Want to buy SAFETY SPRING VALVES (Quantity: 2)

RFQ Details

Dear Messrs Trade Key :
My name is Alex Cruz from a company that work with diaphragms pumps AODD , Importcruz.
Now we need Two Units of “Security Submergible Valves” ø 3” for 400 PSI or 500 PSI .

The valve must had been tested for 195 to 210 PSI . (when the level is 195 to 210 PSI the valve Stars…)
THE PROBLEM I HAD WITH THE ONE IN THE PHOTOGRAF WAS THAT THE VALVE JUMPED AT 98 PSI, NOT AT 195 PSI . AND THE LEVEL IN WHICH THE VALVE SHOULD JUMP IS IN 195 PSI, AND WE BOUGHT THIS VALVED TESTED FROM 195 TO 210 PSI
I'll send the photograph, it has a long and big spring.

If you do not have an item for this application;; Can you advise us the model (or the brand) of valve we can apply in this work?
Than you and Best regards
Alex Cruz