A grouphead (or group head) is the receiver for the removable portafilter (or group handle). A typical consumer espresso machine normally has only one grouphead, while popular professional machines, such as those used at commercial coffee shops, can contain anywhere from one to seven.

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Application of thermal oil boiler orient thermal oil boiler orient in Sugar Mill. Steam is very important for the sugar mill. Steam boiler is used for heating, gelatinization, and saccharify, etc. Heating equipment is equipped under mash kettle, and then steam produced by thermal oil boiler orient enter into the heating equipment, and then heat the raw materials for starch hydrolysis.

This compilation of 123 beautiful black and white photographs document nearly every model built for construction use from 1884 through 1975. Railroad and logging machines, as well as larger mining machines used in construction, are also included. An Index is

The temperature range is 60~180℃, use of boiler in food industries is available for textile industry, which achieves high working temperature (330℃) under low working pressure (10 bar). Except hot oil boiler, oil gas fired steam boiler and biomass water tube steam boiler is also suitable for textile factories.

A barista prepares an espresso-based drink. In these machines, the water used to create steam is also used to brew the coffee. This means the water is near boiling when it reaches the beans and can make the coffee taste bad due to over-extraction.. Iván Mora is a barista at Hola Coffe in Madrid.He says that in steam-driven machines “not only is pressure low, but temperatures are very high”.

Steam donkey, or donkey engine, is the common nickname for a steam-powered winch, or logging engine, widely used in past logging operations, though not limited to logging. They were also found in the mining, maritime, and nearly any other industry that needed a powered winch. Donkeys were often attached to a yarder.

A few points to ponder; wonder how successful those snow motors were? Looks like a good concept. In the logging video, same forest management concepts and logging routines as today, just different equipment and fewer men used nowadays. Last, those lumberjacks looked mighty old. Or maybe they were all under 30 - hard work made'em look 70.