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Speak to our Experts: 02380 252 325
Tapflo’s CTM Mag Drive Centrifugal Pump is ideal for handling low and normal viscous liquids. The magnetic seal design ensures there are no leaks for a reliable design with fewer parts.
Design Features & BenefitsThe CTM Mag Drive Centrifugal Pump is a close-coupled compact pump ideal for service in little spaces like in OEM installations. Benefits include:
The wetted components are non-metallic injection moulded thermoplastics enabling excellent corrosion resistance.
The magnets are totally encapsulated in their cage with a unique system that avoids the use of resins and glue. This grants a safe system with better performance at high temperatures. Furthermore, the impeller is injection moulded, resulting in excellent performance and no weak points.
This pump is also available as part of our CTM-IBC portable system.
| Casing & Isolation Shell | PP-GF (30%) or PVDF |
| Impeller | PP or PVDF |
| Lantern (Not Wetted) | PP-GF (30%) |
| Static Bushings | Ceramic (Std.) or SiC |
| Rotating Bushings | PTFE-Graphite (Std.) or SiC |
| O-Rings | FKM, EPDM, FFKM, FEP / Silicon |
| Magnets | NdFeB |
| Motor | IEC standard, 3×400 VAC (other on request), 2900 rpm, IP55, B34 frame, IE3 |
| Pressure Ratings | CTM20: PP pumps: PN4 at 20°C, PN2 at 70°C PVDF pumps: PN4 at 20°C, PN2 at 80°C CTM25, CTM32, CTM40 and CTM50: PP pumps: PN6 at 20°C; PN2 at 70°C PVDF pumps: PN6 at 20°C; PN2 at 90°C |
| Temperature Ranges | PP Pumps: 0-70ºC PVDF Pumps: 0-80ºC (CTM 20) / 0-90ºC (CTM25 – 50) |
| Kinematic Viscosity | 200 cSt (max) |
| Dynamic Viscosity | 10 cP (max) |
Capacity Range
The CTM Mag Drive Centrifugal Pumps are capable of a wide range flow and pressures to suit most applications. The capacity overview is below.
Dimensions are in mm and based on standard build constructions. DWG & STEP Files are available upon request for integration into system build designs.
| Model | CTM 20-7 | CTM 25-8 | CTM 25-10 | CTM 32-12.5 | CTM 40-12.5 | CTM 50-12.5 | ||||
| A | 70 | 90 | 100 | 105 | 105 | 110 | ||||
| B | 48 | 58.5 | 63 | 56 | 56.5 | 54 | ||||
| C | 93.5 | 100.5 | 136.5 | 164 | 165 | 189 | ||||
| ØE | 15 | 18 | 18 | 15 | 23 | 30.8 | ||||
| øF | 15 | 18 | 18 | 23 | 30.5 | 42 | ||||
| G | ¾” | 1” | 1” | 1¼” | 1½” | 2” | ||||
| H | ¾” | 1” | 1” | 1” | 1¼” | 1½” | ||||
| L | 248.5 | 279 | 334.5 | 374.5 | 402.5 | 446 | 453 | |||
| M | 36 | 40 | 45 | 54.5 | 56 | 63 | 70 | |||
| N* | 71 | 80 | 80 | 100 | 125 | 140 | ||||
| P* | 9 | 10 | 10 | 13 | 14 | 15 | ||||
| Q | 56 | 63 | 71 | 80 | 90 | 100 | 112 | |||
| R | 35 | 39.5 | 43.5 | 58.5 | 58.5 | 52 | ||||
| S* | 90 | 100 | 112 | 125 | 140 | 160 | 190 | |||
| T | 112 | 126 | 141 | 160 | 170 | 200 | 230 | |||
| U* | 5.5 | 7 | 7 | 10 | 10 | 12 | ||||
| Motor | ||||||||||
| Power, kW | 0.12 | 0.25 | 0.55 | 0.75 | 0.75 | 1.1 | 1.5 | 2.2 | 3.0 | 4.0 |
| Frame Size | 56 | 63 | 71 | 80 | 90 | 100 | 112 | |||
| Weight, Kg (PP) | 4.3 | 5.7 | 8.75 | 9 | 11.7 | 15.7 | 24 | 25.5 | 31.55 | – |
| Weight, Kg (PVDF) | 4.45 | 5.9 | 9.2 | 9.4 | 12.2 | 16.2 | 24.65 | 26.2 | 32.15 | – |
| Optional Connections | ||||||||||
| Flanged | – | DN25 | DN25 | DN32 / DN25 | DN40 / DN32 | DN50 / DN40 | ||||
| Hose Tails | – | Ø25 | Ø25 | Ø32 / 25 | Ø40 / 32 | Ø50 / 40 | ||||
| Optional Connections | ||||||||||
| Flanged | – | DN25 | DN25 | DN32 / DN25 | DN40 / DN32 | DN50 / DN40 | ||||
| Hose Tails | – | Ø25 | Ø25 | Ø32 / 25 | Ø40 / 32 | Ø50 / 40 | ||||
In order to start the pump, the casing has to be filled with liquid before start-up and have a positive suction head to operate efficiently. The NPSHr (Net Positive Suction Head Required) can be provided during the selection and assessment of the pump for your intended application.
Upon start-up, the liquid enters the pump casing axially onto the eye of the impeller. The rotating impeller generates a centrifugal force accelerating the liquid through the pump casing and into the discharge piping. As the fluid is accelerated by the impeller and thrown towards the discharge outlet a low-pressure point is generated at the eye of the impeller effectively drawing fluid from the suction side to the pump and continuing the pumping cycle.
Unlike standard close-coupled centrifugal pumps where the impeller is connected to the motor shaft directly, in a CTM Magnetically Driven Centrifugal Pump, the torque from the motor shaft is transmitted to the impeller by means of a magnetic coupling. The drive magnet is fixed on the motor shaft. The magnets installed in the drive magnet and in the impeller/magnet assemblies have different polarities.
When the pump is at rest, the magnets of both parts are aligned. When the motor is started and the drive magnet starts to rotate, the magnets create an attraction and repulsion force thus forcing the impeller to rotate. If the impeller gets blocked or the pumped liquid will be too dense and too much torque will be generated on the motor shaft, the magnet will de-couple and no damaged will be done to the motor. When the pump will come to a stop, the magnets will re-couple. Between both magnet assemblies, there is an isolation shell that separates the liquid side from the motor side and from entering the atmosphere.
BSPT M (Standard) Flanged to DIN2633 (PN 10/16) Hose Tails
MOTOR OPTIONS
The CTM units are fitted with Safe Area IP55 Motors in Aluminium Casings as standard and are in line with all current Energy Efficiency Class legislation. Motor Powers vary from 0.12 kW up to 4 kW in standard IEC frame sizes in both 50 & 60 Hz and Single or 3 Phase. S1 Duty Class is standard. 2 & 4 Pole are supplied as standard options however 6 Pole (1000 rpm) & 8 Pole (800 rpm) as well as 2 Speed can be provided upon request as well. Cast Iron Casings can be supplied upon request to provide a more robust casing material for external applications or particularly arduous environments. Special Voltages are also available upon request, 110V & 500V for example. PTC Thermistors can also be supplied upon request when motors are to be controlled by variable frequency drives and to monitor motor temperature rises.
We recommend not exceeding the following loads & forces to ensure safe operation of the pump.
| CTM 20 | ||
| Direction | Load | Moment of Force (Nm) |
| X | 15 | 3 |
| Y | 20 | 4 |
| Z | 15 | 3 |
| CTM 25 | ||
| Direction | Load (N) | Moment of Force (Nm) |
| X | 15 | 3 |
| Y | 20 | 4 |
| Z | 15 | 3 |
| CTM 32 | ||
| Direction | Load (N) | Moment of Force (Nm) |
| X | 15 | 3 |
| Y | 20 | 4 |
| Z | 15 | 3 |
| CTM 40 | ||
| Direction | Load (N) | Moment of Force (Nm) |
| X | 15 | 3 |
| Y | 20 | 4 |
| Z | 15 | 3 |
| CTM 50 | ||
| Direction | Load (N) | Moment of Force (Nm) |
| X | 15 | 3 |
| Y | 20 | 4 |
| Z | 15 | 3 |
Here at Tapflo UK, our sales team can provide you with all the necessary information about our Centrifugal range to suit your application. Get in touch today to find out more.
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Tapflo Group is an independent, family-owned, European manufacturer and global supplier of Industrial Pumps that has been operating for 40 years.
We are a leading manufacturer of Air Operated Diaphragm Pumps, Centrifugal Pumps and other industrial process equipment, operating across 75 countries.
Tapflo UK has been operating since 1998, now working nationally with end-users and pump distributors. We offer a wide pump portfolio to the UK for almost any application and installation, including bespoke pumping systems designed by our in-house Engineering Team.
