Danfoss EVSI 15, EVSI 20, EVSI 25, EVSI 32, EVSI 40 and EVSI 50 range replaced by the EV220B series basically a European code number change only! EV220B (EVSI) Series solenoid valves are two-way, two position valves for clean-water or low-pressure-steam applications. They are available normally closed or normally open. EV220B (EVSI) Series valves are pilot-operated and designed for non-water hammer operation.

Danfoss EV220B water hammer damped solenoid valve
In general it is the closing speed of the valve that determines the water hammer phenomenon. In reality the water hammer comes just before the valves closes. By controlling the closing speed at this stage the water hammer can be reduced. On the Danfoss EV220B valve it is done by having an optimized shape of the moulded diaphragm, a reinforcement giving an internal damping and a special damping cone giving a viscous damping in the very late closing stage. In addition the closing speed can be adjusted by changing the equalising orifice.

Insensitive to dirt
The flow through the dirt sensitive pilot system is filtered on the EV220B. The filter is a self-cleaning type and is placed as a coaxial filter in the main valve flow. If the equalising orifice is blocked by build-up of dirt, it can easily be removed and cleaned with compressed air.

Broad range of different body and sealing materials
The EV220B 15-50 range is available in three different body materials and with three different seal materials. It makes it possible to use the standard brass version for common applications with limited risk of corrosion, and as trouble-shooter the EV220 B SS version with FKM and optionally with an isolating diaphragm. This version is called EV222B and can be used in contaminated media that risk corrosion.

Temperature range from brine to steam
The EV220B 15-50 can be used for hot water and steam up to 140°C. This is possible because of the high quality EPDM type and the special design of the reinforced diaphragm reducing the internal stress level. During the movement of the diaphragm the rubber is stressed and relieved several times and often determines the lifetime of the valve. The seal material determines the minimum temperature. The high quality EPDM type is still soft at -30°C. This makes it possible to use the EV220B 15-50 for' several brines. In case of aggressive steam, DZR or even Stainless Steel valve material can be chosen.

Wide coil range up to IP67:
The EV220B range uses the standard B-range of coils from IP00 to IP67. This makes it possible to choose the optimal coils no matter if the 'solution be technical or economical. If the valve is placed in a dry, protected position with a limited temperature a low wattage coil with IP20 will be the most cost effective solution, but if the coil is placed in a position with risk of water splashing and temperatures up to 80°, the more powerful and robust Clip-on coils will be best.

Broad range of standard options
E220B 15-50 is a range in a modular program. Accessories such as isolating diaphragm unit, NO-unit, manual-operating unit and adjustable equalising orifice are easily fitted on the valve, and the usual wide coil range can be used.

High capacity in the entire pressure range
At low differential pressures an additional closing force is needed to get a proper tightness. This is done by the closing spring. Due to the increased thickness on the sealing point of the diaphragm of the EV220B valve only a very low closing force is needed from the spring. If this spring is very soft only a low differential pressure is needed to lift the diaphragm resulting in a high opening degree. This means you don't need an assisted lift solenoid valve as in most of the cases. On the EV220B 15-50 there are no compromises on the capacity of the valve. The valve is designed with very smooth internal shape of the valve body. Also the use of a special design of the diaphragm to increase its lift height increases the capacity.

Good external tightness even at high differential pressures
The pressure in the valve tries to increase the gap between valve cover and valve body. To avoid leakage because of the gap the moulded diaphragm has a built-in a-Ring giving an excellent sealing between valve cover and valve body even at high pressures. This results in a very good external tightness.

• 2/2-way
• Servo-operated
• DN 15 - DN 50
• Valve body available in brass, DZR brass, gun metal or stainless steel
• NC and NO versions
• ISO 228/1 or NPT thread connection (EVSI and EVSI-U)
• Built in filter for protection of pilot system
• Water hammer damped
• Adjustable closing time available
• WRAS approved versions

Danfoss EV220B (15-50) Servo-operated 2/2-way solenoid valves complete with coils

The Danfoss solenoid valve program includes valves suitable for most open and closed systems. The program comes complete with the clip-on coil and IP65 electrical plug and has been carefully designed to simplify product selection. Appendix “02” for 24 V dc, “16”/”82” for 24 V ac and “31” / “84” for 230 V ac



To select the right valve all that is required to be known is:
• Open or closed pipe work system
• Pipe size
• Electrical voltage

 

Approvals

CARSO-SO - Laboratoire Santé Environnement Hygiène de Lyon  Solenoid valve, EV 270B
CARSO-SO - Laboratoire Santé Environnement Hygiène de Lyon  Solenoid valve, EV 210B 
CSA-Canadian Standards Association  Solenoid valve, EVI 1.5U;EVI 2U;EVI 3U;EVI 6;EVI 10
DEMKO-KO - UL International Demko A/S  Solenoid valve, EVSI
DNV-Det Norske Veritas  Solenoid valve, EV220B 6B;EV220B 10B;EV220B 12B;EV220B 15B;EV220B 20B;EV220B 25B;EV220B 32B;EV220B 40B;EV220B 50B
DNV-Det Norske Veritas  Solenoid valve, EV210B 1.5B;EV210B 2B;EV210B 3B;EV210B 6B;EV210B 10B
GOST-T - Russian Government Standardization  Solenoid valve, EV
PZH-National Institute of Hygiene  Solenoid valve, EV 250B
RMRS-S - Russian Maritime Register of Shipping  Solenoid valve, EV210B 1.5B;EV210B 3B
RMRS-S - Russian Maritime Register of Shipping  Solenoid valve, EV220B 6B-50B
UL-Underwriters Laboratories inc.  Solenoid valve, EV
WRAS-S - Water Regulations Advisory Scheme  Solenoid valve, EV220B 15SS;EV220B 20SS;EV220B 25SS;EV220B 32SS;EV220B 40SS;EV220B 50SS
WRAS-S - Water Regulations Advisory Scheme  Solenoid valve, EV220B 15BD;EV220B 20BD;EV220B 25BD;EV220B 32BD;EV220B 40BD;EV220B 50G
WRAS-S - Water Regulations Advisory Scheme  Solenoid valve, EV220B 15B;EV220B 20B;EV220B 25B;EV220B 32B;EV220B 40B;EV220B 50G
WRAS-S - Water Regulations Advisory Scheme  Solenoid valve, EV220B 15SS;EV220B 20SS;EV220B 25SS;EV220B 32SS;EV220B 40SS;EV220B 50SS

Spare parts kits for EV220B