Basics|Precision pumping technology 3-4. Solutions to Overfeeding 3: Eliminating the Inertial Resistance

Eliminating the Inertial Resistance

If overfeeding occurs due to inertial resistance, conversely you can say that if you eliminate the inertial resistance, overfeeding will not occur.

Let's review the features of a diaphragm pump.

Features of Diaphragm Pumps

Feature 1: Good quantitative performance
Diaphragm pumps meter the liquid for every transfer, which ensures good quantitative performance.
Feature 2: Discharge volume is mostly unaffected by discharge-side pressure fluctuations
Check valve prevents the liquid from flowing back.
Feature 3: Injection in smaller volumes (compared to centrifugal pumps) is possible
Small volume discharges are easily supported by using a plunger with a smaller diameter or by reducing the stroke speed.
Feature 4: Pulsation
Consider the pulsation to be a feature rather than thinking of it as something that needs to be worked around. Examples of beneficial applications include filling containers with liquid and intermittent spray washing.

How to Eliminate Inertial Resistance

It goes without saying that in order to eliminate inertial resistance, you need to get rid of the pulsation or minimize it to a level where it can be mostly ignored. What you should keep in mind here though, is to eliminate pulsation while retaining the features of a diaphragm pump listed under 1 to 3 above.
Even when you manage to eliminate pulsation, if it is at the expense of other features of the diaphragm pump, there is no point in purchasing costly diaphragm pumps. In such cases, it is better to use centrifugal or tube pumps, which are less expensive.

Based on the above, the effective ways of eliminating the pulsation of a diaphragm pump are as follows:

  • Use an air chamber.
  • Use an accumulator.
  • Use a triple-serial Smoothflow Pump configuration
  • Use a dual-serial Smoothflow Pump configuration

These options will be explained in detail in order from the next section.

TACMINA's Smoothflow Pump is a diaphragm pump with no pulsation, which relieves it from the impact of inertial resistance. Completely eliminate all overfeeding problems.
More...