Two - Stage Centrifugal Pumps - 2CMH

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Working Principle

The 2CMH series consists of CENTRIFUGAL PUMPS with two BACK-TO-BACK IMPELLERS, working in series. The first impeller directly faces the suction opening machined in suction body. The second impeller is housed back-to-back to the first in the delivery body. The shape of the impellers transmits a radial motion to the fluid from of pressure and an increase in speed. After leaving the first impeller the fluid passes to the volute in the suction body connected to the second impeller suction chamber where it receives an equal energy increase. After leaving the second impeller the fluid enters the volute of the delivery body and the tapered diffuser which transform part of the kinetic into pressure energy. The axial hydraulic thrusts are perfectly balanced by the back-to-back installation of the two impellers on the same shaft, thus avoiding any overload on the motor bearings.

Performance Range

Flow rate up to 180 l/min (10.4m3/h)
Dynamic head up to 65m

Technical Data

- TEFC 2 pole motor
- Insulation Class F
- Protection degree IP54/IP55
- 1-230 V+/-10% 50HZ, 3-230/400V+/-10% 50HZ
- Permanent split capacitor and automatic thermal overload for single phase version
- Thermal protection to be provided by the user for three phase version

Operating Limits

- Suction life up to 7m
- Fluid temperature up to +60ºC
- Maximum ambient temperature +40ºC


- Casing in CI/Impeller in/Bronze, Stainless steel (optional)
- Shaft in SS 303
- Mechanical seal in Carbon/Ceramic/NBR closed and externally    ventilated, suitable for continuous duty.
- Insulation class FB (up to 0.75kw)