Mepaco® cookers are designed with ASME thermal jackets. The jackets are pressurized and therefore regulated by ASME standards. The ThermaBlend® Cooker features an ASME stay bolt (also called stay-rod) constructed jacket. Mixer-cooker equipment may also have stay-bolt or dimple jacket construction.
Specifically, ASME engineering and construction requirements include approved calculations, ASME-certified techniques and fabricators, testing, and ASME stamps and documentation.
With indirect steam heating, pressurized steam flows through a wrap-around ASME thermal jacket that cooks the product through conduction. Since the potential exists for burn-on, Mepaco’s patented scraper system keeps the surface clean to maximize heat transfer and mitigate sanitation issues. Product applications for indirect steam heating include stews, sauteed vegetables, scrambled eggs, granola, ground beef, and other food products that do not require additional moisture. The indirect steam cooking option can also provide caramelization if needed for the application.
Stay-bolt rods are individually welded between the inner and outer jackets providing a robust jacket design. Due to expansion and contraction caused by heating and cooling with constant blending agitation, the 90+ psig, ASME-rated stay-bolt jackets are recommended for demanding applications of the ThermaBlend® cooker.
Thermablend® cookers are also offered with direct steam injection (DSI). DSI is quick and efficient and eliminates burn-on and the need for a scraper system. Since steam is directly injected into the product, culinary steam filters provide clean steam for your process. Application examples include moist pet food, thick sauces, soups, fillings, and spreads.
Thermablend® cookers can utilize direct, indirect, or both steam heating techniques. Using both indirect and direct steam options will substantially increase batch cycle cooking efficiencies. The viscosity and make-up of the food product, processing, and production requirements dictate which type of Thermablend® and agitator option is the best solution for the application.
Mixer-Cookers are designed with either ASME stay-bolt or dimple jackets that heat product indirectly. Dimple jackets utilize a thin gauge stainless steel layer welded to the tub shell in a regular pattern. The punched and spot-welded areas are called dimples, which create turbulence of the heating or cooling steam or fluid flowing through the jacket.
Mixers, Pump Feeders, and covered Screw Conveyors may utilize ASME dimple jackets to maintain temperature control.
An equipment nameplate will display the ASME stamp and compliance information, and the final certification will be registered with the National Board and made available to the customer. Pressured stay-bolt or dimple jackets over 15 psi, will require ASME compliance.
Should there be a need for refurbishment or repair, please get in touch with Mepaco®, so your ASME jacket will remain compliant and altered by certified ASME specialists who will validate an R-stamp repair. Mepaco® also has compliance expertise with CRN (Canada Registration Number).