Rpm

Figure 19. Dasher horsepower versus rpm.

Figure 20. Three-cylinder SSHE uses ammonia to cool 6000 lb/h of MDM turkey from 50 to 35°F.

further reduced from these already low levels and an economic sizing is not possible. It also should be noted that a certain minimum dasher speed is required to centrifugally "throw" and hold the scraper blades against the heat transfer cylinder. Therefore, there is a definite optimum dasher rpm that maximizes the net capacity of the heat exchanger for tenacious-type products in cooling applications.

Another reason for using low dasher speeds is retention of product identity. When large particulates are being processed with a sauce or gravy, fast-turning dashers tend to cause breakage of the particulates. The dasher speed

To fillers

Remelt Remelt pasteurizer Remelt tank plate heat exchanger surge

Figure 21. Margarine manufacture.

To fillers

Remelt Remelt pasteurizer Remelt tank plate heat exchanger surge

Figure 21. Margarine manufacture.

Table 3. SFI Values for Typical Shortenings

Melting

SFI value

Table 3. SFI Values for Typical Shortenings

Melting

SFI value

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