Exhibit 23.1 Consent of Independent Accountants We hereby consent to the incorporation by reference in the Prospectus constituting part of the Registration Statement on Form S-3 (No. 33-57100) and in the Registration Statements on Form S-8 (No. 33-40397 and No. 33-44776) of Flow International Corporation of our report dated June 3, 1997 included in this Form 10-K. /s/ Price Waterhouse LLP Price Waterhouse LLP Seattle, Washington July 28, 1997