PROPELLER AERATORS with water conveyer

This propeller aerator was specially developed for intensive production of fish in tanks, raceways and ponds. The maintenance free, heavy duty, motor (230 or 380 Volt) with low power consumption (0,18-1,00 kw) has a mounted propeller which allows a high water circulation of up to 50-180 m3/h (splash height 60-90 cm and splash diameter 160-250 cm). It allows an oxygen transfer rate of up to 1.25 kg/kw/h or at an oxygen content of 6 mg O2/l at beginning approx. 0.4 kg/kw/h. The small float size (70 x 70 cm) as well as the compact and lightweight system (26-30 kg) make it fast and easy to install. As accessories a stainless steel protection basket (with 4 or 12 mm grating) is available, which save smaller fish for injuries.

The following types are available as standard:

AERATOR PUMPS with fountain spray pattern

This "Spray" aerator pump with 10-25 m cable is specially suitable for ponds and introduce a lot of oxygen into the water. If the self floating pump is connected with the spray nozzle it becomes an aerator with fountain spray pattern. If the supplied nozzle is changed to the supplied pipe adaptor it can be used as a floating pump for irrigation. The change of these two functions doesn't need any tool. They have a very reasonable price and are easy to install, either floating on the water surface or submerged to depth (with an anchor stone).

The following types are available:

RUBBER DIFFUSER with stainless steel frame

This professional, extremely durable and effective diffusers are suitable for the live fish transport and for emergency purposes with pure oxygen. The approx. 1000 pores/meter arranged in 6 rows, of the special oxygen hose open only if oxygen is supplied and close again if the supply stops. Thus, pore blockage is prevented and the diffuser is always ready to operate. An uniform bubble size due to the straight hose mounting in a stainless steel frame are main features of this professional diffusers. The sturdy hose connection has 6 mm diameter as standard (and is also available in 9 mm if preferred).
Other diffuser sizes and forms on request. For the self production of diffusers we deliver also just the diffuser hose per meter (18-19 mm inside and 24-27 mm outside diameter) as well as end pieces with connector and the pressure hose per meter (6 mm diameter).

The following sizes are available as standard:

CERAMIC PIPE DIFFUSERS for professional aeration

The fine pored ceramic tubes allow to diffuse the air in fine bubbles. The diffusers should be installed in the same depth, but as deep as possible below the water surface. The floating cross diffuser is placed on the water surface in the center of the tank or pond and fixed with a rope to the shore so that it can move a little and aerate a larger area.
The cross diffusers are available complete with 20 mm hose tail (other on request) and are delivered with or without float. The 1 m long feeding tube is also available shorter. Each diffuser tube has a length of 18 cm and a diameter of 6 cm and can introduce approx. 1.5 to 2.0 m3 air/hour each (6-8 m3 per cross diffuser).
They are also available as self sinking single tube diffusers with hose tail.

GAS DIFFUSERS with high performance

This is among the most robust and versatile fine bubble diffusers commercially available. The diffuser has the capacity to pass large quantities of air, oxygen or carbon dioxide with low pressure drop and small bubble size (approx. 1-4 mm). Fine bubble diffusion is inherently more effective than coarse bubble diffusers in providing a greater mixing action and aeration efficiency. The diffusers are of a tubular semi-flexible construction (32 mm in diameter). An outer polyester sleeve encases a silica particle ballast and an inner nylon distributor. The internal ballast is not fused together, therefore precipitates such as iron and carbonates tend to crack off, and can be flushed out easily. The internal ballast (weight approx. 1.5 kg/m) means that the diffuser does not need to be anchored to the floor of the tank. The unique design of the diffusers makes them largely resistant to biological and chemical fouling. The diffuser resolves many of the problems associated with other diffusers and has proven itself with over 10 years of use in many industrial and waste water treatment applications and it is the leading air diffuser for aquaculture. This gas diffuser is a hybrid air diffuser with the benefits of both tubular membrane and solid air diffusers, but with few of the disadvantages. The diffusers are sized (up to 3 m in length or longer with extension parts) according to the flow (m3/h) of air to be used. Length is approx. 33 cm per m3/h air or liter oxygen/min flow rate and pressure drop is approx. 200 mbar (<3 psi). All diffusers are supplied with 1/4" to 1/2" hose tails in acetyl plastic.

This simple membrane diaphragm compressors supply oil-free air and are perfectly suitable for live fish transports, where the required energy (12 V/DC) can be supplied by a battery i.e. from the car or truck. As accessories 6 mm hoses and various diffusers are available.

The following sizes are available as standard:

The design of these blowers is based on long experience in blower production. The motor (standard 380 Volt/50 Hz, 2850 RPM) is made for endurance and is offered in different power sizes. The flow capacity based on air at 981 mbar and 20 °C (at the inlet connection) ranges from 110-300 m3/h. Because of the small dimensions and compact construction, as well as the low noise level (45-48 dB), these blowers can be placed almost anywhere. The blowers can be installed singly, in parallel, or in rows for an increase in pressure. On request the blowers can be produced for us in seawater, or for other voltages and frequencies. Air filters, pressure valves and support stands are available as accessories.

This reliable and favorable blowers summarize modern know-how of pressure and vacuum generation, based on longtime experiences. The motor is constructed for endurance run is available in various power sizes. Concerning the compact dimensions and the low sound this blowers are easy and everywhere to install. Lateral channel blowers work regenerative. Casing and impeller with radial blades form a circular body. The medium (air) is accelerated by centrifugal force in the blade channels, stocked and compressed. This process continues permanently with continually increasing pressure rising until the medium leaves the casing through the outlet connection. Because of the special principle of construction and design, there is no contact between rotating parts. The machines are delivered as mono stage (M) or double stage (D) blowers with single (S) or twin (T) impeller. As accessories air filters, sound absorbers and security valves are available.

Types with the following performance data* are available as standard:

*Performance data at pressure operation 50 Hz (= 2900 RPM), for air at 20 °C, pressure 1013 mbar, tolerance +/- 10 %.

In recent years, fish farming has turned into high density farming practice and pure oxygen is essential in modern aquaculture. Several studies have shown adding dissolved oxygen into water on fish farms has a very positive effect on growth rates, feed conversion and mortality rates, all factors that will affect the profitability significantly. On-site oxygen generators allow an uninterrupted supply of gas with a high purity output (adjustable 85-95 %, outlet pressure 4 bar). This means that you can produce gas where and when you need it, and in the exact quantity and quality you need, to reach gas self-sufficiency and independence from external gas suppliers.  This oxygen generators are known as reliable, easy to use and low operational cost. They save energy and money as supply of oxygen cylinders or rent of liquid oxygen tanks becomes irrelevant. The average oxygen production cost are about 1,1 kwh per cubic meter of oxygen. An oxygen generator combined with cylinder gives the highest level of backup in comparison with cylinders it gives overall cost reduction up to 80 %. We use only high quality components and all systems are designed for 24 hours, 365 days a year’s operation. They are easy to operate and require minimum amount of maintenance and service.
This proved generators are based on the well-known PSA (Pressure Swing Adsorption) technology, using two pressurized columns with molecular sieves to ensure continuous production. Dry compressed air is blown through a valve to the vessel where the pressure is built to reach 5 to 10 bar. Nitrogen is tied to a molecular sieve during the building of pressure and oxygen is allowed to pass through to the accumulation tank. While pressure is built in vessel, the second remains without pressure. A part of the produced gas is used for regeneration of the molecular sieve. The entire PSA system can be subdivided into several components like: air compressor, air dryer, air tank, oxygen generator, oxygen tank and accessories. The models are available with a capacity in the range from under 1 to over 400 m3/hour (at an oxygen purity of 90 %). Oxygen cylinder filling stations are available on request.

The following models are available as standard:

The stated flows in m3/hour are for operation with reference to 15°C, 981 mbar, inlet pressure 7 bar, flow variance ±5%, oxygen purity 90 %, purity variance ±1%.
Conversion rates for oxygen: 1 m3 = 1,43 kg; 1 kg = 0,70 m3.
* incl. compressor, dryer and generator.