Mag Drive Centrifugal Pump

Materials Data & Limits

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

Tapflo’s Mag Drive Centrifugal Pump range is suitable for almost any application due to the wide flow and pressure ranges that these pumps can achieve.

Mag Drive Centrifugal Pump Capacity Range

Dimensions

Dimensions are in mm and based on standard build constructions. DWG & STEP Files are available upon request for integration into system build designs.

Mag Drive Centrifugal Pump Dimensions

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

Operating Principle of CTM Centrifugal Pumps

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.

CTM Mag Drive Centrifugal Pump Operating Principle

Industry	Example of application
Chemical stockists	Transfer of various chemicals from storage tanks to smaller containers
Surface treatment	Transfer, filtering and circulation of surface treatment baths
Food and beverage	Pumping of CIP detergent used for cleaning of pipes and other food process equipment
Water treatment	Dosing of acids and alkalis used as cleaning chemicals in Nano filtration
Chemical manufacture	Pumping of chemicals in industrial detergent equipment
Demineralizing	Demi-water circulation and transfer in many industrial applications
Photo processing	Transfer of photo develop chemicals and inclusion in processing machines
Liquid crystal manufacture	Pumping of concentrated acids and alkalis

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

What is a Mag Drive Centrifugal Pump?

Design Features & Benefits

Magnet Cage System