Plastic ballasting

Figure 16. Plastic Pall Ring. Note Ballast Ring of Glitsch, Inc. is quite similar. (By permission Notion Chemical Process Products Corporation.)...

Figure 9-6H. Plastic pall ring. Note Glitsch Ballast Ring and others are quite similar. Used by permission of Norton Chemical Process Products Corp., Bull. DC-11 and PTP-1 (11/87).

Figure 9-6T. (Top) Cascade Mini-Ring, (metal and plastic). Originally used by permission of Mass Transfer, Inc., now, Glitsch, Inc. (middle and bottom) Elevation and plan views of Ballast rings (right) and Cascade Mini-Rings (left). Note how high aspect ratio of former permits occlusion of interior surfaces. Low aspect ratio of Cascade Mini-Rings, on the other hand, favors orientation that exposes internal surfaces for excellent film formation, intimate mixing, and gas-liquid contact. Used by permission of Glitsch, Inc. Bull. 345.

Uses Plasticizer in PVC flooring and other flexible PVC products (e.g., bottles, garden hoses, fishing lures, fabric coatings, flexible medical plastics, tarps, and awnings), films, and sheets in vacuum pumps. Also used in fluorescent lighting ballasts manufactured after 1979 as a replacement for PCBs (U.S. EPA, 1998). 

Uses In polyvinyl acetate to improve fiber-tear properties plasticizer for polystyrene in epoxy resins and polyvinyl acetate to improve adhesion and resistance to chemical attack as an insulator fluid for electric condensers and as an additive in very high pressure lubricants. In fluorescent and high-intensity discharge ballasts manufactured prior to 1979 (U.S. EPA, 1998). 

During the construction of the air-supported stills, two cost items were identified which can be reduced substantially curbs and labor for assembling the plastic materials. One suggestion is to use extruded plastic curbing material with sand, water, or concrete for ballast. An extruded plastic cap with built-in grooves could be impressed in the concrete curb while the concrete is fresh. 

Super lntalox saddles are available in ceramic and plastic from the Norton Company. Plastic packings that are normally considered equivalent to the Super lntalox are marketed under the trade name of Flexisaddle by Koch Engineering Company, Inc. Ballast saddles by GUtsch Inc. and Novalox saddles by Jaeger Products, Inc. 

Deep water samples were collected directly from the ship, using a 20-30 1 sampling bottle (Teflon -coated and with pressurization capability, Go-Flo, General Oceanics, USA) which was immersed by means of a non-metallic (Kevlar) hydrowire. To sink the bottle a plastic covered ballast was used, attached to the wire at least 20 m below the bottle. 

Second-generation random Ballast Rings Metal, plastic Koch-Glitsch ... 

Fluid Loads—Ballasted Cycles Heat penetration into volumes of fluid lends to be slow. This is because aqueous products in primary containers usually have a very small surface area relative to their volume. Heat must be conducted through the walls of containers that are most often made from materials like glass or plastic, which are intrinsically poor conductors of heal. Thereafter, uniform temperatures in the fluid are dependent upon convection of heat within the containers. 

PCBs were first manufactured commercially in 1929. Because of the insulating capacity and flame retardant nature of PCBs, they were widely used as coolants and lubricants in transformers and electrical equipment. PCBs were also commonly used in the formulation of a great variety of common products such as plastics, paints and varnishes, pesticides, carbonless copy paper, adhesives, sealants, newsprint, fluorescent light ballasts, and... 

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