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FlowFriend Pro
The FlowFriend Series:
- extremely energy efficient
- standard flow/speed control
- optional 0-10V control
- large flows at low energy consumption
- extremely quiet
- a highly efficient, new generation permanent magnet motor
- 3 different optimized pump housings, completely cast from RVS316
- Optimal tuning for versatile applicationsA premium-efficiency IE4 motor
- engine developed and produced in Germany
- Worldwide deployment: voltages ranging from 100-240V/50-60 Hz
Every FlowFriend model is standardly speed-adjustable (600-2550 rpm). A display is integrated into the pump for control, which also displays power output and operating hours. Each FlowFriend can also be controlled externally via an optional 0-10V input. The major advantage of permanent magnet motors over frequency-controlled asynchronous motors is their remarkably high efficiency at low speeds. However, they are also significantly more economical in the higher speed range.
Ingenious pump houses
A pump's hydraulics consist of the impeller and the pump housing. The FlowFriend's hydraulics are made entirely of cast 316 stainless steel. Robust, smooth, and perfectly shaped for minimal internal losses.
The hydraulics determine:
- to a large extent the total efficiency of the pump
- the suitability of the pump for a particular application.
FlowFriend HP
The HP features a pump housing with a more closed impeller, resulting in higher pressure. It is primarily designed for head heights of 4 mWC (0.4 bar) and above. However, the HP pumps up to 50 m³/h and has a maximum pressure of 14 mWC (1.4 bar).
The HP is ideal for applications such as sand filters and higher discharge heads. The HP is also an excellent choice for pipes with more bends and fittings, such as UV and heating. The HP has a 3" suction side and a 2.5" discharge side.
Engine and seal
The FlowFriend features a high-quality Eagle Burgmann shaft seal. The motor itself was developed and is manufactured by one of Germany's largest and leading electric motor manufacturers. The motor's efficiency ranges between 88 and 94%, depending on the speed.
Dry runner or wet runner
The FlowFriend is a dry-installed pump with a shaft seal (dry-running). This technology is superior in terms of energy and safety compared to so-called wet-running pumps (where the pump's armature rotates in the water). Therefore, pumps with a shaft seal are almost exclusively used in industrial applications. Because dry-running pumps have an extremely close spacing between the armature and stator, they have significantly lower energy losses during operation compared to wet-running pumps. Therefore, wet-running pumps always involve a compromise. If the distance between the stator and armature is very small, the risk of damage due to dirt trapped between the armature and stator is very high. However, as the distance increases, the pump's energy losses increase quadratically.
If the stator side of a wet-running motor is damaged, direct contact between the core (with voltages above 300V) and the water is possible. Therefore, a wet-running motor is not recommended for applications where people touch or swim in the water.
The pump's performance is best reflected in the pump graphs and specifications. The pump was tested at a test facility that complies with the following standard: NEN-EN-ISO 9906. The pump complies with European Directive 2009/125/EC (ecodesign requirements for water pumps).
