APG(TM) Series from Waukesha Engine Makes Its European Debut at Power Gen Europe

COLOGNE (May 30, 2006) - Waukesha Engine's new APG(TM) (Advanced Power Generation)
Series of high-efficiency, low-emission, gaseous-fueled engines is making its first European
appearance at the Power Gen Europe Show here, May 30-June 1.

With the introduction of the APG Series, Waukesha now offers power generation units in the
essential 1 MW to 3 MW range in 50 and 60 Hz configurations for the world power generation
market. With two-stage intercooling design to maximize total heat recovery and lower overall
energy costs, the new APG Series is ideally suited for combined heat and power (CHP)

"The APG Series is aimed at the large segment of the power generation market that demands
high efficiency, low emissions and lower operating costs simultaneously," said Paul Cannestra,
vice president, marketing for Waukesha Engine, a business unit of Dresser Inc. "The APG
Series is a bridge between the robust Waukesha Engine design that has been so highly valued by
our traditional customer base and the state-of-the-art technology required by the power
generation market."

The APG1000 Enginator® Genset
The APG1000 Enginator genset is a 1 MW unit that extends Waukesha's high-speed product
offering into the 800 to 1100 kW range. Used alone or grouped with other units, this one
megawatt genset is one of the key building blocks in developing gas-driven power generation
solutions that meet customer needs.

The APG1000 has been developed in cooperation with the U.S. Department of Energy (DOE) as
part of the DOE's Advanced Reciprocating Engine Systems (ARES) program. The ARES
program was created to accelerate the development of large natural gas engines that operate with
increased efficiency while meeting tight emissions requirements, maintaining current levels of
reliability and durability, and reducing ownership costs.

The APG1000 is a 16-cylinder, turbocharged, intercooled, lean combustion power generation
unit that features ultra-low NOx capability and patented ignition system and combustion
chamber concepts. It is rated at 1000 kW at 50 Hz and 1100 kW at 60 Hz - 1500 and 1800 rpm,
respectively. It is one of the most efficient 1 MW units available at 1800 rpm, 42 % BTE (brake
thermal efficiency) and is among the lowest in lean burn emissions (500 mg/nm3-hr NOx). At 42
% BTE, the APG1000 is six percentage points better than the previous generation of the engine
from which the APG1000 is derived.

One of the keys to developing a higher efficiency gas engine is increasing power density. The
APG1000 delivers 40 percent higher power output within a smaller footprint than the previous
generation of engines built on a similar platform, to reduce installation costs.

The APG 2000 and 3000 Enginator Gensets
The APG2000 and APG3000 models are turbo-charged, intercooled, lean combustion units that
are among the best in class for efficiency (42.5% BTE) and low emissions. (TA-Luft, 500
mg/nm3-hr NOx, and half T/A Luft capability.) The APG2000 is a 12-cylinder unit rated at 2100
kW at 50 Hz and 1860 kW at 60 Hz, at 1500 and 1200 rpm, respectively. The APG3000 is an
18-cylinder model rated at 3200 kW at 50 Hz and 2800 kW at 60 Hz, at 1500 rpm and 1200 rpm,

Both units are also rated best in class for their transient load capability - the ability to handle
rapid increases in load demand - which is essential for prime power, off-grid applications. This
rapid response is made possible by the engines' multi-point fuel injection system which is
designed to operate in conjunction with Waukesha's engine control system.

ESM® Engine Control System is Standard
Waukesha's proven ESM® fully-integrated engine control and diagnostics system is standard on
all three APG models. The ESM system integrates air-fuel ratio control, spark timing control,
speed governing, knock detection, start/stop control, diagnostic tools, fault logging, engine
safeties, an engine service program and ignition power module diagnostics.

All APG Enginator units feature Waukesha's new ECP5006E switchgear control panel that is
pre-programmed for interface with Waukesha's ESM engine control system to provide seamless
communication between the engine and the generator. The new panel includes Waukesha's
Electronic Service Program which enables the operator to view data or change settings for the
ESM from the ECP5006E panel without requiring a separate computer hookup.

The ECP5006E control panel records operating data at five-minute intervals to provide the
operator with a daily history log to track the genset's performance. The new control panel is
equipped with a built-in webserver to enable remote monitoring of operating data via the Internet
and utilizes a touch screen Windows XPe computer with a 15-inch color monitor for easy access
to data. The panel meets the UL1558 standard and can be easily modified to meet IEC/CE

All three models of the APG will be available in engine-only versions -- the 16V150LTD rated at
1350-1530 bhp; the 12V220GL rated at 2625 to 2950 bhp, and the 18V220GL rated at 3922 to
4425 bhp. Waukesha is accepting orders for the APG1000 Enginator genset and the APG
16V150LTD engine for shipment in 2006; and for the APG 2000 and 3000 Enginators and
engines-only for shipment in 2007.

About Waukesha Engine
Founded in Waukesha, Wis. in 1906, Waukesha Engine, a business unit of Dresser Inc., is a
manufacturer of spark-ignited, gaseous-fueled engines widely used in power generation, field gas
compression and other mechanical drive applications. Waukesha Engine also packages Enginator
gensets and DC switchgear controls for the distributed generation market. Waukesha Engine's
manufacturing and power systems facilities, located in Waukesha, are ISO 9001 certified. The
company's Web site can be accessed at www.waukeshaengine.dresser.com.

About Dresser Inc.
Dresser Inc. is a worldwide leader in the design, manufacture and marketing of highly
engineered equipment and services sold primarily to customers in the flow control, measurement
systems, and compression and power systems segments of the energy industry. Headquartered in
Dallas, Texas, Dresser has a comprehensive global presence, with a sales presence in more than
100 countries worldwide. The company's Web site is www.dresser.com.

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