To obtain prices, speak directly to our technical team or one of our authorized representatives.

The pumps supplied by Dupulação are sold through a technical team. Talk to us and we will indicate the best path.

Dupulação provides a library with technical specifications, performance curves and installation manuals. Visit our technical content section for more details.

Pneumatic diaphragm pumps are versatile, operate without electricity and withstand corrosive, volatile liquids or liquids with suspended solids. They are ideal for applications with uneven suction, submerged operation or risk of dry running. Without a mechanical seal, they reduce the risk of leaks and simplify maintenance.

The price varies depending on the construction material and size of the pump. In general, they are affordable when compared to equivalent technologies. Its low maintenance cost and prompt delivery help reduce downtime.

Essential factors:

1. Fluid type
2. Flow (liters/minute)
3. Discharge pressure
4. Liquid temperature
5. Volatility
6. Viscosity
7. Abrasiveness
8. Presence and size of solids
9. Suction conditions
10. Availability and quality of compressed air

In drainage, filter presses, transfer of chemical products, supply of fuels and lubricants, washing equipment and metal leaching processes, among others.

Use ATEX certified pumps. Duplação provides compatible, grounded and safe equipment against sparks or static charge build-up.

Consult our Chemical Compatibility Table to correctly select construction materials and elastomers.

Yes. Flap valve pumps can transfer fluids with large solids without clogging. Ideal for severe applications and with solid waste.

Factors such as viscosity, temperature, and chemical compatibility are often overlooked. Another common mistake is estimating flow without considering head loss or suction height. Count on our technical support to avoid these problems.

Before installation, follow the instructions in the manual. Important precautions:
• Install close to the fluid source
• Avoid reducing the diameter of the suction line
• Check the pressure and quality of the compressed air
• Use air filter/regulator
• Turn on gradually to avoid cavitation

With an air regulator filter. It allows you to control pressure, protect the system and ensure smoother operation.

Yes. Air consumption directly influences operating costs, as it depends on the compressor. More efficient pumps significantly reduce energy consumption.

Up to 90,000 cst. For even more viscous liquids, it is recommended to adjust the installation: heavy valves, gravity feed and oversized pump.

Fundamental. Dirty or humid air is one of the main causes of failures. Use a filter/regulator and keep the air line in good condition.

Yes. After installation or maintenance, always check the torque as specified in the manual. Vibration and thermal variations can loosen the fixation.

A common practice is to let the pump operate until the first failure, as a reference for useful life. From there, preventive maintenance is scheduled based on this experience.

Diaphragms, balls, seats and flaps. Duplação offers complete kits or individual parts as needed.

The first flaw is the initial parameter. After this, it is recommended to follow a preventive replacement plan, replacing all components on the wet side simultaneously.

Check for erosion wear on chambers, diaphragm plates, seats and sealing surfaces. Sharp or jagged edges indicate a need for replacement.

Exhaust leak (ruptured diaphragm), stalling due to contaminated air and starting failures. All avoidable with preventive maintenance and treated compressed air.

Replace damaged diaphragms, check balls and seats. Having repair kits in stock reduces downtime.

Check material compatibility. Use reinforced diaphragms and, if necessary, pumps with a lower ball valve. Reducing speed also helps preserve components.

Direct the exhaust to a safe area or use pumps with a containment chamber for critical environments.

It could be contamination in the air line or wear in the valve system. Use filter/regulator and check the distribution valve.

No. This indicates rupture of the diaphragm. Replace immediately.

Assess chemical compatibility, temperature, mounting torque, and system conditions. Restriction in suction or wear on the air side may be causing the failure.

Check whether the compressor supplies sufficient air in pressure and volume. Avoid sharing the same air line between several pumps.

Possible causes: water or oil in the air line, frozen muffler, excessive lubrication, ruptured diaphragm or clogged pilot valve.