INSTALLATION AND OPERATION MANUAL, DIRECT STEAM SINGLE & TWIN MIXER
KETTLE, MODELS DLTM-40 TO DLTM-100 AND DLTM-40-2 TO DLTM-100-2
3.0 INTRODUCTION
DESCRIPTION
All Crown direct connected steam jacketed kettles pertaining to this manual are direct steam
operated pressure vessels of a double-wall stainless steel construction forming a steam
chamber (jacket) enveloping the lower two thirds of the kettle bowl surface. All kettles are
tilting, floor mounted in fixed positions on legs with adjustable flanged feet. All kettles are
equipped with a safety relief valve and a steam control valve.
CAPACITIES
All models are suffixed with either -40, -60, -80 or -100 to indicate the capacity of that kettle in
US gallons. Thus a DLTM-40 is a two thirds jacketed direct steam kettle mounted on legs with
a capacity of 40 gallons (US).
FUNCTIONING MODE
Crown direct connected steam jacketed kettles consist of a stainless steel bowl and a stainless
steel jacket which envelopes two thirds of the lower surface of the bowl thus forming a sealed
pressure vessel (chamber) into which steam is introduced by means of a manual control valve.
The kettle bowl is the container for the food product which ideally should be of a liquid or semi-
liquid consistency to achieve complete contact with the bowl surface and thus fully absorb the
heat transmitted through that surface.
The temperatures required for the cooking process to function adequately must be greater than
the boiling point of the liquid food product. Further, the greater the steam pressure used, the
higher the temperature and consequently the quicker the cooking process. For example, steam
pressurized at 30 psi attains a temperature of 274 degrees Fahrenheit (135 Celsius).
In the initial stages of the cooking process when the steam comes in contact with the cold kettle
bowl surface it condenses and forms considerable amounts of water. A thermostatic steam
trap should be plumbed to the exit end of the kettle jacket. This trap is a mechanical device
that closes on high temperatures and opens when the temperature drops thus allowing the
water formed from condensate to exhaust but retain steam under pressure.
Part No. 10040R4
6
2018-12-05
