Rotary lobe blower

Figure 6-43. Screw-type rotors for rotary lobe blower. By permission. Roots Division, Dresser Industries, Inc.

Vacuum capacities and operating ranges, table, 344, 355 Ejectors, 344, 357 Integrated systems, 344 Liquid ring pumps, 344 Rotary lobe blowers, 344 Rotary piston pumps, 344 Rotary vane pumps, 344 Vacuum equipment, 343 Applications diagram, 352 ASME Code, 344 Pumps, 382 Steam jets, 357 Vacuum flow,... [Pg.630]

Operating chart, 385 Operating range, 386 Performance curve, 386 Rotary displacement pump, 397 Rotary lobe blowers, 390, 392, 394 Rotary lobe performance curves,... [Pg.630]

Screw-type rotary lobe blower, 390-391 Vacuum relief, 435... [Pg.630]

Vacuum blowers (vacuum pumps) are used to draw waste nitrogen, carbon dioxide, and water vapor from the adsorber vessels during the evacuation step. There are two rotary-lobe blowers operating in series. They are positive displacement machines. A timing gear arrangement maintains the close tolerances that are essential for ef cient operation. [Pg.134]

The feed air blower, a single rotary-lobe blower, is used to bring air into the plant at a maximum pressure ranging from 0.344 to 0.551 barg. The machine operates similarly to the vacuum blower except that the air blower operates at pressure, not vacuum, and is not water injected. [Pg.140]

Liquid ring pumps, rotary lobe blowers and root pumps presently allow only small suction volumes, which lead to a large number of machines. At a suction pressure of 100 mbar the compression of 0.34 million mN would require, for example, about 60 liquid ring pumps. [Pg.222]

Rotary Blowers or Rotary Lobe-Type Blowers... [Pg.395]

Rotary Two-ImpeUer (Lobe) Blowers and Vacuum Pumps... [Pg.518]

Figure 7.19. Some rotary positive displacement compressors, (a) A two-lobe blower, (b) Performance of a two-lobe blower (Rools-Connersville Co.), (c) A screw pump with one power and two idle rotors (Kristal and Annett, 1940). (d) Performance of 3.5" screw pump handling oils at 1150 rpm against 325 psig (Kristal and Annett, 1940). (e) Principle of the liquid ring seal compressor (Nash Engineering Co.). (0 A sliding vane blower (Beaeh-Russ Co.).

Dry Vacuum Pumps (DVPs) These use the operating principles of rotary-lobe roots blowers, claw compressors or screw compressors, and hence require electrical power. They run dry and hence at very high temperature due to the heat of compression. Usually,... [Pg.319]

Blowers, rotary lobe maximum pressure ratio 2 1. [Pg.45]

Fans Prefer backward bladed because they are self-limiting in power demand. Blowers For rotary lobe when used for pressure pneumatic conveying install a check valve in the blower discharge. [Pg.47]

Blowers, rotary lobe, cast iron, 70 kPa g, drip proof motor and drive single stage. [Pg.381]

Straight-lobe compressors, or blowers, as they are commonly called are low-pressure machines. The feature unique to these compressors is that the machines do not compress the gas internally as do most of the other rotaries. The straight-lobe compressor uses two rotors that intermesh as they rotate (see Figure 1-7). The rotors are timed by a set of gears. The lobe shape is either an involute or cyclodial form. A rotor may have either two or three lobes. As the rotors turn and pass the inlet port, a volume of gas is trapped and carried between the lobes and the outer... [Pg.121]

Rotary blowers are of the positive displacement type, and a typical lobe-type of machine is shown in Figure 8.34. The rotors are driven in opposite directions so that, as each passes the inlet, it takes in gas which is compressed between the impeller and the casing before being expelled. Machines of this type are capable of developing pressure differentials of up to 100 kN/m2 they are made in a wide range of sizes, with maximum throughputs of up to 20.000-30,000 m3/h. [Pg.344]

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