i checked resistance of an solenoid valve coil with multimeter and it shows OPEN connection so i presumed that valve is damaged. but when i connect the supply (110 VAC)to it, i found the the coil still energizes.

if any one is able to figure out the reason

thanks in advance

 

Bans,
It sounds as though there is some solid state device connected in the circuit. e.g. is it rectified or has some sort of economy device typical of a large DC coil where the holding current is only a fraction of the initial closing current. The voltage of your multimeter may be reverse biased or too low to overcome the forward bias. Another possibility is a faulty connection but I think the former is more likely If you post the make & part No I'm sure someone can figure it out.

Roy

 

Is the coil rated for AC?

What constitutes an 'open circuit'? A measurement with an analog VOM meter on 10 ohm scale and the needle pegs out?

I know some current solenoid valves have 'electronics' embedded with the coils.

Page 3 of ASCO's white paper at
http://www.ascovalve.com/common/pdffiles/product/engineering.pdf
shows a cap in parallel with a resistor, both of which are in series with the coil. However, it is described as a 'simple circuit', not necessarily that which is used in practice.