How to Avoid Pitfalls When Selecting a Pneumatic Diaphragm Pump

Nov,13,2026

Many factories consider factors such as models and accessories when purchasing pneumatic diaphragm pumps, but after installation, problems such as clogging, corrosion, failure to suck up materials, or poor durability occur. What causes this? How can you avoid pitfalls when selecting a pneumatic diaphragm pump:

Step 1: Drive mode
Here, I believe procurement personnel can determine whether to choose pneumatic or electric form. Here is a summary: for explosion-proof, mobile, intermittent operation, and chemical hazardous chemical conditions, pneumatic diaphragm pumps are preferred. If long-term continuous operation without shutdown, no air source, or PLC speed control and automatic control are required, electric diaphragm pumps are preferred.

Step 2: Confirm the conveyed medium and match the wetted materials
90% of pump failures are due to material mismatch. Many customers only look at flow rate and caliber, ignoring medium properties, resulting in corrosion, diaphragm swelling, material shedding, and leakage after only a few days of use.
For selection, only 4 key pieces of information need to be confirmed:

  • 1. What medium is being conveyed: sauce, sewage, acid-base liquid, organic solvent, etc.
  • 2. Medium concentration, temperature, and corrosion severity
  • 3. Whether the liquid contains particles, impurities, or powder
  • 4. Whether it contains solvents (which very easily cause ordinary diaphragms to swell and crack)

Based on the medium, the manufacturer accurately matches the complete set of pump body material, diaphragm material, valve ball, and valve seat. For strong acids, strong bases, and strong oxidizing media, professional manufacturers must provide one-on-one matching and must not use general selections.

Step 3: Calculate flow rate, head, and suction lift (according to actual working conditions)
Many people only look at the rated data in the parameter table and ignore pipeline losses and actual height differences, resulting in insufficient flow rate or failure to pump materials for the selected pump. The correct calculation method:

GODO