Seals shaft

Dow Corning, General Electric, and Shinetsu Chemical Company are the principal suppHers of these elastomers in the United States. It is estimated that the volume used in the United States is between 2700 and 3600 t/yr. The primary uses of these elastomers are in O-rings and shaft seals, as weU as wire and cable, and electrical coimectors. [Pg.234]

Graphites (natural or synthetic) are black semireinforcing fillers used almost exclusively in rotary shaft seal applications where surface lubricity and abrasion resistance must be enhanced (see Carbon, natural graphite). [Pg.477]

Sealing tlie Centi-ifiig Chemical Pump Altliougb detailed treatment of. shaft seals is presented iu tbe subsection Sealing of Rotating Shafts, it is appropiiate to mention here tlie special problems... [Pg.906]

Shaft-sealing elements can be split up into two groups. The first type may be called pusher-type seals and includes the 0-ring, V-ring, U-cup, and wedge configurations. Figure 10-116 shows some typic pusher-type seals. The second type is the bellow-type seals, which differ from the pusher-type seals in that they form a static seal between themselves and the shaft. [Pg.941]

When abrasive solid particles must be suspended, maintenance costs for the submerged shaft seal of a side-entering propeller may become high enough to make this type of mixer an uneconomical choice. [Pg.1631]

Effective shaft seals to conserve the process stream... [Pg.2520]

The sleeve bearing has the further advantage that it func tions as a lubricated, pressurized shaft seal to contain the pressure on the process gas (see subsec tion Shaft Seals ). [Pg.2521]

The shaft seal (see subsection Shaft Seals ) generally is a close-clearance labyrinth-type seal. It is desirable that there be available a suitable pressurized buffer gas for injection into the intermediate point in the seal, such gas to be available at an absolute pressure well above the highest shaft pressure to be sealed. Then the seal-gas system may consist of only a filter, a flow-indicating device, and a throttle... [Pg.2523]

Develop alternative agitation methods to eliminate shaft seal as a potential hot spot Train operators to visually check mechanical seal fluid on regular basis Inert vapor space... [Pg.59]

Leakage from Use adequate shaft sealing (mechanical or multimill ignited by pie gas purged lip or chevron seals). Harden spark or hot shafts in seal area surface., pressure tight flexible connections and clamps on mill inlets and outlets Provide adequate fixed fire protection where appropriate CCPS G-23 CCPS G-29 NFPA 13 NFPA 15 NFPA 16... [Pg.98]

Factiiring in general, we observe that there are more eentrihigal pumps. About 90% of the pumps in industry are eentrifugal pumps. And the PD pumps found in industry have much in common with their eentrifugal sisters. They are mostly rotary designed pumps, with precision bearings and a shaft seal. Much of the theory, and system needs, are applicable to both types of pumps. [Pg.56]

Centrifugal (radial inflow) turboexpanders are well adapted to such energy conservation schemes and, with recent developments that have increased their reliability, are suitable for unattended service on a 24-hour, 7-day week operational basis. Some of the recent developments include better shaft seals, thrust bearing monitoring, and superior control devices. [Pg.2]

Positive shaft seals or other special seals... [Pg.10]

Shaft sealing lengtli (based on seal configuration and pressure drop)... [Pg.67]

Tail gas expander without or with adjustable inlet guide vanes (11) and guide vane setting motor (12), labyrinth shaft seals with air sealing... [Pg.94]

Nitrous gas compressor with air-sealed labyrinth shaft seals... [Pg.101]

Gas compressor steam cleaning facility with steam injection in the compressor suction main and in the discharge-side labyrinth shaft seal... [Pg.101]

Due to die extremely toxie nature of nitrous gases, losses to die atmosphere must be avoided. Nitrous gas eompressors and expanders are fitted with suitable shaft seals, often equipped with eonneetions for seal air and vents to the staek. The simplieity of the seal and its assoeiated system make it a reliable element and easy to maintain. [Pg.106]

Shaft seals GG-20 GG-25 GX5CrNil74 GX5CrNil74 GX22CrMoV121 GS17CrMoV55... [Pg.128]

The design of shaft seals must strive to reduee wear of these eritieal eomponents. An overhung turbine design should use a stiff shaft that operates below its first shaft eritieal speed. This will greatly limit the extent of damage in the event of aeeidental or... [Pg.140]

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