Basic basis for selecting FTI drum pump

The selection criteria for a drum pump should be based on the process flow and water supply and

 drainage requirements, considering five key aspects: liquid delivery volume, system head, liquid

 properties, piping layout, and operating conditions.

1. Flow rate is a key performance metric when selecting an FTI drum pump, directly impacting the

 overall system's production and delivery capacity. For example, the design institute's process design 

can calculate the normal, minimum, and maximum flow rates for a drum pump. When selecting a drum 

pump, consider the maximum flow rate while also considering the normal flow rate. If a maximum flow 

rate is unavailable, a maximum flow rate of 1.1 times the normal flow rate is generally acceptable.

2. The required system head is another crucial performance metric for selecting a drum pump. Generally, 

the head should be increased by 5%-10% to determine the pump's performance.

3. Liquid properties, including the name of the liquid medium, its physical properties, chemical properties, 

and other properties. Physical properties include temperature (c), density (d), viscosity (u), solid particle 

diameter, and gas content in the medium. This affects the system head, effective cavitation margin calculation, 

and the appropriate drum pump type. Chemical properties, primarily referring to the chemical corrosivity and 

toxicity of the liquid medium, are crucial for selecting drum pump materials and shaft seal types.

4. The piping layout of the system refers to data such as the liquid delivery height, delivery distance, delivery 

direction, minimum liquid level on the suction side, maximum liquid level on the discharge side, and other

 data, as well as piping specifications, length, material, fitting specifications, and quantity, enabling system

 head calculation and cavitation margin verification.

5. Operating conditions include a wide range of factors, such as the liquid's operating temperature (T), saturated

 steam pressure (P), suction side pressure (PS) (absolute), discharge side vessel pressure (PZ), altitude, ambient 

temperature, whether operation is intermittent or continuous, and whether the drum pump is fixed or removable.