Large Filters
Catalog Page 41

The Amiad Scanaway filter is a great filter to use if your water source has a lot of debris in it. This filter is for large systems, with a minimum pressure requirement of 35 PSI, and a minimum flow of 35 GPM required for flushing. There is minimal head loss as the water passes through the filter.
The Scanaway assembly consists of a hollow PVC pipe with suction nozzles that face the inner surface of the screen. When you crank the external handle, it turns the scanner so that it spirals across the screen surface without touching it. Opening the exhaust valve on the filter lid creates low pressure in the scanner shaft, which causes the scanner nozzles to suck in the dirt from the screen surface and expel them out the flush valve. The scanning is done during the filtering process without having to stop the water supply so you can clean the filter while it is in operation. A convenient pop-up plugging indicator lets you know when the unit needs flushing.

• Maximum Flow: 80 GPM
• Filter Area: 72 sq. in.
• Inlet/Outlet size: 2"

Sand filters are designed to remove organic debris and particulates from water. They are highly recommended for filtering water from ponds, creeks, or irrigation ditches. This filter has a seamless fiberglass tank which won't corrode. The tank's special internal design keeps the sand bed level, ensuring even water flow and resulting in efficient filtration. It has a sight glass, a pressure gauge, a pressure relief valve and an automatic air bleed.

Sand filters are simple, effective and require very little attention. Water is routed through the sand-filled tank where the sand traps particles large and small. Eventually the dirt accumulates in the space between the sand particles, making it harder for the water to pass through. This causes the pressure in the tank to rise, which signals that the tank needs to be backflushed by reversing the water flow. Cleaning is done by backwashing so the back-wash water must be filtered.

The filter is purchased without the sand needed for operation. The sand used by the tank is too heavy to ship by UPS, so you will need to purchase it locally from a building supply store. Use #11 silica for normal applications #20 sand for T-Tape. An Arkal filter is recommended, see diagram. All sizes have 1 1/2" FPT inlet and outlet.

Note:
The maximum inlet pressure is 50 PSI.
Requires a minimum of 20 GPM flow for backflush operations
The tank has a 1 year warranty.

High pressure can damage filters, particularly media filters and stress pumps. Protect your filter and irrigation system with this valve. This valve opens when the pressure reaches 50 PSI. It will also protect screen filters to prevent blow outs when they become plugged.