Powder diaphragm pumps
Powder pumps are an economical and compact alternative to many complex and large powder systems. It has been designed to transfer many industrial and sanitary process powders with a specific gravity from 80 to 720 kg/m³. Built on our standard pneumatic diaphragm pump, the TXP series powder pump uses compressed air to drive 2 diaphragms, which prevents powder blockage.
Generally, if the powder does not stick together after squeezing it in your hand, the Tapflo powder pump can pump it – examples of such powders are: cemented carbides, carbon black, resins and silicones. Due to the specific nature of powders, we always test the pump in a given application first to make sure everything runs smoothly.
FAST FACTS
FEATURES & BENEFITS
Powder pumps are an economical and compact alternative to many complex and large powder systems. It has been designed to transfer many industrial and sanitary process powders with a specific gravity from 80 to 720 kg/m³. Built on our standard pneumatic diaphragm pump, the TXP series powder pump uses compressed air to drive 2 diaphragms, which prevents powder blockage.
Generally, if the powder does not stick together after squeezing it in your hand, the Tapflo powder pump can pump it – examples of such powders are: cemented carbides, carbon black, resins and silicones. Due to the specific nature of powders, we always test the pump in a given application first to make sure everything runs smoothly.
| Pump capacity: | 34 m3/h (570 l/min) | |
| Max. discharge pressure: | 8 bar | |
| Max size of solids: | 3-15 mm | |
| Temperature: | 110 °C | |
| Housing material: | PTFE coated aluminum, AISI 316L stainless steel | |
| Diaphragm material: | PTFE, EPDM | |
| Valve ball material: | PTFE, EPDM | |
| Air distributor material: | brass/NBR, aluminum (hard anodized with Teflon coating)/NBR O-rings, | |
| Main differences in material designs: | ||
| PTFE coated aluminum | Designed for the printing industry, where an alternative to more expensive PTFE pumps was needed, but aluminum was not chemically resistant. Pumps for use wherever a medium with slightly acidic or alkaline properties needs to be pumped. | |
| AISI 316L stainless steel | Castings for these pumps are made using the lost wax method, which ensures high surface quality and dimensional accuracy. They are characterized by mechanical strength combined with chemical resistance. AISI 316L steel is resistant to aggressive substances such as nitric acid and sodium hydroxide. | |
| Available sizes: | |||
| Model | Max. capacity (l/min) | BSP threaded connections | ![]() |
| TXP120 | 158 | 1″ | |
| TXP220 | 330 | 1 and 1/2″ | |
| TXP420 | 570 | 2″ | |
| Application example | |
| Powders | carbides, carbon black, resins, silicones |
How does it work?
Powder transport is carried out by a Tapflo pump powered by compressed air. This is done using two diaphragms that operate in cycles opposite to each other, when one pumps the other sucks in, the next cycle reverses.
Powder transport is hermetic – there is no contact with air.
No starting problems
The air injection system eliminates the problem of powder backflow during pump startup. The amount of injected air can be manually adjusted to ensure optimal operation.
Explosion-proof pumps
The powder pump series is available in versions for explosion hazard zones. The certificate complies with group IIG/IID, category 2.
Complete air injection system in all powder pumps:
Air is injected into the pump on the powder side, which allows it to be dispersed. The injected air flow can be manually adjusted using a needle valve, which allows for optimal pump performance adjustment.
The air injection system eliminates the problem of powder pockets forming when starting the pump.
The Tapflo diaphragm pump is powered by compressed air. Two diaphragms work alternately, pushing liquid into the pumping system. Ball valves act as check valves, directing the liquid in the right direction.
During each cycle, the air pressure behind the discharge diaphragm is equal to the liquid lift height on the medium side. This means that Tapflo diaphragm pumps can operate with a closed discharge valve without negatively impacting diaphragm life.
SUCTION
The retracting diaphragm creates a vacuum, and thus the phenomenon of medium suction.
DISCHARGE
The second diaphragm simultaneously transfers air pressure to the medium in the second diaphragm chamber, pushing it towards the discharge port.
| Long-life diaphragms
Tapflo diaphragms are composite constructions, ideal for working in harsh conditions, providing a completely uniform surface in contact with the medium. This allows to avoid leaks through the diaphragm and keep it clean. Diaphragms are available in various materials and colors to suit all needs. Available material versions: PTFE, EPDM ![]() The advanced manufacturing, curing, trimming and finishing process ensures a long service life of the composite diaphragm, which will last for many millions of strokes. The component materials are specially made and adapted to the composite diaphragm technology and the molding process with pressing. |
(1) PTFE TFM layer (2) front layer (3) core (metal) (4) fabric (5) back layer |
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Economical power supply – air distributors
The air distributor, which redirects compressed air to the chambers behind the diaphragms, is the heart of the pump. The distributor is located in the center of the pump between the diaphragms to minimize the air path and dead spots. This design is the key to reliable and economical operation. Thanks to a special sealing system, the distributor does not require lubrication. This not only saves money, but also protects the environment. Available material versions: brass/NBR, aluminum (hard anodized with Teflon coating)/NBR O-rings |
| Ball check valves
Tapflo pumps are equipped with four check valves to ensure that the liquid is pumped in the right direction. Available material versions: PTFE, EPDM |
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| Pump capacity: | 34 m3/h (570 l/min) | |
| Max. discharge pressure: | 8 bar | |
| Max size of solids: | 3-15 mm | |
| Temperature: | 110 °C | |
| Housing material: | PTFE coated aluminum, AISI 316L stainless steel | |
| Diaphragm material: | PTFE, EPDM | |
| Valve ball material: | PTFE, EPDM | |
| Air distributor material: | brass/NBR, aluminum (hard anodized with Teflon coating)/NBR O-rings, | |
| Main differences in material designs: | ||
| PTFE coated aluminum | Designed for the printing industry, where an alternative to more expensive PTFE pumps was needed, but aluminum was not chemically resistant. Pumps for use wherever a medium with slightly acidic or alkaline properties needs to be pumped. | |
| AISI 316L stainless steel | Castings for these pumps are made using the lost wax method, which ensures high surface quality and dimensional accuracy. They are characterized by mechanical strength combined with chemical resistance. AISI 316L steel is resistant to aggressive substances such as nitric acid and sodium hydroxide. | |
| Available sizes: | |||
| Model | Max. capacity (l/min) | BSP threaded connections | ![]() |
| TXP120 | 158 | 1″ | |
| TXP220 | 330 | 1 and 1/2″ | |
| TXP420 | 570 | 2″ | |