1 EXHIBIT 23.3 [KPMG PEAT MARWICK LLP LETTERHEAD] ACCOUNTANTS' CONSENT The Board of Directors Aqua-Chem, Inc.: We consent to the use of our report on the financial statements of National Dynamics Corporation included herein and to the references to our firm under the headings "Selected Financial Data of NDC" and "Independent Auditors" in the Prospectus. /s/ KPMG Peat Marwick LLP Omaha, Nebraska December 23, 1998