New Mono CMS261 (C1241URRS/G) – Direct Replacement for Mono CMS261 (CMS261)
The updated Mono CMS261 is designed as a straightforward replacement for the original CMS261, helping simplify upgrades where an existing unit needs to be exchanged with minimal disruption. This revised version is supplied with a metric IEC motor featuring a standard shaft for easier future replacement and wider availability.
As part of this update, the unit now benefits from an increased motor power rating of 0.25kW. It is also supplied with an adaptor kit that allows the pump to replace the original model without requiring alterations to existing fixing holes or connected pipework, making installation faster and more convenient.
The Mono M range is a series of compact progressive cavity self-priming pumps built for dependable operation across a broad range of duties. Manufactured by Mono, these pumps are designed to provide efficient performance in a space-saving format, with even the larger models in the range requiring relatively little installation space and only modest clearance for servicing and routine maintenance.
Constructed for reliability in tough applications, the Mono M range is well suited to handling viscous liquids and fluids containing suspended or random solids. This is supported by an abrasion- and chemical-resistant stator, a precision-engineered stainless steel rotor, a mechanically sealed drive shaft, and a robust cast iron pump body built for long service life.
The progressing cavity pumping principle delivers a smooth and controlled transfer of liquid. As the helical rotor turns within the stator, cavities are formed and move progressively from suction to discharge, carrying the pumped medium evenly through the pump. This operating method helps maintain a steady outlet pressure and a non-pulsing flow, which is particularly valuable in applications where consistent delivery is important, such as heating oil transfer to burner nozzles.
Fully self-priming by design, the Mono M range can achieve suction lifts of up to 8 metres (26ft). This allows the pump to be installed above the liquid source, giving greater flexibility for accessible mounting and easier maintenance access. The smooth pumping action, combined with the resilient rubber stator, also helps ensure quiet operation, making the range suitable for both domestic and industrial environments where low running noise is preferred.
Maintenance is intentionally straightforward thanks to the pump's simple engineering and service-friendly layout. Routine dismantling and upkeep can typically be carried out quickly without the need for specialist tools or complex procedures, helping reduce downtime and ongoing maintenance effort.
Typical Applications of the Mono M Range include:
- Cellar and basement drainage
- Septic tank and cesspit emptying
- Garden irrigation and sprinkler systems
- Water abstraction and sampling from wells, streams and rivers
- Diesel transfer
- Water-based ink circulation
- Vegetable oil pumping
- Handling of non-aggressive chemicals
The Mono CMS261 is a practical choice where a compact, self-priming progressive cavity pump is required for drainage, irrigation, water supply, diesel transfer, or light-duty fluid handling applications. With its updated motor specification and direct replacement adaptor kit, it offers an efficient route to replacing older installed pumps while preserving existing pipework and mounting arrangements.
Voltage for this item is 110V. It has an actual flow rate of 12.5 Ltr/min. The maximum head for this pump is Self-priming up to 8m. This is a Surface Mounted pump which can be suitable when the pump can sit in a dry, accessible location and draw liquid in via a suction pipe or hose.
The operating pressure of this is 3.45 bar.
Real-world product applications
- Pumping viscous liquids and sludge-like media
- Handling fluids with suspended solids or delicate media
- Supporting dosing or metered transfer in process systems
- Transferring thick or thin fluids between tanks or stages
- General industrial fluid handling where steady flow is needed
Key Product Features
- Operating pressure: 3.45 Bar.
- Flow rate: 12.5 Ltr/min
- Voltage: 110V
- Maximum head: Self-priming up to 8m
Mono Pumps (est. 1935) is a UK manufacturer specialising in progressing cavity pumps and maceration/grinding solutions. Their ranges are used for wastewater and sludge transfer, viscous fluid handling, food and beverage processing and industrial applications where accurate, reliable pumping of solids-laden or shear-sensitive fluids are required.
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