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Brand: Danfoss
Danfoss 148B4823 SVA-DH 250 Shut-off Valve, 250 mm Butt Weld
Description
SVA-DH 250: a 10 in stop valve for the largest refrigeration mains
Danfoss 148B4823 is an SVA-DH 250, a very large angle stop valve with 250 mm (10 in) butt-weld connections to EN 10220. The DH stands for Delta Pressure High, the version for higher operating pressure differentials at these sizes. The Kv value is 1610 m3/h and the net weight is 127.67 kg.
The printed ratings are a maximum working pressure of 40 bar (580 psig) and a temperature range of -60 to 150 C. The page shows a cap as the equipment, CE and UA approvals, and a reddish brown paint finish.
Technical specifications
| Parameter | Specification |
|---|---|
| Danfoss code number | 148B4823 |
| Type | SVA-DH 250 |
| Approvals as listed | CE; UA |
| Connection standard | EN 10220 |
| Inlet connection size | 10 in / 250 mm |
| Inlet connection type | Butt weld |
| Kv value | 1610 m3/h |
| Maximum working pressure | 40 bar |
| Outlet connection size | 10 in / 250 mm |
| Outlet connection type | Butt weld |
| Refrigerants | R113; R114; R1150; R1234yf; R1234ze(E); R125; R1336mzz(Z); R134a; R152a; R170; and others listed in the data sheet |
| Temperature range | -60 C to 150 C |
| Net weight | 127.67 kg |
| EAN | 5715162735107 |
Very large ammonia and CO2 mains
At this size the valve isolates main suction headers, large vessels and heat-rejection lines on big industrial and cold-storage plants, where the 250 mm line carries flow in the thousands of cubic metres per hour range. A low-drop angle pattern saves an elbow in tight machinery rooms.
The DH and DL variants are covered by one data sheet (SVA DH and DL 250 – 300), which also gives dimensions and weights for the 300 mm size. The 40 bar rating is lower than the 52 bar of smaller SVA valves, so verify the design pressure of the system. Large valves like this are normally ordered together with the matching pipe stubs and a lifting plan, because the weld preparation, the support spacing and the access space around the cap all have to be agreed with the pipe designer before the valve arrives on site.
Handling and ordering points
A valve of 127 kg needs lifting gear and temporary supports before welding. Follow the installation guide for SVA-DL and SVA-DH 250-300 for the welding sequence, seat protection and bonnet torque, and fit the pipe supports on both sides.
Confirm the connection standard, the pipe wall thickness, the working pressure class and the opening mechanism (cap with key, or an optional handwheel arrangement) before ordering. The listing shows no spare-part program for this large size, so check availability of seals with the manufacturer documentation.
Check the building structure too: a valve of this weight is a significant point load on the pipe rack, and the access space for the key or the cap should be allowed for in the plant layout before steelwork is fixed.
Documents and quotation
The reference document for this code is the Danfoss Shut-off valves, Type SVA DH and SVA DL 250 – 300 AI177086432445en-001001 (manufacturer, unaltered), attached as the unaltered manufacturer PDF. See also globe and stop valves. Request a price for 148B4823 by sending the quantity; Seven Star LLC is an independent supplier in Muscat.
Datasheets & Documents
- Datasheet Danfoss Shut-off valves, Type SVA DH and SVA DL 250 – 300 AI177086432445en-001001 (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 148B4823?
An SVA-DH 250 stop valve with 250 mm (10 in) butt-weld connections for large refrigeration mains.
What does DH mean?
Delta Pressure High, the variant for higher operating differentials at large sizes.
How heavy is it?
127.67 kg net, so lifting equipment and supports are required.
What are its pressure and temperature limits?
Maximum working pressure 40 bar (580 psig) and -60 to 150 C.
Which document is attached?
The Danfoss SVA DH and SVA DL 250 - 300 data sheet AI177086432445en-001001.
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