Danfoss offers an exceptionally wide range of high performance solenoid valves, available in direct-operated, servo-operated and assisted lift versions. An easy, economical way to control and regulate fluids and non-flamable gases. Danfoss solenoid valve bodies and electrical coils are normally supplied separately and then combined, but the valves are also available as complete units if required.
More than 90 percent of global trade is transported by sea. As a ship's cargo is unloaded and loaded, ballast water is pumped in and out to maintain the vessel's stability – this equates to around 12 billion tons every year.
Solenoid valves with FKM isolating diaphragm for aggressive media, suited for ballast water treatment systems.
This article explores the challenge of ballast water and the solutions required to comply with the new regulation.
Ensuring that a solenoid valve coil is working properly, or detecting a faulty one, is an important step in many repair or installation projects.
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We offer a general B valve series with a high capacity and the A series is more economic and compact. Danfoss solenoid valves are assembled quickly and simply without tools, providing optimum product flexibility and availability. A coil can be replaced if needed without stopping or draining the system.
Our solenoid valve program includes valves for air, steam, oil, and gas, suiting a number of industrial applications that require high performance in these and other applications:
WRAS and RISE approved solenoid valves ensure your compliance. Danfoss solenoid valves are the clever choice for installers and the safe choice for drinking water.
Solenoid valves for drinking water
Clip-on coil
Coil range up to IP67
Best water hammer damping
Long lifetime and high performance
Insensitive to dirt
Broad range and customized solutions
- an easy way to control and regulate fluids.
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EV225B is a servo-operated 2/2-way solenoid valve for use in steam applications. The design is based on a PTFE diaphragm concept, ensuring highly reliable function when used in connection with contaminated steam. Each valve body is made of dezincification resistant brass and the valve seats are made of stainless steel. This ensures a long life, even when used with highly aggressive steam.
EV250BW 10-22 is an assisted lift operated 2/2-way solenoid valve. The valve body is made of ECO brass and uses next-generation EPDM sealings. The valve is a compact valve used for process water with low differential pressure, e.g. process inlet and drinking water applications where drinking water approvals as RISE, SINTEF, ACS, PZH and WRAS are required.
The EV220BW is an indirect servo-operated 2/2-way solenoid valve designed for drinking water and it is available in NC or NO. Valve sealings are available in EPDM, and the valve body in ECO brass or stainless steel. Wetted materials in accordance with 4MSI, DVGW, KTW – W270, and the valve program has RISE, SINTEF, WRAS, ACS and PZH approvals as well for cold and hot water applications.
EV220S is a range of streamlined compact servo-operated 2/2-way solenoid valves with connections from 1/4" to 2", special designed to fit in applications where space is limited
EV221BW 10-22 is a direct servo-operated 2/2-way solenoid valve. The valve body is made of ECO brass and uses next-generation EPDM sealings. The valve has a built-in pilot filter, which makes it the ideal choice for water inlet and drinking water applications where drinking water approvals as RISE, SINTEF, ACS or PZH are required.
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Find the most suitable solenoid valve and coil for your project from the Danfoss product portfolio.
Check coil supply: Is supply activated? If not – supply or fuse may be defect.
Use a magnetic detector. Lift coil slightly and note whether it offers resistance against lifting. Eventually use a permanent magnet. NOTE: Never remove a coil with voltage applied for more than 2 seconds – it may burn out.
Check to make sure the coil’s electrical requirements are the same as the installation supply.
Check coil data. If necessary, replace coil with correct version. Reduce differential pressure, e.g. by limiting inlet pressure.
Check valve body data and differential pressure. If necessary, replace valve body with correct version.
Replace valve.
Clean orifice with needle or similar (max diameter 0.5 mm). Blow clean with compressed air. If necessary, replace defective component(s).
Clean pilot hole with a pin or needle.
Check valve data, incl. differential pressure. Replace valve with correct version.
Clean diaphragm. If necessary, replace defective component(s).
Clean valve. If necessary, replace defective component(s).
First lift coil slightly and note whether it offers resistance against lifting.NOTE: Never remove a coil with voltage applied for more than 2 seconds – it may burn out
Check valve data.Check pressure and liquid flow.Check rest of installation. Replace valve with a more suitable alternative.
Check pressure and liquid flow. Replace defective component(s).
Check correct installation of valve (see instruction/datasheet).
Hum caused by AC frequency can be removed by changing to coil with rectifier.Inspect and clean inside armature and armature tube.Can also be dirt or armature or spring worn out / defect (Replace valve or parts).
See installation guide.Pipes very long and pipe diameter too small.
Check valve data. Check pressure and liquid flow.Check for back pressure.Check rest of installation.Replace valve with a more suitable alternative.
Check coil data. If necessary, change to correct coil type. Check wiring diagram and wiring. Check maximum voltage variation: Permissible voltage variation: +/- 10% for dual frequency; DC and NO applications +10% / -15% for AC on single frequency voltages.
Check coil data and differential pressure and ambience temperatures and media and check with coil and valve specifications.
Clean armature tube and armature. If necessary, replace defective component(s).
Clean diaphragm. If necessary, replace defective component(s) .
First lift coil slightly and note whether it offers resistance against lifting.NOTE: Never remove a coil with voltage applied for more than 2 seconds – it may burn out.
Check valve data.Check pressure and liquid flow.Check rest of installation. Replace valve with a more suitable alternative
Check pressure and liquid flow. Replace defective component(s)
Check correct installation of valve (see instruction/datasheet)
Hum caused by AC frequency can be removed by changing to coil with rectifier.Inspect and clean inside armature and armature tube.Can also be dirt or armature or spring worn out / defect (Replace valve or parts)
Pressure sensors from Danfoss Sensing Solutions help Danfoss Semco control water level in vital firefighting systems delivered to customers around the world. The innovative use of MBS 9200 provides substantial savings in assembly costs.
Increased focus on the environmental impact from the Marine industry drives new exhaust gas emission restrictions and regulation. The new regulation forces vessel owners and shipbuilders to implement new technical solutions to ensure compliance with local, regional and global legislation.