I have a spring loaded adjustable differential poppet valve that is too small, and the vendor does not make a larger one. It is a special configuration that places the poppet port at the outlet barrel tip. The valve body has an extended barrel to extend the port down to the bottom of the threaded mount to match up with the inner wall of a cavity. I need a redesign to maintain the functionality of the valve while enlarging the orifice to pass 50% greater flow. Pushing the flow rate causes erosion. Referrals to firms capable of the redesign would be appreciated.The problem exists with the larger flow, regardless of material. I do not know whether to consider it oxidizing or reducing. The pH is 3 (carboxylic acid), trace water, trace NaCl, ppm level of HCl, trace phenol. Damage was been far worse with the Hast C & B (lasted 1 wk) than INCONEL 718 (lasts 2-3 mo). This is an injector quill, but isn't the functionality of the spring and area the same as a differential poppet, just configured to have the sealing point at the tip? If not, please point out what other functional differences there are.

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