English

English

Get a Quote
Industry Knowledge
Case Review: DERVOS DN3750 BUTTERFLY VALVE FOR INDIAN GOVERNMENT PROJECT
2020-12-24

The biggest valve Dervos has made ever.


This is a DN3750 butterfly valve Dervos made forBombay Municipal Corporation in 2017 which is a government project.


The project is special and challenging for its operation for suchalarge size of DN3750.


As its torque isup to 989954N.m,it isbetter to be automatically actuated instead of manual operation. But as where it was going to serve is outreach of electrical power, manual operation is the only choice we have.


After accurate calculation of the torque, finally we came up with a solution that DN3750 would be operated by a combination of total four gearboxes,which reduced theinput torqueinto incredible117N.m.


What an amazing job we did!


Andfor this valve, many tests had been carried out, including but not limited to below:


We had done DP to the seat ring, UT to flanges, disc and stem, and RT to the welding. Besides, we had done strength tests to disc, adhesive tests to the painting, and IP68 Submergence Test by merging the gearboxes into 3-metre deep water by 72hours. And movement tests were also witnessed, it took about 9 hours from fully open to fully close position.


Eventually,The completed valve was made out as about 58 tons weight and 82.4 CBM.


Besides the remarkable work we did, we're so proud that its successful put-in-use was even reported by the local newspaper in Mumbai.


As you can conclude, Dervos is indeed a professional and reliable valve provider. Contact us today, and get you the quality products and outstanding services Dervos offers.

Leave a message

    If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

Home

Products

about

contact