Description
The DQA 25/60 Circulator Pump is a modern variable-speed circulation pump engineered for hot water circulation in heating, cooling, and solar thermal systems. Designed with advanced inverter technology and a high-efficiency permanent-magnet motor, this pump automatically adapts to system demand—delivering optimal performance with minimal energy consumption.
Manufactured to the high standards associated with Dayliff, the DQA 25/60 is an excellent upgrade from traditional fixed-speed circulator pumps.
Product Overview
| Feature | Description |
| Pump Type | Variable-speed circulator pump |
| Control Technology | Inverter-controlled permanent-magnet motor |
| Operation Modes | Constant curve, proportional pressure, constant pressure |
| Control | Fully automatic with manual speed selection |
| Display | Power consumption, alarms & warnings |
| Installation | Inline circulation (horizontal shaft) |
Intelligent Variable-Speed Operation
The DQA 25/60 uses advanced inverter technology to continuously match pump output to real system demand, ensuring maximum efficiency and comfort.
| Control Mode | Benefit |
| Constant Curve | Stable performance for fixed systems |
| Proportional Pressure | Pressure adjusts automatically to demand |
| Constant Pressure | Maintains steady pressure regardless of flow |
| Automatic Mode | Optimises energy use at all times |
| 3 Selectable Speeds | Fine-tune performance to system size |
Motor & Electrical Specifications
| Parameter | Specification |
| Motor Type | Synchronous permanent-magnet (inverter controlled) |
| Voltage | 1 × 240 V |
| Insulation Class | F |
| Enclosure Class | IP42 |
| Protection | Connection via suitable MCB or fuse |
This motor design delivers very low power consumption, quiet operation, and extended service life.
Construction & Materials
| Component | Material |
| Pump Housing | Cast iron |
| Rotor Can | Stainless steel |
| Impeller | Composite plastic |
| Connections | BSP union fittings (supplied) |
The robust construction ensures reliability in continuous hot water circulation applications.
Operating Conditions
| Condition | Range |
| Pumped Liquid | Clean, non-aggressive liquids |
| Liquid Temperature | −10°C to 110°C |
| Max Ambient Temperature | 10°C – 50°C |
| Max Operating Pressure | 6 bar |
| Installation Orientation | Horizontal shaft, vertical flow |
Pump Data & Dimensions
| Model | Power Range (kW) | Inlet / Outlet | Length (mm) | Height (mm) | Width (mm) | Weight (kg) |
| DQA 25/60 | 0.005 – 0.045 | 1″ | 180 | 128 | 130 | ~3 |
Typical Applications
| Application Area | Use Case |
| Heating Systems | Domestic & commercial hot water circulation |
| Solar Thermal | Solar water heater circulation |
| Cooling Systems | Chilled water circulation |
| Underfloor Heating | Stable and efficient water flow |
| Buildings | Apartments, homes, offices |
