What happened to the code numbers for the WRc approved valves?
What is the difference between direct- and servo-operated solenoid valves?
Antwort Physical differences:
Direct-operated valves have an armature that controls the fluid.
Servo-operated valves have an armature that controls the pilot system that controls a diaphragm or a piston.
Differential pressure differences:
Servo-operated valves require a minimum differential pressure to keep the valve open, whilst direct-operated valves do not require a minimum differential pressure to operate.
Which media are your solenoid valves suited for?
Antwort Danfoss manufactures valves in many different body and seal materials to suit most media. We have valves specifically engineered for media from drinking water and air to steam, petrol and oil types.
If you are unsure on suitability of the valve with the medium in question, please download our technical brochures or contact your local Danfoss company.
I need a spare part for my product. Do you have that?
If my system has back pressure, should I take any precautions?
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)?
Antwort 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?
Antwort Som code numbers are not available for all markets, or it may have been replaced by another number.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/
I need a solenoid valve for a machine for use in North America, do you have some?
I am looking for a Danfoss product, type USC6000, but cannot find it in your catalogues?
Could I send you a Danfoss part for repair?
Do you have a device that cools a heating system on rising temperature?
Which valve should I use for pressure relief function in an open system with high pressure?
Are the code numbers of the EV220B solenoid valves the same as the previous EVSI valves?
I have bought the valve AV210, can you offer me the pilot valve to do the control?
Can I use the EV220B with chlorine?
Which solenoid valve should I choose, if am not sure about the differential pressure of the application?
Antwort If you are not completely sure about the differential pressure, you should choose the EV250B valve, because this valve works from 0 differential pressure. Alternatively, for low pressure and small dimensions, we recommend the direct-operated valve EV210B.
I am unsure about the pressure conditions in the installation, and I need a solenoid valve, size 1” - which should I choose?
I have installed an pneumatically operated valve type HP210 and it does not work any longer. Can you offer me a new one?
Can I buy Concordia valves?
I am looking for a pump, type APP?
How do I remedy reduced functionality of an AVTA after placing the sensor in a immersion pocket?
Antwort To ensure thermal conductivity between the sensor and the immersion pocket wall, it is recommended to use heat-conductive compound, available as an accessory under the code number 041E0110 (5 g) or 041E0111 (800 g).
Do you have solenoid valves for air compressors?
Is it possible to use AVTA for protecting bio-mass boilers?
Antwort Yes, AVTA is a great solution for biomass boilers above 100 kW, preventing overheating of the boiler. In case of smaller boilers, we recommend the purpose-designed bio-mass valve BVTS.
I am looking for Danfoss MASSFLO and MAGFLO flow meters?
I am looking for a Danfoss butterfly valve?
Can I use the EV220B solenoid valves for steam applications?
What does it mean that thermostatic valves are proportional and self-acting?
Antwort Proportional means that on sensor temperature change, the cooling water flow quantity change is proportional. This correlation is kept up to 85% of valve capacity. Self-acting means that thermostatic valves operate without the supply of external auxiliary energy such as electricity or compressed air. It is a very important advantage of thermostatic valves because even at breakdowns in the power supply, the valve will still function, e.g. keep cooling the application.
I would like to order a solenoid valve with the stamped no. 446U5252 and can not find it in your system?
Is it possible to replace a copper capillary tube with a stainless steel version?
Antwort No, unfortunately elements with stainless steel capillary tube are not available, but we recommend using a thermostatic element with stainless steel armour, protecting the capillary tube's entire length.
Does an AVTA valve contain any hazardous parts or substances?
Is it necessary to dismantle AVTA valve from the application to replace the thermostatic element?
Can an AVTA valve be used with glycolic water?
Can I use an AVTA thermostatic valve to regulate air temperature?
Can you deliver your products wordwide?
Antwort 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?
Antwort 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?
Antwort 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?
Antwort 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 avaliable items.
What is differential pressure?
What is water hammer?
I need an EV220B 1/2" for an open water system. Which one should I choose?
Can high differential pressure across an AVTA valve influence its functionality?
What does servo-operated mean? Has it to do with servo control?
Can I mount an EV220B valve upside down?
I have mounted an EV220B valve in the warm water circuit of a heating system. The valve does not open. Is it defect?
Antwort Under the circumstances that there is no dirt or limestone in the system, it is likely that the differential pressure is too low to operate the valve. In a closed system we recommend using a valve which doesn't require a differential pressure. If you use an assisted lift operated valve type EV250B, capable of operating from 0 bar differential pressure, your valve will work correctly.
Is it possible to use the Danfoss solenoid valves on natural gas installations?
I have ordered an EV220B valve NO, but if I blow through the valve, it is closed. Have I got a NC valve?
Antwort Like an NC diaphragm valve, an NO valve requires a minimum differential pressure of about 0.3 bar to open. Therefore you cannot open the valve just by blowing, and so it can be difficult to decide if a valve is NC or NO just by blowing.
How can I see if my solenoid valve is NC or NO?
Can I order only the upper part of a valve housing as a spare part?
Where do I direct commercial or technical questions?
What are the difference between direct-, servo- and assisted lift operated valves?
Antwort On a direct-operated valve the armature opens the main orifice of the valve. On a servo-operated valve the armature opens a small pilot valve that reliefs the pressure and the volume above the diaphragm, so that the differential pressure can lift the diaphragm and opens the valve. The assisted lift operated valve operates similar to the servo-operated valve, however the armature is connected to the diaphragm and will lift it to open the valve even if there is no differential pressure.
Why does Danfoss not offer EV250B valves in bigger sizes than 1"?
Why is an EV220B solenoid valve more expensive than an EV220A valve?
Do you have local stock?
Why is the sensor mounting position so important for AVTA with universal charge?
Where can we find your data sheets?
Antwort 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?
Can you give me some key figures on danfoss?
Antwort If you are looking for number of employees, sales companies, turnover etc., you will find updated information here:
http://www.danfoss.com/AboutUs/FactsAndFigures/
Does Danfoss operate globally?
Is Danfoss a German company?
I am looking for a hydraulic oil pump?
Can we offer a valve according to EN161?
What type of seal material is appropiate for glycol ?
Can I use the EPDM seal material for air?
Antwort Yes, it is possible, but only when you are sure that the air is free of oil and grease.
Most air compressors are lubricated with grease, which will mix up with the compressed air. In this case, you should use a valve with NBR or FKM (viton) seal material.
How can I control air for pneumatically operated valves?
What pressure is required to control AV210 ?
Can I use the AV210 for waste water ?
Antwort Yes, the AV210 has a resistant floating disk that gives a secure sealing on the orifice.
This is also benefitial when using steam. Steam can be aggresive and contains impurities, and this valve is good for steam and trouble shooting in general.
Can I use an AVTA valve for heating purposes ?
Antwort AVTA is designed for cooling systems in industrial applications. However if you remove the 8 screws that fix the valve body and assemble in the reverse position, you will be able to use the valve for heating purposes, always respecting the temperature that the bulb is specified for.
For heating systems, we recommend the Danfoss valve AVTB, designed for this application and obtainable through the Danfoss Heating Division.
The solenoid valve EV250B is leaking. What should I do?
Antwort First of all you need to determine whether the the leaking is internal or external.
Internal leak: Normally comes from dirt or deposits on the orifice. In this case you should disassemble the valve, clean it to secure that there is no dirt particles blocking between the orifice and the diaphragm, avoiding the valve to close.
External leak: You should check the following:
1) Seal material not appropriate for the medium
2) Temperature too low or too high
3) Pressure too high
Is it possible to order a normally open (NO) version of the solenoid valve EV220B 65-100 Cl?
How can I replace 032U7328?
Antwort 032U7328 was the solenoid valve body for EV220B 50 in gun metal. Now the body is made in brass or DZR brass.
If you want to replace this valve or buy a spare part set it is important to know what the original seal and NO/NC function was.
Original solenoid valve code nos. could be 032U7150, -7175, -7151, -7152, -7185, -7153 or -5850.
I assemble air suspension system for cars, does Danfoss have any solenoid valve for this kind of application?
I have a Danfoss solenoid valve in NO (normally open) version. Is it possible to change this valve to a NC (normally closed) version?
Antwort No, unfortunately.
Since an NO unit is normally one actuator unit that can not be separated and since we are not supplying our NC spare kits including armature tube, the only possible "conversion" will be to buy a new NC valve.
A conversion from NC to NO is often possible using NO kits.
What is the difference between the AVTA and AVTB ?
Antwort The AVTA valve opens at rising temperature (cooling application).
The AVTB, available from Danfoss Heating Division, is the opposite of the AVTA, and is used for heating applications, so it opens when temperature is falling.
What is the difference between the EV220B and EV250B valves?
Antwort Valves type EV220B (servo-operated) are mainly used for open systems, where the differential pressure is higher than a certain value.
An EV250B (assisted lift operated) can be used for both open and closed systems, but is mainly used in closed systems where the pressure conditions are low or uncertain. If you are not sure what the exact differential pressure will be, choose the EV250B.
My AVTA valve's sensor with universal charge is only half immersed in the medium. How does this influence the valve's functionality?
I am looking for a gas valve for Argon application for a closed system, which valve could I use?
What is off-set for thermostatic valves?
What is hysteresis of an AVTA valve?
What is the AVTA valve's reaction time on temperature changes?
Antwort Reaction time depends on two factors: Type of the charge and whether sensor is in contact with liquid media or air.
Examples of reaction time for AVTA with mass/universal charge:
3-4 seconds - sensor in water, at increasing temperature, middle range.
216 seconds - sensor in air 0.5 m/s, at increasing temperature, middle range.
156 seconds - sensor in air 1.0 m/s at increasing temperature, middle range.
For adsorption charge reaction time is longer than for other two fillings.
Which AVTA valve should I use when the ambient air has H2S, destroying the capillary tube?
What is the compatibility of AVTA body with deionized water, corrosive for metals?
Antwort Deionized water is an aggressive medium and can have bad influence on brass housing of the valve.
DI water can destroy brass material, extract metals (zinc) from brass and pollute water. Very high grade DI water will erode brass fast (around 6 months) and low quality DI will give a slow gradual attack on the brass.
We recommend using a stainless steel version of the AVTA valve.
Is there any temperature range preset made for the WVTS valve?
Can you send me a 3.1 certificate for a valve already delivered?
Antwort The inspection certificate 3.1 involves test results that shall be carried out during production process for the specific valve. For valves already produced, we are therefore not able to issue this certificate.
Therefore, when ordering, please specify the need for the certificate.
Permissible working pressure for the WVTS valve is 10 bar. What will happen if WVTS will be installed in application where pressure is maximum 16 bar?
Antwort If the pressure is higher than the allowed, it is likely that the permanent influence shortens the life period of the internal parts of the WVTS valve.
In such cases, we recommend using 2 AVTA valves in parallel connection instead of one WVTS. The AVTA can operate at 16 bar and thus be used without problems.
How do I see the production date of an AVTA valve?
The pilot unit for WVTS valve is supplied with white plastic washer - is it only packaging protection to be thrown out?
Is it necessary to install a filter ahead of thermostatic valves?
Antwort We always recommend installing a filter type FV in the pipe system ahead of valves, especially in cases when the medium could be contaminated or include dirt particles. A dirt filter should be always installed ahead of the FJVA valve, which has a small-diameter bypass in the valve body.
Are AVTA, FJVA and WVTS valves UL or CSA approved?
My WVTS 80 valve has 8 holes for flange connections, but the technical brochure shows only 4. Is the product wrong?
For thermostaticall operated valves, are there any requirements to the cooling water temperature?
Antwort The only requirement is that the cooling water temperature should be less or equal to the setting temperature.
If the cooling water temperature is close to that point, then more capacity is necessary to cool down the process medium.
We may in this case recommend a bigger valve size than in cases when the cooling water temperature is lower.
How to select proper size of the valve depending on cooling water temperature is shown in the data sheet.
My AVTA valves is noisy - why?
How does AVTA react to cooling oil as a medium?
Antwort We recommend using NBR diaphragms for oil as cooling medium. NBR diaphragms are available as accessory 003N0445, 003N0446, 003N0447 (see the technical brochure or our Internet product catalogue).
Can AVTA be used for a mixture of alcohol and water?
Antwort As we do not know exact type and composition of alcohol, we suggest forwarding above information to manufacturer of the mixture, who can assure proper functionality with NBR and EPDM seal materials.
Is it possible to order a WVTS valve with other charge than universal?
Are thermostatic valves AVTA, FJVA, WVTS normally closed or normally open valves?
The maximum sensor temperature of AVTA (Regulation range 0-30°C) is 57°C. Can the minimum sensor temperature be down to -40°C?
Why is our delivery delayed, when I saw that the delivery date is confirmed for 2 weeks in e-commerce?
Where can I get the technical brochure for AVTA valves?
How do I select the right size AVTA valve?
Antwort First you must know the flow rate of water required, the regulation temperature at the sensor, and the allowable pressure differential across the valve.
With this information refer to the AVTA technical brochure for instructions and tables which will help you select the correct valve. If you do not know the water flow rate required, there is a table which will help you determine it, but you will need to know the required capacity of heat removal in refrigeration tons (TR) or in KW.
Are Danfoss AVTA valves UL listed?
What is difference between AVTA and FJVA valves?
Can the sensor element of AVTA valves be installed in any orientation?
Can an AVTA valve be installed in any orientation?
How do I set temperature on AVTA valve?
Where can I find some technical information about your products?
Can I buy a pilot filter separately for flange solenoid valves EV220B 65-100 CI?
Is it possible to install an EV220B (15-50 series) on vertical pipes?
Which solenoid valve should I choose for Glycol as a medium?
I have an EV220B 25B that does not close properly - should I unscrew the equalising orifice to close it?
Antwort First of all you need to find out what the medium is.
Hard water could cause some trouble with valve closing, if the equalizing orifice is blocked. You have to check the differential pressure which should be at 0.3 bar min.
The equalising orifice could be changed if necessary; have a look on the technical brochure available on our internet site.
Spare part kits with diaphragm and O-ring and gaskets are also available.
Can I get an AVTA with ATEX approval?
What do I need to know to select the right product?
Are the solenoid valve Kv values valid for compressed air?
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 solenoid valve should I choose for showers?
I work with steam and the Danfoss solenoid valve EV225B does not have enough flow. Can you recommend another option?
How do I adjust the temperature on an AVTA valve?
Antwort You have to use the setting knob on the upper side of the valve. Position 1 is the minimum temperature of the specific range position, and 5 is the highest.
If you need a very accurate figure, you should check the temperature setting with a thermometer.
Do you have a solenoid valve for air, 24 V dc and 1/4" thread on both sides?
Can I get Danfoss solenoid valves suitable for seawater?
Antwort Yes, however the amount of salt in seawater, oxygen concentration and temperature of the water all determine how the medium influences the different solenoid valve materials.
The best option is an EV220B in stainless steel, or the EV222B, featuring an isolating diaphragm.
Can I download product approvals & certificate from the Danfoss websites?
Antwort 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.
What does "solenoid" mean?
Antwort A solenoid is a three-dimensional coil. In physics, the term solenoid refers to a loop of wire, often wrapped around a metallic core, which produces a magnetic field when an electric current passes through it.
Can I order just the capillary tube for an AVTA?
In a open water system, I have an EV210 valve which does not open - what can be wrong?
Antwort Most likely the system pressure is too high. The EV210B operates from 0 to a limited differential pressure, especially on bigger valve sizes. If this is the case, we recommend a more powerful coil or a valve type EV220B or EV250B.
Are your valves certificied for use with water?
Antwort All our EV210A, EV210B, EV220A, EV220B, EV250B are certified by WRAS. Some of the EV220B valve also have the French approval ATTESTATION DE CONFORMITE SANITAIRE, ACS and the Polish approval PANSTWOWY ZAKLAD HIGIENY, PZH.
All these valves have seal material in EPDM.
Could the AV210 capacity control be used together with the AV210 position indicator?
Which media can Danfoss products be used with?
Antwort 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.