Home	Self Cleaning Filters

Typical Applications Self Cleaning Filters are used in a wide variety of industries. These filters are often used to protect downstream equipment from debris. Self Cleaning Filters are also valuable in removing debris from liquids prior to use, or reclaiming valuable solids. We offer below a selection of applications that are currently using Airpel Self Cleaning Filters successfully. Adhesives Breweries Chemicals Chocolate Cooking Oils Cooling Lines Effluent Fuel Oil HVAC Water Inks Irrigation Systems Lacquers Liquid Fertilizers Liquid Sugar Paints, Stains, Varnishes Palm Oil Pulp & Paper Petro Chemicals Printing Recycling Water Resins River & Sea Water Spray Nozzle Protection Vegetable Oil Wash Water Waxes Back to Self Cleaning Filters Table of Contents Cleaning Blades & Elements   Diagram showing debris on the wedgewire element and the action of the cleaning blades. Flow is from the outside of the element to the inside. This eliminates the possibility of debris passing into the clean side of the liquid flow. Element is rotated either manually by a handle or automatically by a motor (electric or pneumatic). The element rotates against two stationary blades and debris is lifted from the element and deposited in the sump area. The debris can then be removed periodically by opening the manual or automated dump valve located at the bottom of the Airpel Self Cleaning Filter. Debris is flushed by line pressure. Back to Self Cleaning Filters Table of Contents Quick Release Operation Diagram showing the quick release blade arrangement. It is a simple operation to remove the blades and element from an Airpel Self Cleaning Filter. To remove the scraper blades: Twist the quick release rod until the locking pin aligns with the slot in the end plate and then pull the rod axially to remove it. The blade is no longer held in place by the tension of the quick release rod. Be prepared to lift out the blade and remove it safely. (Blades are sharp!) To remove the element: Remove the two lock nuts on the ends of the rod struts and withdraw the end plate assembly and spacer disc. Lift out the element. Back to Self Cleaning Filters Table of Contents Specifications Standard Pressure Cast Iron Stainless Steel Head Cast Iron ASTM A48/76 Class 35 Cast Stainless Steel ASTM A351 CF8M Bowl Stainless Steel SAE Grade 316S31 Stainless Steel SAE Grade 316S31 Vee Clamp Stainless Steel Stainless Steel Drive Shaft Assembly Stainless Steel SAE Grade 316 Stainless Steel SAE Grade 316 Element Stainless Steel SAE Grade 316L Stainless Steel SAE Grade 316L Scraper Blades Stainless Steel SAE Grade 301 and 316 Stainless Steel SAE Grade 301 and 316 Rod Struts & Quick Release Rods Stainless Steel SAE Grade 316S11 Stainless Steel SAE Grade 316S11 End Plate Assembly Stainless Steel SAE Grade 316S31 Stainess Steel SAE Grade 316S31 Drain Plug Brass BS 2872 CZ122 Stainless Steel ASTM A351 CF8M Element Seal PTFE Encapsulated Viton PTFE Encapsulated Viton Seals (as standard) Nitrile (-31°F to +248°F) Viton (-4°F to +392°F) Max. Working Pressure 200 psig at 212°F 200 psig at 212°F Note: 1) Working pressures may be slightly lower than stated above when operating temperature exceeds 212°F. 2) Other seal materials are available by special order. High Pressure & Vertical Exit Cast Iron (No Vertical Exit) Cast Steel Stainless Steel Body and Cover Cast Iron ASTM A48/76 Class 35 Cast Steel ASTM A216 Grade WCB Cast Stainless Steel ASTM A351 CF8M Drive Shaft Assembly Stainless Steel SAE Grade 316 Stainless Steel SAE Grade 316 Stainless Steel SAE Grade 316 Element Stainless Steel SAE Grade 316L Stainless Steel SAE Grade 316L Stainless Steel SAE Grade 316L Scraper Blades Stainless Steel SAE Grade 301 and 316 Stainless Steel SAE Grade 301 and 316 Stainless Steel SAE Grade 301 and 316 Rod Struts & Quick Release Rods Stainless Steel SAE Grade 316S11 Stainless Steel SAE Grade 316S11 Stainless Steel SAE Grade 316S11 End Plate Assembly Stainless Steel SAE Grade 316S31 Stainless Steel SAE Grade 316S31 Stainless Steel SAE Grade 316S31 Drain Plug Brass BS 2872 CZ122 Stainless Steel ASTM A351 CF8M Stainless Steel ASTM A351 CF8M Element Seal PTFE Encapsulated Viton PTFE Encapsulated Viton PTFE Encapsulated Viton Seals (as standard) Nitrile (-31°F to +248°F) Nitrile (-31°F to +248°F) Viton (-4°F to +392°F) Max. Working Pressure 290 psig at 212°F 580 psig at 212°F 580 psig at 212°F Note: 1) 2 inch High Pressure and Vertical Exit supplied with studs in the flange. 2) Other seal materials are available by special order. 3) Working pressures may be slightly lower than stated above when operating temp. exceeds 212°F. 4) Other construction materials are available by special order i.e. Hastalloy, Monel, etc. Back to Self Cleaning Filters Table of Contents Automation Options Diagram showing the Automated Self Cleaning Filter. The Airpel fully automated Self Cleaning Filter allows for stand alone, low maintenance processing of liquids. Filters can be fully automated or supplied with a continuously running motor only (electric or pneumatic). Fully electrically automated packages include a control panel, an electric motor to rotate the element, a differential pressure switch, and an actuated dump valve. These packages are delivered fully wired, tested, and ready for connection to a power source. There are two choices of control panels, the Series A and Series B. Both control panels operate the cleaning motor and dump valve in response to signals from the differential pressure switch, manual push buttons, or (Series A only) internal timers. Series A allows the cleaning motor and the dump valve to operate independently of one another. Series B simultaneously turns on the cleaning motor and the dump valve. The dump valve is a reinforced PTFE seat ball valve actuated by an electric motor/speed reduction gearbox. The cleaning motor is either 3 phase or single phase AC, and is attached to a helical gear speed reduction box. The standard output speed of the motor is 17 rpm. It is environmentally protected to IP65 (NEMA 4). Complete motor specifications are found in the Installation Manual. Optional NEMA 7 electric motors for zoned areas must have the control panel located outside of the zoned area. Pneumatic controls are also available and include a pneumatic control panel, pneumatic motor, pneumatic differential pressure switch, and a pneumatic dump valve. There are NO electrical parts in the pneumatic control system, making it a good choice for zoned areas. A 5/16 inch air line is connected by the user to supply air to the control panel. Cleaning motor and dump valve operate simultaneously in pneumatics. Internal timers allow for adjustment of the length of time the motor runs and the dump valve remains open. Automated filters from 1-1/4" thru 2" size are provided with a 1" NPT dump valve, filters from 3" thru 6" size have a 2" NPT dump valve, and fabricated filters from 8" thru 12" have a 2-1/2" NPT dump valve. Back to Self Cleaning Filters Table of Contents