Two different ultrafiltration systems with diverse arrangement of liquid flow: the apparatus with helical flow generated by the movable element (inner cylinder) and the tubular module with cross flow filtration, were tested by the RTD technique.
Control is by means of a movable element that opens, shuts, or partially obstructs an opening in a passageway.
In a gate valve, the movable element is a wedge-shaped disk that seats against two tapered faces in the valve body.
The movable element may be kept on its seat by a weighted lever or a spring strong enough to hold the valve closed until the pressure is reached at which safe operation requires opening.
If the movable element in the globe valve in the Figure were kept on its seat by gravity or a spring, it would permit flow from left to right but not from right to left.
In the globe valve shown in the Figure (far left), the movable element M may be a tapered plug or a disk that fits a seat on the valve body; the disk may carry a replaceable rubber or leather washer, as in a household water faucet.
Outdoor furnishings and equipment include all of those fixed and movable elements that tend to appear in garden or landscape after the plans are done and installed and therefore without benefit of design control.
In his own brightly packaged version of "The Night Before Christmas," Robert Sabuda illustrates the lightly edited text he credits to Moore in clean, crisp, contemporary graphics featuring a variety of pop-up and other movable elements.
"Founded by Louis XIV in 1663, the Garde Meuble was responsible for supplying the king, his family and household with the movable elements of decoration: textiles, furniture, lighting accessories, table wares, silver and carpets," said Philippe Perrin, a third-generation Paris dealer in 17th- and 18th-century furniture.
They had two studios full of these movable elements, from the rock walls to the walkways and ladders.
