Globe valves, check valves, safety valves, control valves, etc designed for gaseous oxygen service. These valves are made of suitable materials and have specific features such as extended stem and remote handwheel for installation behind a barrier, throttling plug, etc. They are mainly used in steel plants.
Echinodermata: Morphology. Echinoderms have been compared to living, moving castles. Castles are made of interlocking blocks, with a single main entrance and numerous slit windows for air and for defense.Echinoderm skeletons are made up of interlocking calcium carbonate plates and spines.This skeleton is enclosed by the epidermis and is thus an endoskeleton.astles are made of interlocking blocks, with a single main entrance and numerous slit windows for air and for defense. Echinoderm skeletons are made up of interlocking calcium carbonate plates and spines. This skeleton is enclosed by the epidermis and is thus an endoskeleton.
Some, like the rotifers look like protists and even have cilia but they are made of many cells and have organs like other animals. Shown at the left is a very common pond water critter called a Rotifer.hylum Mastigophora: These protists move with a whip like extension.called a flagella. The flagella is a long fibril that is spirally wound and beats or rotates in the water to move the protozoan about. Included in this group is the Peranema (shown at left), the Euglena and the Volvox.