Why does the valve not close?
Answer: Valve issues:
Check if there is dirt in the main orifice.
Check for outside damage of the valve – e.g. has it been dropped? (Bent armature tube)
Check if the equalizing orifice connection is blocked because of dirt or deposits.
- Check pilot filter or pilot drillings.
- Armature is stuck in the armature tube.
Check if the diaphragm function is limited
- Because of wear or swelling (e.g. EPDM seal exposed to oil)
Coils issues (only NO versions):
No voltage on coil
- Lift coil slightly and note whether it offers resistance.
- Note: Never remove a coil with voltage applied - it might burn out.
Incorrect voltage/frequency
- Check to make sure that coil data is the same as the installation data. Measure the operating voltage at the coil.
- Permissible voltage variation:
- V±10% for dual frequency; dc and NO applications
- +10% / -15% for ac on single frequency voltages
- If necessary, replace coil with correct version.
Coil burnt out
- Why is the coil burnt?
- Differential pressure too high (valve will not open and thereby consume too much power)
- Too high ambient or media temperature, outside of specifications.
- Moisture in the coil (the coil IP rating does not fit the application)
Can the Danfoss solenoid valves operate by themselves or do I need to buy other things?
Answer: All solenoid valves require electrical coils to work. The type of coil we recommend with the valve depends on your voltage requirements and other criteria, and the options can be seen the corresponding technical brochure. We also offer valves with coil assembled.
Also often required is a cable plug to fit onto the coil and is for wiring up the electrics to the valve. Often with solenoid valves we recommend a filter, preferably a type with a removable element which can be cleaned. We would also recommend a check valve if the solenoid will experience back pressure. All Industrial Danfoss standard solenoid valves have female thread connections.
What IP ratings do the valves have?
Answer: IP ratings apply to the cable plug which is fitted onto the solenoid coil. Danfoss can supply cable plugs and coils to IP00 (no plug), IP20 (plastic protective cap), IP43 (only steam coils), IP65 (standard DIN plug) or IP67 (standard Danfoss terminalbox). The IP rating is the plug's protection against mechanical and moisture penetration. The first number relates to mechanical penetration and the second number is the moisture penetration - the higher the number, the greater the protection. Our IP67 coils can withstand submersion under water at a depth of 1 m for a period of 1/2 hour.
Why does the solenoid valve not open?
Answer: Coils issues:
• No voltage on coil
- Check whether valve is de-energized open or closed (NO or NC): Use a magnetic detector.
- Lift coil slightly and note whether it offers resistance.
- Note: Never remove a coil with voltage applied - it might burn out.
• No power to the coil (NC version) - check relay contacts, check lead connections and check fuses.
• Incorrect voltage/frequency
- Check to make sure that coil data is the same as the installation data. Measure the operating voltage at the coil.
- Permissible voltage variation:
- V±10% for dual frequency; dc and NO applications
- +10% / -15% for ac on single frequency voltages
- If necessary, replace coil with correct version.
• Coil burnt out
- Why is the coil burnt?
- Differential pressure too high (valve will not open and thereby take a too high consumption of power)
- Too high ambient or media temperature, outside of specifications.
- Moisture in the coil (the coil IP rating does not fit the application)
Valve issues:
• Check for outside damage of the valve – e.g. has it been dropped? (bend armature tube)
• Pilot connection blocked because of dirt or deposits.
- Check the equalizing orifice
- Eventually pilot filter or pilot drillings
- Armature is stocked in the armature tube
• The diaphragm function is limited
- Because of wear out or swelling (EPDM exposed to oil)
Why does the solenoid valve sound wrong (humming)?
How does a higher power rating specified coil influence the MOPD (Max. Opening Pressure Differential)?
I have a coil here - which valve can I use?
Answer: As long as the coil is a Danfoss solenoid valve coil, you can use any valve which is suitable for your application. Danfoss have two main coil systems: Type A, a compact 9 mm coil system, usually black, which fits all valves with A as the 6th letter of the designation, e.g. EV220A. Type B coils, 13.5 mm, are usually blue in colour and fit all valves with B as the 6th designation, e.g. EV220B. For valve and coil selection, please see our internet product catalogue. If you require help in valve selection please contact us.
Can you supply valve coils for hazardous areas?
I need a spare part for my product. Do you have that?
Why does the coil get very hot?
Answer: Coils on solenoid valves can be relative hot when energized continuously, without any problems.
If the coil over time has a malfunction or even starts to melt or burn, there is a technical problem that must be solved. Please check the application conditions like ambient/medium temperature and coil enclosure.
Where can I find approvals and certificates for Danfoss products? E.g. do you have a PED certificate for KP7W?
Do Danfoss products comply with RoHS directive (Restriction of Hazardous Substances)?
Answer: Yes, all declarations of conformity, including RoHS and WEEE, can be found in our internet product catalogue. Look up the product of your interest and find the relevant document either under the Literature link or the Approvals & Certificates link.
I'm looking for a Danfoss code number and I have not found it in any catalogues?
Answer: Som code numbers are not available for all markets, or it may have been replaced by another number.
To resolve the issue, please contact your nearest Danfoss office: http://www.danfoss.com/Contact/Worldwide/
Could I send you a Danfoss part for repair?
Can I test if my solenoid valve is working properly without mounting it in the system?
Answer: Yes, instead of a coil, you can mount our permanent magnet on the valve, manually checking if it opens and closes properly.
Do you offer steam valves complete with coil?
Answer: Yes, the EV215B and EV225B steam valves we have in complete versions with coil.
If you add "84" as an appendix to the code number, you will get a 220-230V 50 Hz version, and a "90" gives you the complete 220V 60 Hz version.
Can Danfoss supply a solenoid valve with the coil mounted?
Answer: In addition to the flexible seperate programme, Danfoss also offers a programme of complete valves (valve body + coil).
To select the appropriate code number, please check our internet catalogue.
Does Danfoss offer a timer for solenoid valves?
Does Danfoss offer products with ATEX certificate (EEx)?
Answer: Yes, you can order solenoid coils, switches, pressure transmitters and temperature sensors with this approval.
Do you have sparepart kits for the EV valves?
Answer: Yes we have spare part kits for every EV type solenoid valve. To select the proper kit, you will need the valve code number - or specifications like type, seal material, orifice diameter and the function type, NO or NC. Please see our internet catalogue for options.
Do you have a Danfoss solenoid valve with code number 018F7251?
What is the difference between the EV220A and EV220B solenoid valves?
Is it possible to order EV225B solenoid steam valves without coil?
I would like to energize my solenoid valve for a short time with a controlled sequence - what could I do?
Answer: You can use our universal electronic timer, type ET20M, which you can set to an interval between 0 and 45 minutes,
and the on-time of 0-15 seconds.
Is it possible to order only the coil for Danfoss solenoid steam valves?
My solenoid valve or coil is making a unpleasant noise, what could I do to fix it?
Answer: It could be a technical problem that you should check first of all - dirt or wear. This problem can be avoided by installing a filter before the valve.
If there is no problem besides the noise, we recommend that you buy a hum-free coil type BN available for 220-230V AC voltage to get a completely noise-free operation.
How do I see if the coil of the valve is energized?
Can you deliver your products worldwide?
Answer: Yes, we have own distribution centres across the world, working together with more than 100 distributors and agents. You can see your nearest distributor or Danfoss office here: http://www.danfoss.com/Contact/Sales_and_Services/
Do you have a complete catalogue showing all your products?
Answer: Our internet product catalogue is the most extensive information source: http://www.danfoss.com/Products/Categories/
Besides these products, Danfoss also produces customer-specific products and solutions that are not visible in the catalogue. Please contact your nearest Danfoss office to discuss your needs and how we can meet them.
Can you deliver products exclusively made for us?
Answer: Yes, we have the possibility to develop products that are unique for one customer subject to individual agreements. The products may differ in appearance, technical features or packaging. Please contact us to discuss your requirements.
Which distribution channels does Danfoss use?
Can I review your stock online?
Where can I find technical drawings of Danfoss products?
Answer: Dimension and function drawings of our products are often part of the products'' technical leaflets. In our internet product catalogue (http://www.danfoss.com/Products/Categories/), find the product of your interest, then follow the Literature link to see available items.
Could I use any Danfoss coil for the B-series valves ?
Answer: No, only the B-series coils will fit the B-series valves. These coils are made for the 13.5 mm armature and are usually blue.
To choose voltage, frequancy and other options, please see our internet catalogue.
Where do I direct commercial or technical questions?
Do you have local stock?
Where can we find your data sheets?
Answer: All relevant literature, including technical brochures, are available on our Web site: http://www.danfoss.com/BusinessAreas/IndustrialAutomation/Documentation/Industrial+Automation+Literature.htm
Do you have local websites in my language?
Is it possible to place orders online?
Is AM230C a Danfoss valve?
Does Danfoss operate globally?
Is Danfoss a German company?
Can I order a solenoid valve with a 380V AC coil assembled?
Can I test the function of a solenoid valve by moving up and down the energized coil?
Answer: No, you should never take off the coil from the valve, when the coil is energized. There is a risk that it will momentally burn down. If you need to test it, you must first of all de-energize the coil.
Danfoss offers a permanent magnet for manually testing valve function.
How can I connect a solenoid valve with a pressure/temperature switch?
Does Danfoss offer B-series coils in 42V a.c. or 48V d.c.?
My solenoid valve is not working. What could be wrong?
Answer: The following has to be checked:
1) The medium can be used for the application
2) Seal material can be used with the medium
2) The diiferential pressure is within the specifications
3) Position of the valve is correct
4) Check the coil input, such as voltage and frequency according to specifications
5) Is the coil burned or disconnected?
6) Secure that the valve and the armature are not blocked with dirt
Can you send me a UL certificate for EV220A and an A-series coil?
Answer: This A-serie of valves and coils are UL recognized, not UL approved, and can therefore not be sold as single components.
Therefore we recommend that you buy the B-series valves and coils, which are all UL listed.
I have some coils from another supplier, Can I use them with the Danfoss valves?
Where can I find some technical information about your products?
Does Danfoss offer a solenoid valve KIWA approval, necessary to approve a water pump module?
Answer: No, but for the EV220B valve we have the English approval WRAS, the French approval ATTESTATION DE CONFORMITE SANITAIRE, ACS and the Polish approval PANSTWOWY ZAKLAD HIGIENY, PZH.
What do I need to know to select the right product?
Can I get quality control plans/process flowcharts/material specifications/FMEA for Danfoss products?
Can you send me literature, brochures or catalogues on your products?
I placed an order through e-commerce. Could you please check the delivery dates and inform me the earliest possible delivery?
Which coil type fits the EV220B valve?
Which coil should I choose to get a Normally Open (NO) valve?
I would like an 018Zxxxx coil but could not find it in the catalogue?
Can I download product approvals & certificate from the Danfoss websites?
Answer: Yes, in our internet product catalogue, all product approvals & certificates are listed. If you are unable to local a specific document, please e-mail or call us.
I think my valve coil has short circuited, caused by water. Can I order an O-ring to place under the coil?
Answer: The coil can break down if water enters, because of a missing O-ring between the coil and the valve body. Extra o-rings (10 pcs., ordering no. 018F0094) are available.
Please note that all solenoid valves are supplied with O-rings, not the coils.
The code no on my coil says 018F6176 I can not find this code no. in your catalogue/price list
Which media can Danfoss products be used with?
Answer: The answer depends on the materials in contact with medium for the particular product. This information can be found in the technical brochure / data sheet for the product.
We have products designed specifically to handle particular media, including drinking water, oil, air, petrol, steam and more. If in doubt, please contact your nearest Danfoss office.