Centrifugal plastic pumps – CTP series

Centrifugal plastic pumps – CTP series

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Thermoplastic centrifugal pumps ideal for pumping aggressive media with solids, including strong acids. They are characterized by a simple and optimized design with wetted parts made of 100% plastic (PP or PVDF). CTP centrifugal pumps are equipped with a mechanical seal on the dry side of the pump, so that all metal parts are protected from corrosion. In case of leaks, there is a drain connection in the rear casing to collect leaks, which prevents contact of the process liquid with the motor and shaft. Any pump maintenance takes a few minutes with very low operating costs.

CTP centrifugal pumps are designed for chemical transfer and circulation in the surface treatment industry. They can be used, among others, in the food, chemical and electroplating industries.

Thermoplastic centrifugal pumps ideal for pumping aggressive media with solids, including strong acids. They are characterized by a simple and optimized design with wetted parts made of 100% plastic (PP or PVDF). CTP centrifugal pumps are equipped with a mechanical seal on the dry side of the pump, so that all metal parts are protected from corrosion. In case of leaks, there is a drain connection in the rear casing to collect leaks, which prevents contact of the process liquid with the motor and shaft. Any pump maintenance takes a few minutes with very low operating costs.

CTP centrifugal pumps are designed for chemical transfer and circulation in the surface treatment industry. They can be used, among others, in the food, chemical and electroplating industries.

Technical data
Pump capacity: 28 m3/h (466 l/min)
Max. discharge pressure: 6 bar
Temperature: 90 °C
Viscosity: 200 mPa·s
Casing material: PP-GF (30%) or PVDF
Impeller material: PP or PVDF
Mechanical seal: rotating parts: SiC or graphite; stationary parts: SiC or ceramic; spring: Hastelloy® C-276
O-rings: EPDM, FFKM, FEP/FKM
Electric motor: IEC standard, 3×400 VAC, 2900 rpm, IP55, B34 mounting flange
Main differences in material versions:
PP PP (polypropylene) is resistant to most chemical media up to 70 °C. It is an ideal solution for pickling baths or surface degreasing.
PVDF PVDF (polyvinylidene fluoride) has excellent mechanical properties and chemical resistance. It is an excellent solution for hot liquids up to 90 °C, e.g. for hot hydrofluoric acid.
Available sizes and connections:
Model BSPT male thread (standard) DIN 2633/PN 16 flange Hose
inlet outlet inlet outlet inlet outlet
CTP 32-12 1 ¼” 1″ DN32 DN25 Ø32 Ø25
CTP 50-12.5  2″ 1 ½” DN50 DN40 Ø50 Ø40
Typical applications
Industry Application example
Food Pumping liquids in the CIP process.
Chemical Transfer and pumping of chemicals and industrial detergents. Supplying and unloading storage tanks, filters, containers, wells.
Galvanic Transfer and circulation in galvanic processes.
Water treatment Dosing acids and bases in nanofiltration processes, transfer of liquids in water treatment plants
Demineralization Circulation of demineralized water and transfer in many industrial applications.
Photo development Chemicals in the photographic industry.
Liquid crystal production Acids and bases.
Key benefits
Konstrukcja tworzywowych pomp wirowych Tapflo CTP 1. Mechanical seal
All metal parts are protected from contact with the liquid.
2. Wetted parts made of PP and PVDF
The pump can handle aggressive liquids containing solid contaminants, including ferritic ones. The pump can operate with high-temperature media.
The PP-GF (glass fiber reinforced polypropylene) pump construction ensures high mechanical strength and allows pumping media at temperatures up to 70°C. PVDF has greater chemical resistance and allows operation at temperatures up to 90°C.
3. Excellent chemical resistance
Wetted parts are made of non-metallic, injection-molded thermoplastic, providing excellent corrosion resistance.
The shaft is protected by a plastic sleeve and a nut compatible with the pump housing material.
4. Semi-open impeller
Allows pumping high viscosity liquids and liquids containing solid particles up to Ø3 mm in size and 10% concentration.
5. Safety drain
A special inspection hole in the rear part of the housing ensures drainage of water from the mechanical seal in case of any leakage.
This prevents contact of the motor and shaft with the pumped liquid. The PVDF connection allows for hose connection and redirection of the liquid away from the pump.
Operation principle

Operating principle of the Tapflo centrifugal pump

The two main parts of a centrifugal pump are the impeller with vanes and the pump casing. Liquid enters the pump through the suction connection near the center of the rapidly rotating impeller. The liquid on the suction side moves along the impeller axis and, due to the centrifugal force generated by the vanes, is thrown radially outwards into a chamber in the casing. The casing gradually expands spirally towards the discharge nozzle, which reduces the liquid velocity and thus increases the pressure (diffuser effect). At the same time, as the liquid is thrown radially outwards by the impeller towards the discharge connection due to centrifugal force, the pressure at the center of the impeller drops, enhancing the suction effect of the liquid into the pump, which enables a continuous liquid transfer process.

Want to know more? Check out our compendium of knowledge about centrifugal pumps!

Construction
Semi-open impeller for Tapflo CTP centrifugal pumps

Semi-open impeller

Enables pumping of liquids with particle diameters up to 3 mm and concentrations up to 10%. The semi-open impeller also improves the transfer of higher viscosity liquids.

Mechanical seal

The spring is located on the dry side of the pump, so all metal parts are protected from contact with the liquid. This means that a flexible bellows is not required.

Mechanical seal of Tapflo CTP centrifugal pumps
  • Technical data

  • Typical applications

  • Key benefits

  • Operation principle

  • Construction

Pump capacity: 28 m3/h (466 l/min)
Max. discharge pressure: 6 bar
Temperature: 90 °C
Viscosity: 200 mPa·s
Casing material: PP-GF (30%) or PVDF
Impeller material: PP or PVDF
Mechanical seal: rotating parts: SiC or graphite; stationary parts: SiC or ceramic; spring: Hastelloy® C-276
O-rings: EPDM, FFKM, FEP/FKM
Electric motor: IEC standard, 3×400 VAC, 2900 rpm, IP55, B34 mounting flange
Main differences in material versions:
PP PP (polypropylene) is resistant to most chemical media up to 70 °C. It is an ideal solution for pickling baths or surface degreasing.
PVDF PVDF (polyvinylidene fluoride) has excellent mechanical properties and chemical resistance. It is an excellent solution for hot liquids up to 90 °C, e.g. for hot hydrofluoric acid.
Available sizes and connections:
Model BSPT male thread (standard) DIN 2633/PN 16 flange Hose
inlet outlet inlet outlet inlet outlet
CTP 32-12 1 ¼” 1″ DN32 DN25 Ø32 Ø25
CTP 50-12.5  2″ 1 ½” DN50 DN40 Ø50 Ø40

Performance curves

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