Classification of Gas Movers

TABLE 3-5 Pump Operation Problems, Causes, and Cures  

PUMP FLOW LOWER THAN RATED CAPACITY  

Same as No Liquid Flow symptom. Suction or discharge line partially dosed. Verify that valves are fully open. 

Same as No Liquid Flow symptom on page 123. Liquid level at source falls below suaion line. Install controls or operating procedures to prevent the drop of liquid level. 

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Figure 3-13 shows the classification of gas movers into two broad categories, based primarily on maximum discharge pressures. The pressure ratio of a fan (absolute discharge pressure to absolute suction pressure) is less than 1.2. The... 

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