Up to 80% of a blower’s life cycle cost is consumed by its energy usage. Energy-efficient technologies such as our ZS screw blower solutions ensure you low operational costs. We can offer you fixed speed, VSD and VSD⁺ units. Our multi-tier offer allows us to always offer you the most energy-efficient units for your needs.
The most energy-efficient solution
Our triple ZS offer: ZS L (VSD), ZS (VSD) & VSD⁺
Our ZS L & ZS L VSD units (our base offer) are our most cost-efficient screw blowers. At a competitive price range, they are a great and more sustainable alternative for your existing lobe blowers. On top of that, you’ll also see a reduction in service costs: with the long lifetime of the element and without any belts and pulleys to worry about, only a minimum level of service is required.
An even more energy-efficient solution is to opt for a ZS (fixed speed) or ZS VSD. Our compact ZS & ZS VSD screw blowers have a pressure range up to 1.5 bar(g)/21 psig. Our ZS units are perfectly suited for processes with constant air demand, while our ZS VSD units have the ability to tune their motor speed and thus airflow delivery rate towards the requested set point. No energy is lost in compressing an excess of air. On top of that, the units have the highest available turndown range on the market.
If you want to save even more on energy, we can offer you our premium ZS VSD⁺ units. Our ZS VSD⁺ with a.o. the ultra-premium permanent magnet motor is a highly efficient solution that can help you cut even more operational costs.
Energy savings with ZS screw blower element
The ZS range has one of the most energy-efficient screw blower elements. The screw blower elements have optimized screw profiles and in- and outlet ports. This results in an efficient internal compression, together with the high-efficiency bearings and gears which can help you save up to 40% on energy consumption compared to lobe technology.
The bearings of our oil-free screw blower elements are lubricated by cool oil. The cool oil is injected through tuned oil nozzles and forced by a mechanically driven oil pump. That assures just the right amount of cool oil at any rotational speed, which supports a very wide turndown capacity.
Even more energy savings with Variable Speed Drive technology
Processes with a variable air demand can benefit from having a Variable Speed Drive unit. Having a VSD unit can lead to major energy savings whilst it also protects the environment for future generations. Thanks to continual investments in this technology, we can offer you the widest range of integrated VSD blowers on the market.
Our ZS range is equipped with a Neos variable speed drive. Don’t waste energy by choosing your required flow delivery: not only did we make the frequency drive more reliable, it also works at an optimal efficiency level.
Efficient transmission
A high-efficiency gear drive ensures minimal drive loss and an optimum speed selection for all pressure ranges. The gear transmission allows a high range of minimum and maximum motor speed, resulting in a very wide turndown range. To optimize that turndown, multiple gear sets are available for the different pressure variants. This will allow you to get the full ability of capacity of the blower element. The highly efficient gears ensure there will be no misalignment over time so no loss of efficiency. This results in 5% fewer losses compared to belt-driven units such as lobe blowers.
Minimized pressure drops
Friction is created when the air can’t flow smoothly towards the element. This can cause pressure drops that can create a loss of efficiency. In fact, all losses before the element decrease the efficiency of the unit as the element needs to make up for these losses. It is thus crucial to avoid these pressure drops and maintain efficiency. Pressure drops in the air path are minimized because of the smart engineered baffling system and the high-quality air inlet filter. By measuring the pressure drop in the inlet system, the integrated controller (Elektronikon) can detect when the air filter is too contaminated. The Elektronikon will let you know when service on the filter is required so that your unit can keep running in optimal condition.
Highly efficient motors
ZS units are equipped with the most efficient motors in the market. Our ZS VSD⁺ are equipped with a permanent magnet motor. This helps you achieve an overall higher energy-efficiency level as no energy is lost in creating the secondary magnetic field. It also has a constant power factor, keeping motor efficiency constant throughout the whole motor speed range. That brings energy efficiency gains over the full turndown range of the ZS VSD⁺ unit! On top of that, the motor runs on oil-lubricated bearings, allowing also the motor to run at a maximum speed window. The permanent magnet motors are IE5 and NEMA ultra-premium efficiency classified. This not only helps you reduce your operational costs but also ensures you’re equipment is in line with the latest energy consumption guidelines and regulations. The induction motors of the variable speed and fixed speed models are classified up to IE4 and NEMA super premium efficiency.
