GRUNDFOS MTRE Variable-Speed Immersible Centrifugal Pump
Product Overview
The GRUNDFOS MTRE series consists of variable-speed immersible centrifugal pumps specifically designed for machine tool applications, featuring high energy efficiency, precise control, and a modular design. Equipped with an integrated variable frequency drive, this series is suitable for applications with fluctuating flow and pressure requirements.
Key Features and Functions
1. Variable Frequency Control Technology
- Built-in VFD: MTRE pumps feature an E-motor with an integrated variable frequency drive, enabling continuously variable motor speed control.
- Energy Efficiency: Adjusts speed via frequency control to match actual demand, significantly reducing energy consumption.
- Precise Control: Allows the pump to operate at any specific duty point to meet the requirements of various machining processes.
- ErP Directive Compliant: Optimized for energy efficiency; meets the ecodesign requirements of the EU ErP Directive (Commission Regulation (EC) No 547/2012).
2. Application Advantages
- Machine Tool Compatibility: Ideally suited for machining centers utilizing diverse processes and tooling.
- Heat Input Control: Reduces heat input from cooling lubricants, enhancing cooling efficiency.
- System Integration: Easily integrates into machining centers to boost overall system performance.
- Multiple Control Modes: Supports various control modes, including constant pressure, constant differential pressure, constant temperature, and constant flow.
3. Performance Characteristics
- Wide Performance Range: MTRE 1s, 1, 3, and 5 models can operate beyond the standard 100% curve, with performance extended via optimization software.
- High Efficiency: Peak efficiency reaches up to 80%; select models feature an MEI (Minimum Efficiency Index) ≥ 0.70.
- Broad Pressure Range: Standard models offer a maximum head of 36 meters, while high-pressure models (HS series) deliver pressures up to 38 bar.
4. Structural Design
- Modular Design: Comprises motor and pump units, available in various sizes and stage configurations.
- Material Options:
Standard Series (Type A): Wetted parts made of cast iron and stainless steel.
Stainless Steel Version (Type I): All wetted parts made of EN/DIN 1.4301 (or higher grade) stainless steel. - Flexible Installation: Supports both vertical and horizontal installation (depending on the model).
5. Intelligent Features
- Multiple Control Platforms: Controllable via the pump's onboard control panel, Grundfos GO, etc. Control and monitoring via Link or a central management system
- Communication interface: Optional CIM communication interface module available for data communication with building management systems
- Safety function: Equipped with Safe Torque Off (STO) functionality, compliant with the EN 61800-5-2 standard
6. Reliability and maintenance
- Shaft seal system: Uses HUUV/HUUE type shaft seals (tungsten carbide/tungsten carbide); temperature range: -10 to +90°C
- Motor protection: Built-in thermal protection to prevent slow-speed overload and stalling
- Easy maintenance: Modular design facilitates maintenance and component replacement
Typical application areas
- Machine tool cooling systems
- Cooling for machining processes such as boring, milling, and grinding
- EDM (Electrical Discharge Machining) cooling
- Filtration systems
- Condensate systems
- Component cleaning systems
Technical specification examples
- Flow rate range: 0.3–1417 l/min (depending on model)
- Power range: 0.37–26 kW
- Temperature range: -10°C to +90°C (standard models); up to 120°C for special models
- Enclosure class: IP55 (motor)
- Insulation class: Class F
Through variable frequency technology and intelligent control functions, the MTRE series pump provides users with an efficient, energy-saving, and flexible liquid transfer solution, making it particularly suitable for industrial applications requiring precise flow and pressure control.