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Dear All, which is the formula to calculate the required volume of pulsation dampener (bladder type) for diaprhagm pumps? Thanks in advance for your support

@ DubMac you're absolutely right and I agree with you. For your info I work in Italy and the most of suppliers are Italian, I have noted that the other suppliers (like american, english) are more precise. @ hitchhiker The only way it's to arrange a pre-bid meeting, but many times it's...

Hello guys, in my little experience, I can confirm that in the bid stage it's difficult to have all the information from suppliers, since they are not confident to take the Purchase Order, while after P.O. they give all the information requested. I noted that they usually limit themselves to...

Hi guys, there is a misunderstanding. I usually submit to the supplier the following documents: - the supply specification with the attachements, including the API data sheet filled in, painting spec's, etc. - the material requisition The problem is that the most of pump suppliers don't give...

Hi everybody, please see here attacched a copy of tecnical bid evaluation that I usually submit with RFQ to vendors for purchasing of screw pump. I'm trying to get the same for reciprocating pump. What do you think about my way of working? Thanks in advance for your cooperation Regards...

Hi Micalbrch, thank you very much for sending the API 674 data sheet. It's the first time that I have to prepare the RFQ for purchasing of Reciprocating Pumps. I'll begin to fill in the pump data sheet. In any case, what are the main parameters to be consider in order to assess properly the...

Hello everybody, I have very little experience in technical bid evaluation for reciprocating pumps. I tried to arrange a tabulation sheet based on the requirements of API 674, but it's very difficult since there are a lot of parameters to be consider. Based on your experience, could you help...

thank you very much for quickly reply.

Hello everybody, I have a question regarding the ATEX Certification of pump with the following characteristic: Pump type: Centrifugal Pump Pumped Liquid: Cooling Water Pumped Liquid Temperature: +15 °C Mechanical Seal Type: Single Mechanical Seal Electrical Area Classification: Zone 2, Group...