Sand / Media Filters - for Flow Rates Upto 90 m³/h Per Unit
Filtering with media filters is also recognized as depth filtration. The media filters perform the filtration of water through a thick layer of graded particles. These particles can be sand, gravel or other granular materials. The filtration rate depends on the effective size of the bedding and the water velocity through the filter. Amiad offers a complete line of manifolds, accessories and control systems for single or multiple media filters. The Amiad Customer Support Department is at your service in designing complete media filtration systems with gravel, sand, active carbon or multi-layer beddings: for manual or automatic operation, for single or multi-units, manifolded for complete filtration solutions.
How the Sand / Media Filters Work
Water enters through the filter inlet and percolates through the filter bed. When suspended matter comes in contact with media particles, it absorbs it. Clean water then goes via the filtration nozzles through the filter outlet. Cleaning is done by backwashing. Water is inserted in reverse direction - from the nozzles upwards, causing suspension of the filter bed, thus releasing the suspended matter from the bedding and it is flushed out through a backwash valve. Backwashing may be done automatically according to pressure differential and/or according to time.
Features Include
- Corrosive resistant: phosphate pre-treated, polyester coated steel
- Meets ISO 9003 standards
- Various connection types available to meet all international requirements
- All filters are rated to 10 bar.
- High efficiency: advanced designing allows perfect water distribution during filtering and backwashing
- Modularity and flexibility: wide range of vessel types and sizes allows suitability to many filtration applications
- Complete filtration solutions: Custom designed, manual or automatic backwash systems complete with manifolds, valves and control
- Suitable for various bed types: sand, gravel, active carbon, anthracite etc.
Fertigation
In the late 1970's, a new concept materialized to serve the international farming community: Fertigation. A natural step forward in agricultural technique, fertigation (from the words fertilizer and irrigation) is an effective method of applying chemicals and fertilizers to crops via the existing irrigation system. The need for fertigation derives from the fact that traditional methods of fertilization are only partially effective and leave a lot to be desired. At the time the fertilizer is distributed, it may be too strong for the delicate roots of the young saplings, causing then irreparable damage. Or on the other hand, it may be too weak, and thus useless. Most important however, is the fact that spread or sprayed fertilizer remains near the surface, hardly reaching the root tips and root hairs - the points of greatest absorption.
In the process of fertigation, fertilizer is applied directly with the irrigation water. Therefore, wherever the water goes, the fertilizer goes with it. Fertilizer is applied only where needed, and in the proper quantities.
The obvious advantages of fertigation, therefore, are the saving of labor and machinery, and the efficient use of the costly chemicals and fertilizers to be applied. In fertigation, the extra activities involved in the separate application of fertilizer are no longer necessary; neither is the purchase of maintenance of dedicated equipment for fertilizer distribution. Additionally, such machinery often compresses the soil and may cause crop damage. In conclusion, one might say that fertigation is the most effective and least expensive way of proving nutrients to growing field crops.
Fertilizer Injector Units 4-01 and 4-02
The Amiad Fertilizer and Chemical Injector units 4-01 and 4-02 require no external power supply. Their linear hydraulic motor is powered by the hydraulic pressure of the irrigation system. The units are supplied with all the necessary pipes, fittings and accessories for immediate operation. Control: The maximum injection rate of the pump is proportional to the pressure in the main line, thus the required injection rate is easily adjusted by throttling the injection line. Each pulse injects 1/30 liters of chemicals - the liters of fertilizer injected per hour = twice the number of pulses per minute.
Amiad TMB Injector Unit
The Amiad TMB fertilizer pumps evenly distribute the fertilizers throughout your irrigation system - over the whole area of the field. The pumps inject the fertilizer solution in to the irrigation system where it is mixed with the flowing water. When sprayed through the sprinklers or drippers, the fertilizer will uniformly reach the roots of all plants being irrigated. The Amiad TMB fertilizer pumps are driven solely by the water picked up from the irrigation line itself and can be operated anywhere in the field as long as water pressure exceeds the minimum requirements per unit.
