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Donaldson Company Acquires AirMaze

3 November 1999

Donaldson Company Acquires AirMaze; Acquisition Will Add New Core Product Line To Donaldson's Engine Systems and Parts Business

    MINNEAPOLIS, Nov. 2 -- Donaldson Company, Inc. , a
leading supplier of filtration systems and replacement parts for engine,
industrial and commercial applications, acquired AirMaze, a privately held
supplier of heavy duty air and liquid filters, ail/oil separators and high
purity air filter products.  AirMaze had revenues of approximately $31 million
for the twelve months ended June 30, 1999.  The acquisition closed today.
Terms of the purchase were not disclosed.
    "AirMaze will be an excellent addition for many reasons.  Its industrial
compressor first fit and replacement parts business represents a new core
product line and market opportunity for the Donaldson Company," said Nick
Priadka, senior vice president, Donaldson Engine Systems and Parts.  "The
addition of high quality filters for air and gas compressors advances
Donaldson's overall strategy of providing a comprehensive line of filtration
and exhaust products for engine and industrial customers around the world.
AirMaze is the leading supplier of air/oil separators and ancillary filters to
the North American compressor market.
    "The balance of AirMaze filter lines adds to our offering of high purity
air and specialty liquid filtration products, and strengthens our position in
the heavy duty replacement parts market.  And the acquisition will strengthen
our position with global customers because AirMaze primarily sells its
products to large manufacturers with whom Donaldson already has established
relationships."
    Headquartered in Stow, Ohio, AirMaze employs approximately 300 people in
the U.S. and has manufacturing facilities in Stow, Ohio, Greeneville, Tenn.,
and Carpinteria, Calif.   Plans call for the AirMaze operations to be part of
Donaldson's Engine Systems and Parts business group.
    Donaldson Company, Inc., with annual revenues approaching $1 billion, is a
leading worldwide manufacturer of filtration systems and replacement parts.
The company's product mix includes: air and liquid filters and exhaust and
emission control products for heavy duty mobile equipment; in-plant air
cleaning systems; air intake systems and exhaust products for industrial gas
turbines; and specialized filters for such diverse applications as computer
disk drives, aircraft passenger cabins and semiconductor processing.  Products
are manufactured at more than two dozen Donaldson plants around the world and
through four joint ventures.  The company's shares are traded on the New York
Stock Exchange under the symbol DCI.
    Forward-Looking Statements: Statements that Donaldson may publish,
including those in this announcement, that are not strictly historical are
"forward looking" statements made under the safe harbor provisions of the
Private Securities Litigation Reform Act of 1995. Forward-looking statements
involve known and unknown risks which may cause actual results and corporate
developments to differ materially from those expected, including those risks
described from time to time in Donaldson's SEC filings, including quarterly
reports on Form 10-Q, annual reports on Form 10-K, Exhibit 99 filed with Form
10-K and reports on Form 8-K. This press release contains forward-looking
statements within the meaning of Section 27A of the Securities Act of 1933, as
amended.  Such forward-looking statements are based on the belief of the
management of the Donaldson Company as well as on assumptions made by and
information currently available to Donaldson Company at the time such
statements were made.  Such forward-looking statements relate to, among other
things, the anticipated benefits of the AirMaze acquisition.