For more than 40 years, Amiad has been a leader in the development and skillful manufacturing of highly efficient, clean technology filtration systems. From 3/4" manual filters for landscaping applications to huge parallel arrays of automatic self-cleaning filters for industrial or municipal systems, Amiad technology has built a worldwide reputation for efficiency, effectiveness and reliability.

The cornerstone of Amiad's filtration technology is our suction-scanning technology. Highly efficient and chemical-free, this design breakthrough allows us several advantages:

• Fast, complete cleaning of the entire screen area
• Uninterrupted flow during cleaning
• Minimal energy and back flush water volume needed

Focused back-flushing - Complete cleaning of the screen surface
Figure 1A. Focused back-flush	Figure 1B. Conventional back-flush	Suction-scanning technology makes elegant use of simple physics. As the filter screen captures particles, the pressure differential between the inside surface (the inlet side) and the outside surface (the outlet side) of the screen increases. When that pressure differential reaches 7 psi, the Amiad system opens an exhaust valve. The exhaust valve drains the suction scanner, a hollow 316 stainless steel tube tipped with nozzles just millimeters from the screen surface.

Figure 2. Illustration of suction-scanner and nozzles

Opening the exhaust valve to the unpressurized outside environment causes water to flow in a high-velocity stream backwards across the screen into the nozzles, carrying the captured particles, or filter cake, with it. The nozzles concentrate the suction effect on less than one square inch of screen at a time, creating a powerful and highly effective cleaning force - a phenomenon we call "focused back flushing." The suction scanner travels down the screen in a spiral pattern at a fixed speed, cleaning 100% of the screen surface in a 25-to-40-second stroke.

Uninterrupted flow with minimal waste

The suction-scanning cleaning cycle can be initiated by a pressure-differential switch or by a timer. The spiral motion of the scanners may be powered by a motor (as in our SAF, ABF and EBS systems), by hydraulic flow (as in our Filtomat M100 and M300 Series) or by hand. Because the suction-scanning technology uses a very small amount of water - less than 1% of the flow in most cases - the entire cleaning process can take place without interrupting system flow. And because there are no chemicals, polymers, or filter aids to be flushed with the filter cake, suction-scanning technology is truly clean technology.

For water with high loads of organic particles or other deformable particulates, disk filtration can be a highly effective solution. Disks with fine grooves on both sides are tightly stacked around an open core. As particles travel towards the core, the outside surface and grooved channels capture them. To clean the filter, the core expands, allowing flush water to clean the grooves before the assembly is recompressed.

Amiad offers automatic self-cleaning disk filtration systems that offer large surface area at filtration levels down to 100 microns.

For ultra-fine filtration - down to 2 microns - Amiad offers automatic self-cleaning microfiber filtration systems. Wound around a rigid cassette with a specially grooved base plate, densely placed polyester threads capture tiny particles as water flows across them toward collector pipes.

As dirt builds up on the filter threads, the pressure differential between inlet and outlet sides of the stream increases. At a pre-set pressure differential, a high-velocity cleaning stream is directed through the threads. The stream bounces off of the specially grooved base plate, pushing the high-velocity water back through the threads and taking the particles with it to a drain valve.

Amiad automatic self-cleaning microfiber filtration systems are excellent for drinking water filtration - including the removal of Cryptosporidium, Giardia cysts and Legionella - as well as cooling tower side stream filtration, swimming pool filtration, and protecting reverse osmosis systems.

Amiad offers a variety of manual and semi-automatic filtration systems for landscape, irrigation and industrial use.

Grooved Disk Filters

A tightly compressed stack of grooved disks provides a large filtration surface area that is excellent for capturing organic matter and other deformable particles. A telescoping core allows for quick, thorough cleaning of the filter.

Disk elements are available for use with 1" to 3" Amiad plastic filters and 2" to 4" Amiad steel filters.

Weave-wire Screen Elements

Rugged molded plastic ribs support a stainless steel or nylon woven screen to filter suspended solids. The screen can be quickly removed from its housing to be washed manually, or cleaned without disassembling the filter housing with these optional accessories:

• Autoflush
• Brushaway
• Scanaway

Weave-wire screen elements are available for use with 3/4" to 3" Amiad plastic filters or 2" to 14" Amiad steel filters.

In addition to Amiad's filtration technology, the company has also been a leader in fertigation systems for decades. Fertigation - the art and science of adding carefully measured amounts of plant nutrients to irrigation water - allows the precise dosing and placement of fertilizers.

Amiad fertigation systems include suction and gravity pumps and our new Electronic Fertilizer Injector (EFI), a state-of-the-art system that can run as a stand-alone system, linked to a water flow meter, or controlled by an irrigation computer.
New Amiad Electric Fertilizer

Precision metering and placement helps nourish crops while minimizing the chance of over-application or off-target movement of plant nutrients - another element in Amiad's commitment to clean water and clean technology.