Perforated tubing

Internal Cake Tube Filters or Liquid Bag Filters This type of filter, such as manufactured by Industrial Filter and Pump Mfg. Co., Rosedale, Illinois, and many others, utihzes one or more perforated tubes supported by a tube sheet or by the hp of the pressure vessel. A cyhndrical filter bag sealed at one end is inserted into the perforated... 

Tubes and Perforated Tubes Electrodepositing nickel non-adherently all over the curved surface of a cylinder, and then sliding off the coating, produces a tubular nickel product. Some tubes manufactured in this way are plain, but most are perforated. They are used industrially for screen printing textiles, carpets and wall paper . 

Spiral-wound modules consist of several flat membranes separated by turbulence-promoting mesh separators and formed into a Swiss roll (Figure 16.18). The edges of the membranes are sealed to each other and to a central perforated tube. This produces a cylindrical module which can be installed within a pressure tube. The process feed enters at one end of the pressure tube and encounters a number of narrow, parallel feed channels formed between adjacent sheets of membrane. Permeate spirals roward the perforated central tube for collection. A standard size spiral-wound module has a diameter of about 0.1m, a length of about 0.9 m and contains about 5 m2 of membrane area. Up to six such modules may be installed in series in a single pressure tube. These modules make better use of space than tubular or flat sheet types, but they are rather prone to fouling and difficult to clean. 

Eker S. and F. Kargi (2006). Impacts of COD and DCP loading rates on biological treatment of 2,4-dichlorophenol (DCP) containing wastewater in a perforated tubes biofihn reactor. Chemosphere 64 1609-1617. 

To the definition given under item (a), may be added that propellant igniters consist of a charge of quick-burning BkPdr (See BLACK POWDER in Ref 44, p B171), which can be either in the form of a compressed disc attached to a "simple"primer or in the form of small grains contained in a perforated tube. In a 3rd method, loose BkPdr is contained in a Small cloth bag which is placed, during... 

British, German, Italian, Russian and Japanese proplnts examined at Picatinny Arsenal during WWII included squares, perforated discs, single-perforated tubes, single perforated grains, multi-perforated grains, spheres and strips. The basic idea behind the use of the varied forms is connected with the desire for a propint with a... 

John Scoffern makos a valve of elastic material over a perforated tube. 

Any distinction between cordite and ballistite which is based upon the methods by which the materials are manufactured is now no longer valid. Certain cordites are made without the use of a volatile solvent. Ballistites are made from soluble and from insoluble nitrocellulose, with and without the use of acetone, ethyl acetate, or other volatile solvent. Cordite is the name of the propellant which is used by the British armed forces. Ballistite, generally in flakes, sometimes in cords and in single-perforated tubes, is the preferred military powder of Italy, Germany, and the Scandinavian countries. 

The gases are introduced via five perforated tubes positioned in the flow direction, so that a uniform flow can be established. A short flow path to the wafer surface is chosen to minimize any gas phase reactions. The reactant gases are rapidly removed from the reaction zone and exhausted downward. 

Figure 10. Diagram of the calculated element of the SSH 1 - fin 2 - sorbent 3 - shell of the heating element 4 - channel for gas discharge formed by the perforated tube and the cylinder body 5 - cylinder body.

The burning rate describes the velocity with which the volume of the burning propellant changes. It is proportional to the linear burning rate and in addition it depends on the specific shape of the propellant (size of the powder elements and conformation, e.g. flakes, spheres, tubes, multi-perforated tubes etc. extending to the most complicated shapes of rocket propellant charges). 

Different perforated tubing pattern uiln( oacllletlng aendrel dtt... 

Mechanical movement action in a die is used to extrude these different profiles such as tubing or strapping with varying wall thicknesses or perforated wall. It is usually accomplished by converting rotary motion to a linear motion that is used to move or oscillate the mandrel. For certain profiles, such as the perforated tubing, the orifice exit would include a perforated section usually on the mandrel. 

An experimental apparatus that under certain conditions approximates closely a well-stirred reactor is a spherical chamber into which premixed reactants are injected centrally through a perforated tube and out of which the reaction products flow through a number of ports located at various positions in the outer shell. The mixing is driven by the fuel-injection jets that are formed at the tube perforations, and the apparatus has been called the jet-stirred reactor. The average residence time of an element of gas in the reactor is... 

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