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Brand: Danfoss
Danfoss EV212B Isolating Diaphragm Solenoid Valve
Description
EV212B direct-operated solenoid valve with isolating diaphragm
The Danfoss EV212B is a small direct-operated 2/2-way solenoid valve with a stainless steel body and an isolating FKM diaphragm that keeps the medium away from the armature. That construction lets the valve handle dirty, aggressive or lime-forming fluids that would stick a conventional plunger valve, and it is used in dosing, filling, washing and cleaning equipment, pump cooling lines, and marine sampling lines. Seven Star LLC supplies the EV212B in Oman and the GCC as an independent supplier in Muscat; this page gives the ranges, ordering structure and installation points needed to request the correct variant.
EV212B technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Danfoss EV212B (series; code numbers 032U3576 to 032U3762 for the NC versions) |
| Function | 2/2-way, normally closed (NC), direct operated with isolating diaphragm |
| Body material | Stainless steel W.no. 1.4404 / AISI 316L |
| Orifice (DN) | 2, 3, 4 and 4.5 mm |
| Connections | G1/8, G1/4 and G3/8 to ISO 228/1 |
| Kv value | 0.15, 0.3, 0.38 and 0.55 m³/h for DN 2, 3, 4 and 4.5 |
| Differential pressure | 0 to 12 bar (min. opening differential 0 bar); 6 to 12 bar depending on orifice and coil |
| Test pressure | 18 bar for DN 2 to 4; 15 bar for DN 4.5 |
| Seals | FKM diaphragm and O-rings; silicone oil above the diaphragm |
| Media temperature | 0 to 50 °C |
| Ambient temperature | Maximum 50 °C |
| Viscosity | Up to 50 cSt |
| Coil enclosure | Up to IP67 with clip-on coil |
| Weight (without coil) | 0.29 to 0.33 kg |
How the isolating diaphragm works
In the normally closed version a closing spring presses the isolating diaphragm onto the orifice. When the coil is energised, the armature lifts the diaphragm clear of the orifice and flow starts, and the valve remains open as long as voltage is present. When voltage is removed the spring closes it. Because the diaphragm separates the fluid from the armature chamber, which is filled with silicone oil, impurities and aggressive media never reach the moving armature. Danfoss lists this as the reason the valve suits fluids with particles, scaling tendencies or alkaline cleaning agents.
EV212B ordering range and orifice options
| Connection / orifice | Kv value and code number (NC, stainless steel body) |
|---|---|
| G1/8 / 2 mm | 0.15 m³/h, code 032U3576 |
| G1/4 / 2 mm | 0.15 m³/h, code 032U3578 |
| G1/8 / 3 mm | 0.3 m³/h, code 032U3581 |
| G1/4 / 3 mm | 0.3 m³/h, code 032U3751 |
| G3/8 / 4 mm | 0.38 m³/h, code 032U3754 |
| G1/4 / 4.5 mm | 0.55 m³/h, code 032U3590 |
| G3/8 / 4.5 mm | 0.55 m³/h, code 032U3762 |
The valve body is ordered without a coil. The coil is a separate item chosen for the control voltage. The datasheet lists high-performance clip-on coils such as BB024AS (24 V, 50 Hz, 11 W), BB230AS (220–230 V, 50 Hz, 11 W), and latching DC coils BB012DS (12 V DC) and BB024DS (24 V DC), plus BR marine coils for 24 V and 110 V.
Pressure limits depend on the coil and orifice
The maximum differential pressure varies with the orifice and coil. For the 2 and 3 mm orifices the maximum is 12 bar on the AC coils (10 bar on the 60 Hz coil), while the 4 mm orifice on G3/8 falls to 7.5 bar for 50 Hz AC coils and 6 bar for 60 Hz. The 4.5 mm orifice is rated 6 bar for 50 Hz AC and 5 bar for 60 Hz AC, rising to 10 bar with DC coils. Always check the exact coil and orifice before selecting.
EV212B compared with other Danfoss solenoid valve types
The EV212B is a small direct-operated valve: it needs no minimum pressure difference to open, which is why the datasheet lists a minimum opening differential of 0 bar. Servo-operated valves such as the EV220B and EV220W carry larger flows but need a minimum differential pressure to lift the diaphragm. Choose the EV212B when flow is a few litres per minute at most, when the medium is dirty or chemical, or when the valve must open at zero pressure difference; choose a larger servo valve when the flow requirement exceeds the 0.55 m³/h Kv of the largest orifice.
Selection and ordering checklist
- Medium, its aggressiveness and any solids, and its viscosity (maximum 50 cSt).
- Required flow: choose the orifice from the Kv values above, and check the differential pressure.
- Connection thread G1/8, G1/4 or G3/8.
- Coil voltage and frequency, AC or DC, and any marine coil requirement.
- Medium temperature (0 to 50 °C) and ambient limits near hot equipment.
- Whether FKM seals are compatible with the chemical in use.
Installation, commissioning and maintenance
Danfoss recommends a 50-mesh (297 micron) filter in front of the valve. In water applications, exercise the valve at least once every 24 hours by changing its state to minimise the risk of sticking from calcium carbonate, zinc or iron oxide build-up. For water, the maker recommends hardness of 6 to 18 °dH to avoid scaling, conductivity of 50 to 800 µS/cm to limit dezincification, and avoiding stagnant water above 25 °C inside the valve. Mount according to the mounting-angle diagram in the datasheet, and do not touch the coil while energised for long periods as it runs hot.
Typical applications in Oman and the GCC
In Oman and the Gulf the EV212B is used for chemical dosing skids at water treatment plants, sampling lines in ballast water treatment and marine systems, wash-down equipment in food and beverage plants, cooling lines for vacuum pumps, and small filling machines. Brackish or hard water makes the filter and exercise routine important, and the stainless body helps in coastal installations.
Information to send with an RFQ
- Type, orifice and connection, or code number.
- Coil voltage, frequency and coil type.
- Medium, concentration, temperature and pressure.
- Quantity and delivery location in Oman or the GCC.
Documents and quotation
A Danfoss datasheet for the EV212B solenoid valve is attached on this page.
Send the connection, orifice and coil data and we will confirm the matching valve and coil.
Datasheets & Documents
- Datasheet Danfoss EV212B Datasheet Download
Reviews (0)
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.
FAQ
Questions about the Danfoss EV212B Isolating Diaphragm Solenoid Valve
Answers from our engineering team on installation, compatibility and integration.
01What does the isolating diaphragm do?
It separates the medium from the armature chamber, which is filled with silicone oil, so dirt, scale or aggressive fluids cannot reach the moving parts.
02What connections does the EV212B have?
The datasheet lists G1/8, G1/4 and G3/8 to ISO 228/1 with orifices of 2, 3, 4 and 4.5 mm.
03What is the media temperature range?
FKM sealing allows 0 to 50 degrees C media temperature, and ambient temperature up to 50 degrees C.
04Is a coil included with the valve body?
No. The valve body is listed separately from the coil, so a coil must be chosen for the voltage, for example BB024AS for 24 V AC.
05How often should the valve be exercised in water service?
Danfoss recommends changing the valve state at least once every 24 hours to reduce the risk of sticking from build-up.
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