The unit consists of two stages of filtration, a coarse screen pre-filter and a stainless steel fine screen. Suspended solids accumulate on the inner surface of the fine screen, building up a filter layer which eventually restricts the filter and creates a pressure differential. Once the pressure differential reaches a preset level a rinse cycle is initiated by the Rain Bird supplied controller. The solids are removed from the fine screen using a concentrated backwashing method which aggressively sucks the accumulated dirt off the screen where it is carried to drain via the rinse valve. The dirt collector rotates while it moves linearly, ensuring the entire screen is cleaned in a single cycle. The process takes a matter of seconds, without interruption of system flow.
Monitoring and Controls
The standard Rain Bird automatic control system consists of a microprocessor-based controller, a differential pressure switch and a solenoid actuated flush valve. The differential pressure switch monitors inlet and outlet pressures and comes factory preset to 7 psi. When the pressure differential of 7 psi is exceeded, the flush valve is activated by the system controller, and the rinse cycle begins. If timed cleaning cycles are utilized, the system will automatically default to a backwash based on differential pressure if a 7 psi differential pressure is reached before the next timed cleaning cycle. Standard Rain Bird automatic controls are available for 115 VAC and 230 VAC, 50 / 60 Hz (user-configurable) single phase power.
Note: “I-Series” filters integrated with a Rain Bird Pump Station utilize 220VAC solenoids.
Rain Bird I-Series filters are built for years of durable, trouble-free service. The housing and covers of standard filters are made from thick
wall high-grade 304 stainless steel. 316 L sintered stainless and wedge wire screens are available to trap sand, silt, algae and other debris from clogging drip emitters, rotors, nozzles, and spray heads. Easy maintenance access to the internal components of the filter is via a removable front cover with handles that are secured to the front end of the filter housing. All wetted components are constructed of either engineered plastics or corrosion resistant metals. Larger screens are manufactured in a modular form which allows replacement of sections of the screen, rather than the entire screen element.