How to Choose the Right Diaphragm Pump for Your Application

Choosing the right diaphragm pump can make a significant difference in your operation’s efficiency, safety, and long-term cost. With so many options available—aluminum, stainless steel, plastic, and various port sizes—it’s easy to get confused. This guide will help you make an informed decision.

1. Determine Your Fluid Type

The first question to ask: what are you pumping?

• Corrosive fluids (acids, alkalis): Choose plastic (PP/PVDF) or stainless steel bodies

• Food-grade or pharmaceutical fluids: Stainless steel with food-grade diaphragms

• General industrial fluids (water, oil, solvents): Aluminum alloy is cost-effective

• High-purity fluids: Stainless steel or plastic, depending on chemical compatibility

2. Match the Port Size to Your Flow Requirements

3. Consider Your Operating Environment

• Flammable or explosive atmosphere? Air-operated pumps are inherently safe—no electricity, no sparks.

• Space-limited installation? Compact 1″ or 1-1/2″ models work best.

• Portable application? Aluminum alloy offers the best strength-to-weight ratio.

4. Don’t Forget Diaphragm Material

The pump body is only half the story. Diaphragm material determines chemical compatibility and service life:

• PTFE: Best chemical resistance, ideal for aggressive fluids

• Viton: Good for oils, fuels, and high-temperature applications

• EPDM: Excellent for water, wastewater, and mild chemicals

5. Calculate Total Cost of Ownership

A cheaper pump isn’t always more economical. Consider:

• Energy efficiency (air consumption)

• Maintenance frequency and parts cost

• Downtime impact on your production

Need Help Choosing?

Contact our technical team with your fluid type, flow rate, and operating conditions. We’ll recommend the right configuration for your application.