<PAGE>

                                     FORM 10-Q/A

                          SECURITIES AND EXCHANGE COMMISSION
                                WASHINGTON D.C. 20549

(X) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended July 31, 1997

                                          OR

(  ) TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _________ to _________

Commission file number 0-12448

                            FLOW INTERNATIONAL CORPORATION

               DELAWARE                                91-1104842
               (State or other jurisdiction            (I.R.S. Employer
               of incorporation or organization)       Identification No.)

                              23500 - 64TH AVENUE SOUTH
                                KENT, WASHINGTON 98032
                                    (206) 850-3500



Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.  Yes  X    No
                                        ---      ---

The number of shares outstanding of common stock, as of September 30, 1997:
14,840,672 shares


<PAGE>

                            FLOW INTERNATIONAL CORPORATION
                                        INDEX


                                                                            Page
                                                                            ----
Part I - FINANCIAL INFORMATION

 Item 1.  Condensed Consolidated Financial Statements

    Condensed Consolidated Balance Sheets -
     July 31, 1997 (as restated) and April 30, 1997. . . . . . . . . . . . . 3

    Condensed Consolidated Statements of Operations -
     Three Months Ended July 31, 1997 (as restated) and July 31, 1996. . . . 4

    Condensed Consolidated Statements of Cash Flows -
     Three Months Ended July 31, 1997 (as restated) and July 31, 1996. . . . 5

    Notes to Condensed Consolidated Financial Statements (as restated) . . . 6

 Item 2.  Management's Discussion and Analysis of
     Financial Condition and Results of Operations (as restated).. . . . . . 8

Part II - OTHER INFORMATION

 Item 1.  Legal Proceedings. . . . . . . . . . . . . . . . . . . . . . . . . 11

 Item 2.  Changes in Securities. . . . . . . . . . . . . . . . . . . . . . . 11

 Item 3.  Defaults Upon Senior Securities. . . . . . . . . . . . . . . . . . 11

 Item 4.  Submission of Matters to a Vote
           of Security Holders . . . . . . . . . . . . . . . . . . . . . . . 11

 Item 5.  Other Information. . . . . . . . . . . . . . . . . . . . . . . . . 11

 Item 6.  Exhibits and Reports on Form 8-K . . . . . . . . . . . . . . . . . 11

Signatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12


                                          2
<PAGE>

                            FLOW INTERNATIONAL CORPORATION
                        CONDENSED CONSOLIDATED BALANCE SHEETS
                   (unaudited, in thousands, except share amounts)


<TABLE>
<CAPTION>
                                                                   July 31,          April 30,
                                                                     1997               1997
                                                                   --------           --------
                                                                 (as restated)
<S>                                                                <C>                <C>


           ASSETS
Current Assets:
  Cash                                                             $  7,824           $  2,479
  Trade Accounts Receivable, less allowances
    for doubtful accounts of $953 and $1,008, respectively           42,940             40,050
  Inventories                                                        41,882             38,471
  Deferred Income Taxes                                               4,758              4,758
  Other Current Assets                                                4,338              4,959
                                                                   --------           --------
Total Current Assets                                                101,742             90,717
Property and Equipment, net                                          27,774             25,594
Intangible Assets, net of accumulated
  amortization of $4,682 and $4,441, respectively                    14,033             11,471
Deferred Income Taxes                                                   515                515
Other Assets                                                          3,091              5,169
                                                                   --------           --------
                                                                   $147,155           $133,466
                                                                   --------           --------
                                                                   --------           --------

  LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:
  Notes Payable                                                    $  1,843           $  1,651
  Current Portion of Long-Term Obligations                            2,985                 79
  Accounts Payable                                                   12,027             11,619
  Accrued Payroll and Related Liabilities                             4,324              4,564
  Other Accrued Taxes                                                   985              1,139
  Other Accrued Liabilities                                           9,307              3,539
                                                                   --------           --------
Total Current Liabilities                                            31,471             22,591
Long-Term Obligations                                                61,640             53,569
Minority Interest                                                       518                553

Shareholders' Equity:
  Series A 8% Convertible Preferred Stock -
    $.01 par value, $500 liquidation preference, 1,000,000 shares
    authorized, 0 issued
  Common Stock - $.01 par value, 20,000,000 shares authorized
    15,091,611 and 14,710,794 shares issued and outstanding,
    respectively, at July 31, 1997
    14,925,627 and 14,544,810 shares issued and outstanding,
    respectively, at April 30, 1997                                     151                149
  Capital in Excess of Par                                           39,012             38,871
  Retained Earnings                                                  18,317             19,266
  Treasury Common Stock of  380,817 shares at cost                   (1,429)            (1,429)
  Cumulative Translation Adjustment                                  (2,184)               101
  Unrealized Loss on Equity Securities Available For Sale              (341)              (205)
                                                                   --------           --------
Total Stockholders' Equity                                           53,526             56,753
                                                                   --------           --------
                                                                   $147,155           $133,466
                                                                   --------           --------
                                                                   --------           --------

</TABLE>


                         See Accompanying Notes to Condensed
                          Consolidated Financial Statements


                                          3
<PAGE>

                            FLOW INTERNATIONAL CORPORATION
                   CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                   (unaudited, in thousands, except per share data)


<TABLE>
<CAPTION>

                                                                  Three Months Ended
                                                                        July 31,
                                                             -----------------------------
                                                                  1997             1996
                                                             (as restated)
<S>                                                           <C>                <C>
Revenue:
  Sales                                                       $ 37,446           $ 32,353
  Services                                                       6,423              5,236
  Rentals                                                        3,645              3,340
                                                              --------           --------
    Total Revenues                                              47,514             40,929

Cost of Sales:
  Sales                                                         22,468             19,244
  Services                                                       5,887              3,808
  Rentals                                                        1,099              1,604
                                                              --------           --------
    Total Cost of Sales                                         29,454             24,656
                                                              --------           --------

Gross Profit                                                    18,060             16,273

Expenses:
  Marketing                                                      6,895              6,232
  Research and Engineering                                       2,500              2,167
  General and Administrative                                     4,160              4,102
  Restructuring (Note 1)                                         4,910                  -
                                                              --------           --------
                                                                18,465             12,501
                                                              --------           --------

Operating Income (Loss)                                           (405)             3,772

Interest and Other Expense, net                                 (1,055)              (629)
                                                              --------           --------

Income (Loss) Before Provision for Income Taxes                 (1,460)             3,143

Provision (Benefit) for Income Taxes                              (511)               911
                                                              --------           --------

Net Income (Loss)                                             $   (949)          $  2,232
                                                              --------           --------
                                                              --------           --------

Earnings (Loss) Per Common and Equivalent Shares              $   (.06)          $    .15
                                                              --------           --------
                                                              --------           --------

</TABLE>


                         See Accompanying Notes to Condensed
                          Consolidated Financial Statements


                                          4
<PAGE>

                            FLOW INTERNATIONAL CORPORATION
                   CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                              (unaudited, in thousands)

<TABLE>
<CAPTION>
                                                                               Three Months Ended
                                                                                     July 31,
                                                                          -----------------------------
                                                                               1997           1996
                                                                          (as restated)
<S>                                                                       <C>             <C>
Cash Flows from Operating Activities:

  Net Income (Loss)                                                        $   (949)      $   2,232
  Adjustments to Reconcile Net Income to Cash
    Provided (Used) by Operating Activities:
    Depreciation and Amortization                                             1,186           1,949
    Restructuring provision                                                   4,910
    Other                                                                                        23
    Increase in assets                                                       (2,434)         (2,508)
    Increase (decrease) in liabilities, net of effects of restructuring        (244)          1,667
                                                                            -------         -------
  Cash provided by operating activities                                       2,469           3,363
                                                                            -------         -------

Cash Flows from Investing Activities:

  Expenditures for property and equipment                                    (2,922)         (2,023)
  Payment for business combination, net of cash acquired                     (2,528)
  Other                                                                         135             (19)
                                                                            -------         -------
  Cash used by investing activities                                          (5,315)         (2,042)
                                                                            -------         -------

Cash Flows from Financing Activities:

  Borrowings (repayments) under line of credit agreements, net               10,345          (1,785)
  Payments of long-term debt                                                    (12)            (38)
  Proceeds from issuance of common stock                                        143             262
                                                                            -------         -------
  Cash provided (used) by financing activities                               10,476          (1,561)
                                                                            -------         -------

Effect of exchange rate changes                                              (2,285)           (332)
                                                                            -------         -------
Increase (decrease) in cash and cash equivalents                              5,345            (572)
Cash and cash equivalents at beginning of period                              2,479           3,845
                                                                            -------         -------
Cash and cash equivalents at end of period                                  $ 7,824         $ 3,273
                                                                            -------         -------
                                                                            -------         -------

SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
  Fair value of assets acquired                                             $ 4,735
  Cash paid and stock issued for assets acquired                             (2,818)
                                                                            -------
  Liabilities assumed                                                       $ 1,917

</TABLE>


                         See Accompanying Notes to Condensed
                          Consolidated Financial Statements


                                          5
<PAGE>

                            FLOW INTERNATIONAL CORPORATION
                 NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                For the Three Months Ended July 31, 1997, as restated
                                     (unaudited)

1.  On August 25, 1997 Flow International Corporation (the "Company") entered
    into an agreement to sell the assets and certain liabilities of the Access
    and Services businesses.  The sale was completed on September 30, 1997.
    The primary business units included in this transaction are Spider Staging
    Corporation, Power Climber, Inc. and affiliated companies, Rampart
    Waterblast, Inc. and the Flow Services division.  As a result of the terms
    of the Asset Purchase and Sale Agreement, the Company has restated first
    quarter results in accordance with Statement of Financial Accounting
    Standards No. 121 "Accounting for the Impairment of Long-Lived Assets to Be
    Disposed Of".  The Company has restated its results to include a $4.9
    million charge to write down the assets sold to net realizable value as
    well as provide for probable future obligations associated with the sale.
    The charge is included as  a separate component of operating expenses.
    During fiscal 1997, the Company recorded a $9 million restructuring
    provision related to the planned divestiture of the Access and Services
    businesses.

    As restated, the Company had a net loss of $949,000 or six cents per share
    for the quarter as compared to net income of $2.2 million or $.15 per share
    as previously reported.

2.  In the opinion of the management of the Company, the accompanying unaudited
    condensed consolidated financial statements contain all adjustments
    (consisting only of normal recurring accruals) necessary to present fairly
    the financial position, statements of operations, and cash flows for the
    interim periods presented.  These interim financial statements should be
    read in conjunction with the April 30, 1997 consolidated financial
    statements.

3.  Primary earnings per common share is computed by dividing net income
    available to common stockholders by the weighted average number of shares
    outstanding plus the equivalent shares attributable to dilutive stock
    options during each period.

    The weighted average number of shares outstanding, including equivalent
    shares where required, for the three months ended July 31, 1997 and 1996
    were 14,690,000 and 15,025,000, respectively.  Fully diluted earnings per
    share do not differ materially from primary earnings per share.

    Statement of Financial Accounting Standards No. 128 ("FAS 128"), "Earnings
    Per Share" will be adopted at the end of fiscal 1998.  Applying the
    provisions of FAS 128, the proforma basic earnings per share and the
    proforma diluted earnings per share would not differ from the amounts
    reported in the accompanying Consolidated Statements of Operations.

4.  Inventories consist of the following:
    (in thousands)

                                  July 31, 1997  April 30, 1997
                                  -------------  --------------

    Raw Materials and Parts          $25,062        $23,896
    Work in Process                    8,345          5,872
    Finished Goods                     8,475          8,703
                                     -------        -------
                                     $41,882        $38,471


                                          6
<PAGE>

                            FLOW INTERNATIONAL CORPORATION
                 NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                       For the Three Months Ended July 31, 1997
                                     (unaudited)

5.  In May 1997 the Company purchased the stock of Foracon Maschinen Anlagenbau
    ("Foracon") for $2.3 million and 33,655 shares of Flow common stock.  The
    acquisition further increases the Company's strength in the European
    market.  An additional 97,601 shares of Flow common stock will be paid as
    consideration if Foracon achieves certain financial targets.  Foracon
    supplies ultrahigh-pressure and related systems to the German market.


                                          7
<PAGE>

                            FLOW INTERNATIONAL CORPORATION
                       MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                    FINANCIAL CONDITION AND RESULTS OF OPERATIONS

RESULTS OF OPERATIONS FOR THE THREE MONTHS ENDED JULY 31, 1997, AS RESTATED, AND
1996

    Total revenues for the three months ended July 31, 1997 were $47.5 million,
representing an increase of $6.6 million (16%) over the comparable prior year
period.  Total product sales increased $5.1 million (16%) versus the prior year
quarter.  Product sales from the Company's ultrahigh-pressure ("UHP") and
Automation business increased $4.7 million (18%).  Included in this increase was
a 23% increase in system sales and a 12% increase in spare parts sales.  The
current year includes the results of Foracon Maschinen Anlagenbau ("Foracon")
which was acquired in May 1997 to increase the Companys capacity as well as
strengthen the Company's market position in Europe.  Excluding the effect of
Foracon, UHP revenues increased $3.3 million (13%).  This $3.3 million increase
includes the negative effect of the stronger dollar versus the Deutschemark, an
approximate $1 million reduction in revenues in the current year.  All primary
UHP and Automation sales territories experienced revenue gains with North
America, Asia and Europe increasing 11%, 45% and 27%, respectively.  Access
product sales increased $392,000 (6%) as compared to the prior year.  Service
revenues of $6.4 million represent a $1.2 million increase (23%) over last year
and rental revenues increased $305,000 (9%).

    Gross profit as a percentage of revenues (gross margin rate) was 38% for
the quarter as compared to 40% in the prior year.  The gross margin rate on the
core UHP and Automation business remained at 42% for both the current and prior
year quarter.  The change in consolidated gross margin is attributable to the
Services division which experienced higher than anticipated costs on several
projects.  Comparison of gross margin rates is dependent on the mix of revenue
types, which includes sales, services, and rentals; and the mix of spare parts
and systems in sales revenues. Robotic systems typically carry lower gross
margin rates than the Company's pump, spare parts, and access systems
businesses.

    On August 25, 1997 the Company entered into an agreement to sell the assets
and certain liabilities of the Access and Services businesses.  The sale was
completed on September 30, 1997.  The primary business units included in this
transaction are Spider Staging Corporation, Power Climber, Inc. and affiliated
companies, Rampart Waterblast, Inc. and the Flow Services division.  As a result
of the terms of the Asset Purchase and Sale Agreement, the Company has restated
first quarter results to include a $4.9 million charge to write down the assets
sold to net realizable value as well as provide for probable future obligations
associated with the sale.  This charge is included as a separate component of
operating expenses.  During fiscal 1997, the Company recorded a $9 million
restructuring provision related to the planned divestiture of the Access and
Services businesses.


                                          8
<PAGE>

                            FLOW INTERNATIONAL CORPORATION
                       MANAGEMENT'S DISCUSSION AND ANALYSIS OF
              FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

    Exclusive of the restructuring charge as discussed above, operating
expenses were $13.6 million for the quarter ended July 31, 1997 or 29% of
revenues as compared to 31% in the prior year.  This decrease primarily results
from general and administrative expenses which were flat quarter over quarter.

    Interest and other expense, net, of $1.1 million represents an increase of
$426,000 (68%) over the prior year.  Interest expense increased $300,000
reflecting increased borrowings.  The remaining difference relates primarily to
minority interest in net losses of the joint ventures.

    Based upon the expected tax position of the Company for fiscal 1998, taxes
have been provided for at 35% versus 29% in the prior year.  The income tax rate
was lower than the statutory rate in both the current and prior year due
primarily to lower foreign tax rates, benefits from the foreign sales
corporation, and an ongoing review of the Company's FAS 109 valuation allowance.

    The weighted average number of shares outstanding for the quarter decreased
to 14,690,000, as restated, from 15,025,000 in the prior year.  This decrease
relates primarily to exclusion of common stock equivalents as a net loss was
incurred during the current quarter.

    As a result of the above, the Company recorded a net loss of $949,000, or 6
cents per share, as restated, for the three months ended July 31, 1997 as
compared to net income of $2.2 million or $.15 cents per share in the first
quarter of fiscal 1997.

LIQUIDITY AND CAPITAL RESOURCES

    The Company generated $2.5 million in cash from operations during the three
months ended July 31, 1997 as compared to $3.4 million in the prior year.  Total
debt at July 31, 1997 was $66.5 million, up $11.2 million from April 30, 1997,
while cash increased $5.3 million.  The increase in debt was attributable to the
purchase of Foracon, timing of cash receipts and paydown of debt, and the
negative effect of several Services projects.  Subsequent to quarter end the
Company sold it's Access and Services business.  The cash proceeds of $31.7
million will be used to paydown existing debt.  The Company believes that the
available credit facilities and working capital generated by operations, will
provide sufficient resources to meet its operating and capital requirements.
The Company's Credit Agreement and Private Placement require the Company to
comply with certain financial covenants.  As of July 31, 1997, the Company was
in compliance with all such covenants.


                                          9
<PAGE>

                            FLOW INTERNATIONAL CORPORATION
                       MANAGEMENT'S DISCUSSION AND ANALYSIS OF
              FINANCIAL CONDITION AND RESULTS OF OPERATIONS (continued)

    Gross trade receivables at July 31, 1997 increased $2.8 million (7%), from
April 30, 1997.  This is a function of an increase in sales, the acquisition of
Foracon receivables, as well as a shift in the mix towards large system sales.
Days sales in gross accounts receivable can be negatively impacted by the
traditionally  longer payment cycle outside the United States as well as that
longer payment terms are sometimes negotiated on large system orders.  The
Company's management does not believe these timing issues will present a
material adverse impact on the Company's short-term liquidity requirements.

    Inventories at July 31, 1997 increased $3.4 million (9%), from April 30,
1997.  This increase is in large part work in process and represents products
manufactured by Flow Robotics and Flow Automation which can require an extended
manufacturing period, as well as the acquisition of Foracon inventory.



SAFE HARBOR STATEMENT:

STATEMENTS IN THIS REPORT THAT ARE NOT STRICTLY HISTORICAL ARE "FORWARD-LOOKING"
STATEMENTS WHICH SHOULD BE CONSIDERED AS SUBJECT TO THE MANY UNCERTAINTIES THAT
EXIST IN THE COMPANY'S OPERATIONS AND BUSINESS ENVIRONMENT.  THESE
UNCERTAINTIES, WHICH INCLUDE ECONOMIC AND CURRENCY CONDITIONS, MARKET DEMAND AND
PRICING, COMPETITIVE AND COST FACTORS, AND THE LIKE, ARE SET FORTH IN THE FLOW
INTERNATIONAL CORPORATION FORM 10-K REPORT FOR 1997 FILED WITH THE SECURITIES
AND EXCHANGE COMMISSION.


                                          10
<PAGE>

                            FLOW INTERNATIONAL CORPORATION



PART II - OTHER INFORMATION


Item 1.  LEGAL PROCEEDINGS

              The Company is party to various legal actions incident to the
normal operations of its business, none of which is believed to be material to
the financial condition of the Company.

Item 2.  CHANGES IN SECURITIES

              None

Item 3.  DEFAULTS UPON SENIOR SECURITIES

              None

Item 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

              None

Item 5.  OTHER INFORMATION

              None

Item 6.  EXHIBITS AND REPORTS ON FORM 8-K

              (a)  Exhibits - None

              (b)  Reports on Form 8-K - None


                                          11
<PAGE>

                            FLOW INTERNATIONAL CORPORATION
                                      SIGNATURES


    Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.


                                                      FLOW INTERNATIONAL
CORPORATION



Date:  October 10, 1997           /s/ Ronald W. Tarrant
                                  ---------------------
                                  Ronald W. Tarrant
                                  Chairman, President and
                                  Chief Executive Officer
                                  (Principal Executive Officer)



Date:  October 10, 1997           /s/ Stephen D. Reichenbach
                                  --------------------------
                                  Stephen D. Reichenbach
                                  Executive Vice President and Chief
                                  Financial Officer (Principal Financial
                                  Officer and Principal Accounting Officer)


                                          12