Diaphragm drum pumps – TD series

Diaphragm drum pumps – TD series

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Tapflo drum pumps are lightweight and mobile devices enabling convenient emptying of drums and tanks. Their compact design allows for easy transfer of the pump between different containers, so they can be used in various locations, guaranteeing comfortable unloading and easy operation even in demanding industrial conditions. Available in plastic or metal versions, equipped with an immersion tube made of PP, PTFE or AISI 316L steel and a handle made of AISI 316L steel. The tube can be supplied in any length up to 2 meters.

Tapflo plastic diaphragm pumps are a versatile solution for pumping almost any liquid – regardless of its density, chemical aggressiveness or solids content. They are characterized by a compact and simple design, do not require electrical power, and their maintenance is extremely easy.

Tapflo drum pumps are lightweight and mobile devices enabling convenient emptying of drums and tanks. Their compact design allows for easy transfer of the pump between different containers, so they can be used in various locations, guaranteeing comfortable unloading and easy operation even in demanding industrial conditions. Available in plastic or metal versions, equipped with an immersion tube made of PP, PTFE or AISI 316L steel and a handle made of AISI 316L steel. The tube can be supplied in any length up to 2 meters.

Tapflo plastic diaphragm pumps are a versatile solution for pumping almost any liquid – regardless of its density, chemical aggressiveness or solids content. They are characterized by a compact and simple design, do not require electrical power, and their maintenance is extremely easy.

Technical data
Pump capacity: 7.5 m3/h (125 l/min)
Max. discharge pressure: 8 bar
Max size of solids: 3-15 mm
Temperature: 110 °C
Housing materials: PE, PTFE, anti-static PE or PTFE, aluminum or stainless steel AISI 316L
Diaphragm materials: plastic version: PTFE, PTFE 1705B, EPDM, NBR, FKM

metal version: NBR, PTFE or EPDM

Ball valve materials: plastic version: PTFE, EPDM, NBR, AISI 316L steel, PU, Ceramic, FKM

metal version: NBR, PTFE, AISI 316L, EPDM, polyurethane or ceramic

Air distributor materials: plastic version: brass, AISI 316L steel or PET

metal version: brass/NBR or optionally AISI 316L/FKM, PET/NBR or PET/FKM

Basic differences in material designs:
PE HD (polyethylene) High abrasion resistance, 6-7 times better than polypropylene (PP) – this allows the use of such pumps for pumping, e.g., slurries with strong abrasive properties. PE is resistant to most aggressive chemicals, such as concentrated acids and alkalis. The maximum operating temperature is 70 °C.
PTFE (pure polytetrafluoroethylene) High chemical resistance – pumps made of this material can handle even the most corrosive substances, e.g., concentrated nitric acid. The maximum operating temperature is 100 °C.
Aluminum and cast iron For transporting media with a neutral pH, both thick and diluted, containing solid particles or having abrasive properties. Pumps made of aluminum and cast iron can be used, for example, in workshops, the dyeing industry, wastewater treatment plants, etc.
Aluminum with PTFE coating Created 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) Outlet/discharge connections Inlet/suction connections Sizes of Tapflo plastic diaphragm pumpsSizes of Tapflo metal diaphragm pumps
plastic version:
TRD20 24 3/8″ 1/2″ (PE)
3/8″ (PTFE)
TD50 60 1/2″ 1/2″ (PE)
3/4″ (PTFE)
TD100* 125 1″ 1″
metal version:
TXD25* 25 1/2″
TXD70 70 3/4″
TXD100 120 1″
*TD100 available only in PE (without handle)
*TXD25 available only in aluminum
Typical applications
Industry Application example
plastic version:
Chemical acids, bases, alcohols, solvents, latex, emulsions
Food CIP fluids, spices, pigments
Paper glues, slurries, adhesives, thinners, resin, sodium silicate, titanium oxide
Surface treatment galvanic baths, acids, solvents, anode slimes, lacquers, enamels
Sewage treatment plants sludge, flocculants, application to filter presses, neutralization
Electronic transport of liquids, “ultra” pure media, solutions for electrolytic coatings, mercury, solvents
Printing glues, lacquers, inks, paints, latex, acids, resins, pigments
metal version:
General oils, fats, solvents, water, cooling media, lubricants
Chemical acids, alkalis, alcohols, solvents, latex, emulsions
Construction adhesives, oils, pastes, mine water and slurries
Ceramic abrasive liquids, glaze, water, enamels, clay
Printing glues, additives, lacquers, inks, paints, latex, acids, resins, pigments
Key benefits
Advantages of Tapflo plastic diaphragm pumps 1. Installation flexibility
The ports can rotate 180°. Simply rotate the port to adjust its position to the installation. Plastic ports with BSP or NPT internal threads are supplied as standard. Other versions, including stainless steel, are available on request.
2. Massive and durable body
The pump body is machined from a solid block of PE or PTFE. The massive construction protects against mechanical loads as well as aggressive chemicals.
3. Low air consumption
The air supply system has been designed to minimize all air channels. This has eliminated all “dead spaces” and consequently achieved maximum pump efficiency.
4. Design created for chemicals
The multilayer diaphragm has a completely uniform surface (without metal elements) on the medium side. This is an ideal solution for transporting chemicals.
Operation principle
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 the diaphragm’s lifespan.SUCTIONThe 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.
Operating principle of Tapflo diaphragm pumps
Construction
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: EPDM, NBR, FKM, PTFE, PTFE TFM 1705b, white EPDM, PTFE with white EPDM backing, white NBR.

Membrany w pompach membranowych Tapflo
Composite diaphragm design

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.
The elements are joined using chemical agents and adhesives.

Kompozytowa konstrukcja membran w pompach membranowych Tapflo

(1) PTFE TFM layer (2) front layer (3) core (metal) (4) fabric (5) back layer

Dystrybutory powietrza w pompach membranowych Tapflo 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, PET and AISI 316L stainless steel

Ball check valves

Tapflo pumps are equipped with four check valves to ensure that the liquid is pumped in the right direction.
Ball valves are the simplest and most reliable check valve design. They are characterized by tightness and ease of cleaning and replacement.

Available material versions: EPDM, NBR, PTFE, PTFE TFM 1635, PE1000, FKM, PU, Ceramic, SiC, AISI 316L.

Kule zaworowe w pompach membranowych Tapflo
Special versions
ATEX Explosion-Proof Pumps | TX Series

Tapflo diaphragm pumps designed for use in potentially explosive atmospheres, made of anti-static PE and PTFE. They can be used in Zone 1 EX in accordance with the ATEX Directive 2014/34/EU.
The use of anti-static materials ensures that no electrostatic charges will accumulate in the pump. Conductive material additives increase the electrical conductivity of the pump surface.
An example of the application of Tapflo TX diaphragm pumps can be, for example, the transport of alcohols and solvents.

Want to know more? Check out the product page for Tapflo TX diaphragm pumps in ATEX version.

Tapflo Drum Pumps in Explosion-Proof ATEX Version
Pumps with Integrated Pulsation Dampener | TK Series

The integrated pulsation dampener is an ideal solution for eliminating pressure surges in the discharge line wherever space in the installation is limited.

Available for sizes: TRK20, TK50, TK100, TK200

Want to know more? Check out the product page for Tapflo diaphragm pump pulsation dampeners.

Integrated Pulsation Dampener for Tapflo Diaphragm Pumps
  • Technical data

  • Typical applications

  • Key benefits

  • Operation principle

  • Construction

  • Special versions

Pump capacity: 7.5 m3/h (125 l/min)
Max. discharge pressure: 8 bar
Max size of solids: 3-15 mm
Temperature: 110 °C
Housing materials: PE, PTFE, anti-static PE or PTFE, aluminum or stainless steel AISI 316L
Diaphragm materials: plastic version: PTFE, PTFE 1705B, EPDM, NBR, FKM

metal version: NBR, PTFE or EPDM

Ball valve materials: plastic version: PTFE, EPDM, NBR, AISI 316L steel, PU, Ceramic, FKM

metal version: NBR, PTFE, AISI 316L, EPDM, polyurethane or ceramic

Air distributor materials: plastic version: brass, AISI 316L steel or PET

metal version: brass/NBR or optionally AISI 316L/FKM, PET/NBR or PET/FKM

Basic differences in material designs:
PE HD (polyethylene) High abrasion resistance, 6-7 times better than polypropylene (PP) – this allows the use of such pumps for pumping, e.g., slurries with strong abrasive properties. PE is resistant to most aggressive chemicals, such as concentrated acids and alkalis. The maximum operating temperature is 70 °C.
PTFE (pure polytetrafluoroethylene) High chemical resistance – pumps made of this material can handle even the most corrosive substances, e.g., concentrated nitric acid. The maximum operating temperature is 100 °C.
Aluminum and cast iron For transporting media with a neutral pH, both thick and diluted, containing solid particles or having abrasive properties. Pumps made of aluminum and cast iron can be used, for example, in workshops, the dyeing industry, wastewater treatment plants, etc.
Aluminum with PTFE coating Created 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) Outlet/discharge connections Inlet/suction connections Sizes of Tapflo plastic diaphragm pumpsSizes of Tapflo metal diaphragm pumps
plastic version:
TRD20 24 3/8″ 1/2″ (PE)
3/8″ (PTFE)
TD50 60 1/2″ 1/2″ (PE)
3/4″ (PTFE)
TD100* 125 1″ 1″
metal version:
TXD25* 25 1/2″
TXD70 70 3/4″
TXD100 120 1″
*TD100 available only in PE (without handle)
*TXD25 available only in aluminum

Diaphragm pump movies