F451 Self Cleaning Automatic Filter
7Pages

AUTOMATIC FILTER F451 Application The self-cleaning Automatic Filter F451 is pneumatically operated and used for the separation of solids in various different media like seawater, river water or process water. The Filter ensures reliable and continuous filtration in a variety of applications like cooling water cycles or water treatment plants. The filter can operate at very low pressures of only ≥ 0,7 bar and is characterized by an unmatched low pressure loss, a compact design and near maintenance-free operation. Due to the standardized design and the use of cast housings the F451 sets a new benchmark when it comes to technical and economic efficiency. Function The contaminated medium flows through the strainer from the inside to the outside. The cleaning cycle is initiated either by a timer or by reaching the defined differential pressure value. Then, the backflush valve opens and larger particles are flushed out. Subsequently the customized flushing disc moves into the strainer and creates a gap between the disc and strainer. The flow velocity increases locally around the disc within the gap between the flushing disc and the strainer (Bernoulli effect) and the remaining particles are removed and flushed out via the backflush valve. The filtration continues uninterrupted during the entire cleaning cycle. The cleaning frequency depends on the fluid and the degree of contamination. The filter can be installed in a vertical and horizontal orientation. Technical Data In- / outlet: Operating medium: Volume flow: Design pressure: Design code and guidelines: PED, EN13445, ASME VIII Div.1, ATEX Slot wedge wire, basket acc. customer’s specification ≥ 100 µm (slot wedge wire) acc. customer’s specification ≥ 1 mm (basket with perforated plate) Cover with bolts and nuts (stainless steel) Screw (stainless steel) acc. customer’s specification Flange acc. DIN EN 1092-1 / -2 acc. customer’s specification Thread (e.g. ASME B16.5) Grade of filtration: Filter cover: Ventilation: Connection: Materials Housing: Cover: Cylinder rod: Differential pressure switch: Strainer: Cast, stainless steel Stainless steel Stainless steel Stainless steel 1.4571, Super Duplex stainless steel Super austenitic stainless steel Super austenitic stainless steel Super Duplex stainless steel Monel acc. customer’s specification Powder coating RAL 5018 Glass bead blasted Powder coating 5018 Glass bead blasted acc. customer’s specification acc. customer’s specification acc. customer’s specification acc. customer’s specification Surface Treatment Housing inside: Housing outside: Cast Stainless steel Cast Stainless steel Further options and customer specific solutions are available upon request.

Self-Cleaning Automatic Filter F451 BENEFITS • • • • • • Continuous filtration with automatic cleaning based on the bernoulli principle Flow rates from 5 m³/h to 1200 m³/h Sizes from DN32 to DN300 Operation pressure from 0,7 to 10 bar GGG40, stainless steel, super austenitic stainless steel Screen finenesses from 100 μm to 10 mm states that for an inviscid flow, an increase in the speed of the fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid’s potential energy.The vertical capillary tube showing the difference delta-p of the static pressure. ∆p low velocity...

Filtration As the fluid flows continually through the filter, particulate is trapped against the inner surface of the screen, from top to bottom. The duration of the filtration phase depends on the level of suspended solids in the fluid, the particle distribution and the flow. First back flush phase Cleaning begins automatically according to a timed cycle, or after a high differential pressure signal, by the opening of the back flush valve. Flow is maintained through the filter which continues to clean the fluid, whilst at the same time a % of the fluid loosens larger and easy to remove...

Components F451 A new patented cover system guarantees easy maintenance of the filters in any position due to decreased weight, screw-in connection and user-friendly piping. A spring-closing backflush valve specially designed for this filter series, a cylinder with integrated solenoid valve and the standard use of slotted-hole screens with more than 50% free screen area are just some of the many technical innovations of this filter series. A leakage protection system developed by Schünemann in the filter cover prevents water from entering the backflushing cylinder and corroding it in the...

Components F451 - Local control unit The SAB Standard Controller regulates all functions of the F451 filters. Parameter entries are made using the keyboard or via the integrated port. It is equipped with a main On/Off button, LCD display and 6 navigation buttons. The filter control unit is installed inside an insulated plastic case with protection IP65. It can be supplied with 24VDC or 240VAC power. Additionally to the inputs for the differential pressure switch and limit switches, the PLC integrates inputs for external flushing, error quitting and flushing lock - all signals coming from...

Standard grade of filtration: Up to DN 200: 100µm, 300µm From DN 250: 150µm, 300µm ** Type A only available in stainless steel The Automatic Filter shall be installed downstream of the pump on the pressure side. Technical change

Filter design DESIGN CHART Stainless steel The stainless steel filters (1.4581/SS316) can be used for process water, river water or waste water whereas the super austenitic steel filters (1.4557) are most suited for sea water or chlorinated water. They can be supplied with all common flanges/threaded connections according to EN, ANSI, JIS or others. In addition to this, F451 filters are also offered with Victaulic®/Minimax® coupling connections. All F451 filters can be provided with a ASME U-Stamp or PED conformity certificate. SAB offers the F451 filters in stainless steel in standard...