Horizontally split casings

Axial (horizontal) split case Radial (vertical) split case Axial (horizontal) split case Radial (vertical) split case... 

Barrel casings are used for high pressures in which the horizontally split joint is inadequate. This type of compressor consists of a barrel into which a compressor bundle of multiple stages is inserted. The bundle is itself a horizontally split casing compressor. 

Figure 4-13. Sidestream radial machines of four to eight stages with horizontally split casing and one or two pairs of intermediate nozzles, generally for connecting external intercoolers.

Figure 4-14. Radial machines of one to eight stages with horizontally split casing, partcularly suitable for compressing nitrous gases. There are no dead spaces provoking buildup of an ammonium nitrate salt.

Figure 3-6. Cross-section horizontal two-stage horizontal split case centrifugal pump. (Courtesy Ingersoll-Rand Co.)...

The location of measurement points for centrifugal pumps depends on whether the pump is classified as end suction or horizontal split-case. 

Horizontal split-case The flow pattern through a horizontal split-case pump is radically different than that through an end-suction pump. Inlet and discharge flow are in the same plane and almost directly opposite one another. This configuration, illustrated in Figure 44.22,... 

Multi-stage Multi-stage pumps may be either end-suction or horizontal split-case pumps. They have two basic impeller configurations, in-line or opposed, as shown in Figure 44.23. In-line impellers generate high thrust loads. 

Figure 44.22 Typical horizontal split-case pump...

Horizontally split casings are easier to open for inspection than vertically split ones, reducing maintenance time. 

Figure 7.9. Some types of centrifugal pumps, (a) Single-stage, single suction volute pump, (b) Flow path in a volute pump, (c) Double suction for minimizing axial thrust, (d) Horizontally split casing for ease of maintenance, (e) Diffuser pump vanes V are fixed, impellers P rotate, (f) A related type, Ihe turbine pump.

DOWEL PINS - Metal pins that guarantee exact alignment of a flange joint on a horizontally split casing as found in turbine construction... 

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