options designed for demanding applications. However, their performance differs based on the type
of fluid, temperature, and abrasion level.
This guide explains the key differences between these Tapflo pumps so that plant engineers and
maintenance teams in India can make an informed selection.
Key Takeaways
● Both offer safe, air-operated, and seal-less performance.
● Selecting the right material maximizes uptime and pump life.
What Are PE and PTFE Diaphragm Pumps?
Both are air-operated double diaphragm (AODD) pumps made from solid-block plastics.
They work by alternately flexing two diaphragms to move fluid through check valves using
compressed air. The difference lies mainly in material performance:
● PE (Polyethylene) offers excellent abrasion and impact resistance.
● PTFE (Polytetrafluoroethylene) offers superior chemical resistance.
“Selecting the right pump body PE or PTFE depends on whether the liquid challenges your pump
with wear or with corrosion.”
Tapflo Aftermarket and Service
Detailed Comparison: PE Diaphragm Pump vs PTFE Pump
|
Feature
|
PE Diaphragm Pump
|
PTFE Pump
|
|
Material Strength
|
Solid-block polyethylene (PE)
|
Solid-block polytetrafluoroethylene
(PTFE)
|
|
Primary Strength
|
Abrasion and impact resistance
|
Chemical and corrosion resistance
|
|
Fluid Type
|
Abrasive slurries, viscous liquids, mild
chemicals
|
Strong acids, alkalis, solvents, and
reactive fluids
|
|
Wear Resistance
|
Excellent
|
Moderate
|
|
Chemical
Resistance
|
Good
|
Excellent (universal)
|
|
Temperature
Range
|
Up to {data needed} °C
|
Up to {data needed} °C (higher than PE)
|
|
Cost
|
More economical
|
Higher initial cost
|
|
Conductive
Options
|
Yes (for ATEX use)
|
Yes (conductive PTFE for ATEX zones)
|
|
Common
Industries
|
Ceramics, wastewater, mining, paints
|
Chemicals, pharma, surface treatment,
batteries
|
|
Maintenance
|
Simple, low-cost
|
Simple but higher part cost
|
When to Choose a PE Diaphragm Pump
Choose PE pumps when your application involves mechanical wear, abrasive particles, or high solids.
They handle rough fluids better and last longer in slurry conditions.
Best for:
● Ceramic slip, glaze, and pigment handling
● Sludge and slurry transfer in wastewater plants
● Paints, inks, and coatings with solids
● Mining and minerals (tailings and abrasive liquids)
Why choose PE:
● Superior wear resistance
● Lower purchase cost
● High mechanical durability
When to Choose a PTFE Pump
Choose PTFE pumps when your main challenge is chemical attack or corrosion.
PTFE handles nearly all acids, alkalis, and solvents without degradation.
Best for:
● Acid and caustic transfer in chemical plants
● Surface treatment and electroplating lines
● Pharmaceutical chemical handling
● Solvent and cleaning fluid circulation
Why choose PTFE:
● Unmatched chemical compatibility
● Leak-free and corrosion-proof
● Longer life in aggressive environments
Hybrid Option: PE Pump with PTFE Diaphragms
For multi-purpose plants, Tapflo offers PE pumps with PTFE diaphragms.
This design combines PE’s abrasion resistance with PTFE’s chemical resistance, providing a balanced
solution for mixed-duty applications.
Ideal for:
Chemical plants handling abrasive and corrosive fluids alternately.
Performance Overview
|
Parameter
|
PE Pump
|
PTFE Pump
|
|
Flow range
|
up to {data needed} L/min
|
up to {data needed} L/min
|
|
Max air pressure
|
8 bar
|
8 bar
|
|
Suction lift
|
5 m dry, 8 m wet
|
5 m dry, 8 m wet
|
|
Particle handling
|
up to {data needed} mm
|
up to {data needed} mm
|
|
Expected service life
|
Very long under abrasive duty
|
Very long under corrosive duty
|
Installation and Maintenance Tips
1.Use clean, dry air for both PE and PTFE pumps.
2.Match diaphragm and valve materials to your liquid type.
3.Flush after every batch or shift to prevent deposits.
4.Avoid over-pressurizing above 8 bar.
5.Use original Tapflo spares for reliable sealing and stroke life.
Frequently Asked Questions
1. Can I use PE and PTFE pumps for the same liquid?
Sometimes, yes. For mixed media, a PE body with PTFE diaphragm offers balance.
2. Which pump lasts longer?
In abrasive fluids, PE lasts longer; in corrosive fluids, PTFE lasts longer.
3. Are both pumps ATEX certified?
Yes, conductive versions are available for explosive environments.
4. Can I switch between fluids with one pump?
Yes, but flush thoroughly between fluids to avoid chemical reaction or contamination.
5. What is the key cost difference?
PTFE pumps have a higher initial cost but lower long-term chemical maintenance cost.
Next Steps
Still unsure whether a PE or PTFE diaphragm pump suits your application?
Tapflo India’s technical experts can analyze your media and operating conditions to recommend the
best model.
Visit our ![]()
Aftermarket & Service page for maintenance kits, spares, and expert support.
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