Davey's CM End Suction Pump
Key features:
- Standard automatic pressure system type.
- Suitable for water supply, industry, environmental, building services & pumping liquids.
– For commercial irrigation, booster stations, municipal water supply, flood irrigation, general transfer, cooling tower transfer, refrigeration systems, commercial fountains, condensate recovery, dairy wash down, mining & quarry applications, fume scrubbers for odour control, water treatment transfer & filtration, circulating large aquatic centres, backwash filtration in commercial pools, water features, commercial heating, air conditioning systems, commercial building pressure boosting & fire service applications. - 12 months warranty for pump, motor.
- Fixed pressure setting on every usage.
- Easy installation, no setting required.
Classified As:
Overview of Davey's CM End Suction Pump
The CM series motor pump ISO end suction pump is a high-performance centrifugal pump designed for industrial and building services water handling. It is supplied as a fully integrated motor and pump assembly, ready for direct installation in industrial pipelines, water supply systems, irrigation networks, and municipal water circulation. Designed according to ISO dimensional standards, the CM series provides consistent hydraulic performance, allowing compatibility with other ISO standard pump systems.
The pump is engineered to handle clean, low-viscosity, non-combustible liquids, making it ideal for applications such as industrial water transfer, chiller loop, commercial swimming pools, laboratory circulation systems, and general fluid transport in industrial and commercial facilities. The CM pump offers reliable operation in continuous duty environments, where stable flow, pressure, and mechanical integrity are critical.
Davey's CM End Suction Pump Variations
CM models are distinguished by their ISO series designation, which indicates:
- Motor configuration (integrated motor pump unit)
- Suction and discharge flange size
- Impeller diameter and hydraulic duty point
- Material of construction (cast iron, bronze, or stainless-steel options)
Close coupled CM units are supplied as complete motor pump assemblies, whereas frame-mounted units are less common but allow for larger motors and custom system integration. These codes allow engineers to quickly identify the pump’s performance capability and compatibility with existing pipelines.
Method of Identification
This identification system ensures the pump matches the required hydraulic performance and installation requirements.
It also facilitates spare parts selection, maintenance, system documentation.
Certification
The CM series is manufactured in compliance with ISO dimensional standards.
Electrical components and mechanical construction meet industrial safety and quality standards to ensure reliability in continuous duty operation.
Compliance with ISO ensures the pump can be installed as part of larger engineered systems with confidence in performance, safety, and interchangeability.
TEFC Motor
The CM series is powered by an integrated TEFC (Totally Enclosed Fan Cooled) electric motor, designed to provide reliable and continuous operation in industrial water handling and circulation systems.
The motor is mounted directly to the pump via a robust IEC-standard adaptor housing, ensuring precise alignment and reducing vibration.
. It is typically rated for 380, 415 V, 50 Hz three-phase supply, with full load current and power matched to the pump’s hydraulic requirements.
The motor features IP55 protection against dust and moisture, Class F insulation, and Class B temperature rise, providing durability in demanding industrial environments. Its construction allows for easy maintenance and ensures long-term operational reliability when integrated into pipelines, pump stations, or HVAC circulation loops.
Motor Adaptor Housing
The motor adaptor housing connects the pump casing to the integrated motor.
It provides structural support, ensures precise alignment between the motor and pump shaft, and allows for the standardized IEC motor frame installation.
This design ensures vibration-free operation and reliable mechanical performance over the pump’s lifespan.
Suction Inlet
The pump inlet is designed to provide smooth, laminar flow into the impeller, minimizing turbulence and reducing the risk of cavitation.
Suction flange dimensions follow ISO standards, and proper piping design is essential to maintain Net Positive Suction Head (NPSHr) and maximize hydraulic efficiency.
Volute
The volute functions as a hydraulic energy conversion chamber in centrifugal pump systems.
Fluid exiting the impeller possesses significant kinetic energy due to rotational motion and centrifugal action.
The volute’s expanding spiral geometry slows the flow in a controlled manner, transforming velocity head into pressure head.
However, at off-design flow conditions, uneven pressure distribution within a single volute can generate radial thrust on the shaft, potentially affecting bearing life and mechanical stability.
To minimize this hydraulic imbalance, double-volute designs are often used in higher-capacity pumps.
Impeller & Diffuser
The CM series uses closed impellers, typically made of bronze, which provide high efficiency for clean water and industrial liquid transfer.
Closed impellers offer stable pressure generation, reduce hydraulic losses, and allow for more precise trimming to achieve the desired flow and head performance.
Back Pull-Out Design
The back pill-out design allows the rotating assembly, including the impeller, disturbing the suction or discharge connections.
This feature simplifies maintenance, reduces system downtime, and allows inspections, repairs, or replacements to be performed efficiently.
Backplate & Mechanical Seal
The backplate houses the mechanical seal, which prevents fluid leakage along the shaft while maintaining internal pressure.
The CM series uses a single mechanical seal, typically carbon vs ceramic, with optional material upgrades for higher temperature or aggressive fluid applications.
The back pull-out design allows maintenance of the rotating assembly without disconnecting suction or discharge piping.
O-Ring & Spacers
O-rings seal the casing joints and mechanical seal housing to prevent fluid leakage.
Spacers are used to maintain proper impeller clearance and shaft alignment, ensuring hydraulic efficiency and mechanical reliability.
These components are integral to safe and stable pump operation.
Operating Limits
| Operating Limits | CM Series |
| Maximum flow | 375m3 /hr |
| Maximum total heads | 160m |
| Liquid temperature* | -15 to 140°C |
| Operating pressure (Casing) | 16 Bar |
* With optional high temperature seal.
Materials of Construction
| Materials of Construction | |||
| Body | Impeller | Shaft | |
| B Suffix | Cast Iron | Bronze | Stainless Steel 316 |
| J Suffix | Cast Iron | Stainless Steel 316 | Stainless Steel 316 |
| JJ Suffix | Stainless Steel 316 | Stainless Steel 316 | Stainless Steel 316 |
Hydraulic Performance
Included In The Box
CM End Suction Pump
User Manual
Proof of Purchase
12 Months of Manufacturer Warranty
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