| Ownership | Private; majority controlled by the Bitten & Mads Clausen Foundation and the Clausen family |
| Size | About 42,000 employees (2023) |
| Business segments | Danfoss Climate Solutions (refrigeration, air conditioning and heating), Danfoss Drives (VLT and VACON frequency converters, soft starters), Danfoss Power Solutions (mobile and industrial hydraulics) |
| Brands in the group | VLT, VACON, Eaton Hydraulics (bought 2021), Ikusi radio remote controls |
Milestones
- 1932–1933: First expansion valve; the company is founded in Nordborg.
- 1939: 26 employees. By the 10th anniversary in 1943 the company has 179.
- 1950s: Rapid growth turns Nordborg into a Danfoss town with housing and schools for its workforce.
- 1968: Danfoss launches its VLT frequency converter, one of the first mass-produced AC drives.
- 2014: Acquisition of the Finnish drives maker Vacon, now the VACON brand.
- 2021: Acquisition of Eaton's hydraulics business.
Choosing Danfoss products
For solenoid valves, check the operating principle. A direct-operated valve such as EV210B opens even at 0 bar differential pressure. A servo-operated valve such as EV220B needs a minimum differential (typically about 0.3 bar) to open, while an assisted-lift valve such as EV250B works from 0 bar. Coils are ordered separately, so the voltage on the coil (for example 230 V AC or 24 V DC) must match the control circuit. For drives, the VLT family is split by application: FC 51 Micro Drive for small machines, FC 102 HVAC Drive for fans and pumps in buildings, FC 202 AQUA Drive for water, and FC 302 AutomationDrive for demanding industrial duty.
Where Danfoss products are used
In Oman and the GCC, Danfoss drives run pumps, fans and compressors in district cooling plants, water and wastewater stations, desalination and building HVAC. Danfoss pressure switches, transmitters and solenoid valves are built into chillers, refrigeration plants, boilers and hydraulic systems, and AB-QM valves balance chilled-water circuits in large buildings.
Danfoss products we list
| Family | Examples |
|---|---|
| Variable speed drives and soft starters | VLT Micro Drive FC 51, VLT HVAC Drive FC 102, VLT AQUA Drive FC 202, VLT AutomationDrive FC 302, FC 280, iC2-Micro, VACON NXP, MCD 600 soft starter |
| Solenoid valves and coils | EV220B, EV210B, EV250B, EV225B steam, EVR 25, AM230C coil |
| Pressure switches and thermostats | KP 37, KP 44, RT 200, CS, MBC 5000, KPS 77, RT 101 |
| Pressure transmitters | MBS 3000, MBS 5100, MBS 3250, MBS 4251 Ex, AKS 33, DST P92S SIL 2 |
| HVAC and refrigeration valves | AB-QM PICV, NovoCon S, AB-PM, AVTA, ICV, TE 5 element |
Ordering Danfoss products: what we need
Send the Danfoss code number from the label (for example 032U7115 or 131B0149) or the full drive type code (FC-302P3K0T5...). For drives, add the motor power, supply voltage and any fieldbus option. For valves, add the size, connection, medium and coil voltage. For pressure switches and transmitters, add the range, output and pressure connection.
Facts checked against Danfoss's company history pages and published company data, October 2026.
Browse Danfoss products by category: AC Drives, Pressure Instrumentation, Control Valves, Solenoid Valve.
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Frequently Asked Questions
What is Danfoss 148B5605?
An REG-SB 40 hand regulating valve, steel, 40 mm socket-weld connections.
What is the flow area?
531 mm2 (0.823 in2), Kv 20 m3/h.
How does SB differ from SA?
SB has the larger flow area for the same connection size.
What are the limits?
52 bar (754 psig) and -60 to 150 C.
Which document is attached?
The Danfoss REG-SA and REG-SB 10-65 data sheet AI189386433903en-001601.
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