Self-priming industrial centrifugal pumps – CTS I series

Self-priming industrial centrifugal pumps – CTS I series

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The CTS series are self-priming centrifugal pumps with an open impeller allowing the lifting of media from a level of -4.5 m. The CTS centrifugal pump is characterized by an optimized design based on the elements of the standard Tapflo CT pump. By replacing only one element (housing) we gain many advantages of a self-priming pump. The pump can therefore suck media with a high air content from a lower level than the pump’s installation level.

Tapflo CTS self-priming pumps are available in two versions – industrial (CTS I) and hygienic (CTS H).

The CTS I self-priming industrial centrifugal pump is made of 316L stainless steel and thanks to its high mechanical strength and chemical resistance is intended for industrial applications in general industry, chemical, refinery or wastewater treatment plants.

The CTS series are self-priming centrifugal pumps with an open impeller allowing the lifting of media from a level of -4.5 m. The CTS centrifugal pump is characterized by an optimized design based on the elements of the standard Tapflo CT pump. By replacing only one element (housing) we gain many advantages of a self-priming pump. The pump can therefore suck media with a high air content from a lower level than the pump’s installation level.

Tapflo CTS self-priming pumps are available in two versions – industrial (CTS I) and hygienic (CTS H).

The CTS I self-priming industrial centrifugal pump is made of 316L stainless steel and thanks to its high mechanical strength and chemical resistance is intended for industrial applications in general industry, chemical, refinery or wastewater treatment plants.

Technical data
Pump capacity: 54 m3/h (900 l/min)
Head: 40 m
Max. discharge pressure: CTS-C: 2.5 bar
CTS-D,E: 4 bar
Max size of solids:
6 mm
Temperature: 90 °C
Viscosity: 200 mPa·s
Casing material:
AISI 316L stainless steel
Impeller material: open, made of AISI 316L, optionally semi-open impeller
Mechanical seal: single: ceramic/graphite (standard), SiC/SiC or SiC/graphite, optionally with oil chamber or external flushing
O-rings: EPDM (standard), FKM, FEP/silicone or NBR
Electric motor: IP55, IEC flange B3/B14 (B3 for version with extended shaft). Available with ATEX Ex e or Ex d certificate. Other motors available on request.
Available sizes and connections:
Model
BSPT male thread (standard) BSPP (G) female thread
inlet outlet drain
CTS I C… 1 ½” 1 ½” ⅜”
CTS I D… 2 ½” 2″ ⅜”
CTS I E… 2 ½” 2″ ⅜”
Typical applications
Industry Application example
General Acids, bases, oil, grease, coolants, detergents, cleaning and washing agents, cooling or heating media. Supplying and unloading storage tanks, containers, filters, wells. Supplying process equipment, dosing systems, dosing units, research stations.
Chemical and refinery Oil, fuel, chemicals, chemical reagents, suspensions, solvents, concentrated or diluted acid and base in ATEX explosion hazard zones.
Sewage treatment plants Sewage, suspensions, emulsions.
Operation principle

Operating principle of the Tapflo CTS self-priming centrifugal pump

(1) To ensure self-priming capability, fill the pump housing with liquid as shown in the drawing.

(2) After starting, the pump slowly begins to draw air from the pipeline, creating a vacuum and lifting the liquid. Air is mixed with the liquid in the pump housing. The discharge valve must be open to allow self-priming. Air escapes through the discharge piping, and the liquid is returned to the impeller because it has a higher density than the air-liquid mixture.

(3) This process continues until the suction line is completely emptied of air, and the pump operates as a standard centrifugal pump.

Construction

Self-priming casing

The CTS series pump features an optimized design based on the elements of the standard CT pump. By replacing just one element (the standard casing with a self-priming casing) we gain many advantages of a self-priming pump.

The pump can therefore suck in medium with a high air content from a lower level than the pump’s installation level. After the pumping process, an appropriate amount of medium remains in the casing, and the pump’s design allows it to be restarted without priming.

Open impeller for Tapflo CT centrifugal pumps

Open impeller

CT series pumps have an open impeller with a robust design, high efficiency and low Net Positive Suction Head required (NPSHr). CT series pumps with an open impeller are both easy to clean and suitable for pumping liquids containing solids.
Adapting the performance of CT pumps to specific operating points or ranges can be done by machining the impellers at constant speeds or by adjusting the pump speed with constant impeller diameters.

Semi-open impeller for Tapflo CT centrifugal pumps

Semi-open impeller

CT series pumps can be equipped with a semi-open impeller. Compared to the standard open impeller, the semi-open impeller provides more stable operation, lower noise levels, less vibration and a more robust design. The semi-open impeller is recommended when hard solids may be present in the pumped liquid.

Mechanical seal

Single mechanical seal

The mechanical seal spring is not in contact with the pumped liquid, which makes the internal pump chamber fully washable.

Single mechanical seal of Tapflo CTX centrifugal pumps
Casings available in Ra<1.6 μm

Wetted and external parts glass blasted to Ra<1.6 μm

Self-priming industrial centrifugal pumps Tapflo CTS I
Accessories
Flushed Seal

This option is similar to the lubricated seal option and is recommended when there is a potential risk of dry running, or when the product has a tendency to solidify or crystallize in contact with air. Additionally, the circulating flushing liquid removes heat from the mechanical seal.

Lubricated Seal

An excellent solution where there is a risk of short-term dry running and/or crystallization due to contact with air.

Lubricated seal for Tapflo CTI pumps
Trolleys for centrifugal pumps

Do you want to use one pump in multiple locations in your plant? Do you have technological processes scattered throughout the factory? We offer mobile solutions adapted to most Tapflo pumps. Thanks to the possibility of free transport of the pump, the use of the device is almost unlimited.

Pump trolleys are available in several sizes, as well as in hygienic and industrial versions:

Features and benefits:

  • industrial or hygienic design,
  • 3 sizes adapted to the pump used,
  • compact and durable stainless steel construction,
  • ATEX zone compliant.

Want to know more? Check out the product page for Tapflo pump trolleys

Industrial trolley for Tapflo centrifugal pumps - size S
Alternative centrifugal pumps
Self-priming hygienic centrifugal pumps | CTS H series

Designed for hygienic applications, including in the food, dairy, chemical and pharmaceutical industries.

Equipped with hygienic connections compliant with DIN 11851 as standard and mechanical seals and elastomers with FDA and EC 1935 approval. Wetted parts are electro-polished to Ra <0.8 μm as standard (Ra <0.5 μm on request) and external surfaces are glass-bead blasted to Ra <3.2 μm.

Want to know more? Check out the CTS H self-priming hygienic centrifugal pumps product page.

Samozasysające higieniczne pompy wirowe Tapflo CTS H
Vertical centrifugal pumps | CTV series

Thanks to

Want to know more? Check out the CTV vertical centrifugal pumps product page.

  • Technical data

  • Typical applications

  • Operation principle

  • Construction

  • Accessories

  • Alternative centrifugal pumps

Pump capacity: 54 m3/h (900 l/min)
Head: 40 m
Max. discharge pressure: CTS-C: 2.5 bar
CTS-D,E: 4 bar
Max size of solids:
6 mm
Temperature: 90 °C
Viscosity: 200 mPa·s
Casing material:
AISI 316L stainless steel
Impeller material: open, made of AISI 316L, optionally semi-open impeller
Mechanical seal: single: ceramic/graphite (standard), SiC/SiC or SiC/graphite, optionally with oil chamber or external flushing
O-rings: EPDM (standard), FKM, FEP/silicone or NBR
Electric motor: IP55, IEC flange B3/B14 (B3 for version with extended shaft). Available with ATEX Ex e or Ex d certificate. Other motors available on request.
Available sizes and connections:
Model
BSPT male thread (standard) BSPP (G) female thread
inlet outlet drain
CTS I C… 1 ½” 1 ½” ⅜”
CTS I D… 2 ½” 2″ ⅜”
CTS I E… 2 ½” 2″ ⅜”

Performance curves

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