Product Literature
Standard Characteristics:
• Filter element: ST.ST. screen AISI 316, supported by a PVC cylinder.
• Available filtration grades: 80-3000 micron
• Filter housing material of construction: Carbon Steel ST37.2
• Pre-treatment: sand blasting up to Sa 2.5 grade
• Exterior & Interior coating: electrostatic oven baked polyester-epoxy powder coating with
a thickness of 150-200 micron
• Connections: Victaulic and Flange
• Maximum recommended working pressure: up to 10 bar (145 psi).
• Minimum operating working pressure during flushing: 2 bar (29 psi)
• Equipped with an electronic control system (6V DC, 12 V DC, 24V AC)
Operation:
Filtration
Water enters the filter through the “inlet” and passes through the coarse screen, that
functions as a “first stop” for rough particles. Water then reaches the fine screen, which
further purifies the flow by separating smaller particles from the water. As more water flows
through, impurities build up on the fine screen. As impurities on the screen accumulate, a
pressure imbalance is built up between the internal section of the fine screen and its external
section.
Self-cleaning process - "Flushing“
When the difference in pressure (DP) reaches the preset value on the differential pressure
indicator, the following events happen while the water continues to flow to the system units:
the flushing valve opens, pressure is released fro the hydraulic piston, and water flows
outside; pressure in the hydraulic motor chamber and the dirt collector is significantly
lowered, and the dirt collector nozzles begin a suction process; the water flows through the
hydraulic motor which rotates the dirt collector around its axis; the pressure released from
the piston and the high pressure inside the filter cause linear movement of the dirt collector;
the combination of the linear movement and rotation significantly clean the whole internal
screen surface.
The flushing process takes 10 seconds. The flushing valve closes at the end of the cycle and
the increased water pressure returns the hydraulic piston to its initial position. The filter is
now ready for the next cycle while clean and filtered water flows through the “Outlet”.
During the whole process water supply is uninterrupted.
PRODUCT INFORMATION
Applications: medium flow screen filter with
automatic suction back flushing for standard
industrial and municipal applications. Very popular
in the irrigation sector.
V.10/2019
Series AF800
Automatic Hydraulic Filter
The Toro Company | Ag Business | 1588 N. Marshall Avenue, El Cajon, CA 92020-1523, USA |
Tel: + 1 (877) 373-0087 or + 1 (619) 596-2495 | toro.com/agriculture