can someone help me in finding the dynamic equation of transient state of opening of a butterfly valve.

e.g.

in no load condition the valve opens in "x" sec. but load applied how the time of opening of the valve will vary?

A quick help will be highly appriciated.

Thanks in advance.

Best!

C.K.

Dear Sir/Madam,

We are a electronic-tech company specialized in electronic meter and other electronic products for pressure,temperature,flow,valve, dealing and trading in China. We have been in this area for more than 20 years and we have a large customer network in this area in China. Currently we are looking for exclusive agent role in China area for selling your products for pressure,temperature,flow,valve, if your company could provide this opportunity, please kindly contact us ASAP.

B. r.

Linda Sun Manager Director Sales Dept, Baidi Electronic