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Products

   Self Cleaning Filters (SCF)

      Standard Pressure SCF

      High Pressure SCF

      Vertical Exit SCF

      Rotor Blade SCF

      Mobile Trolley System

   Strainers

      Backwash Strainers

      Duplex Basket Strainer

      Fabricated Strainers

      Simplex Basket Strainer

      Temporary Strainers

      Y-Type Strainers

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Filtration Midwest

Advantages 

• System does not have to be shut down to clean the element.

• Operator does not come into contact with the fluid. 

• Fluid does not come into contact with the air. 

• No cartridges or bags to replace allows for a cleaner, safer work environment. 

• No fluid loss during cleaning. 

• Vertical Exit model allows virtually no product loss at end of batch. 

• Works well on high viscosity fluids. 

• Can be fully automated to eliminate operator involvement. 

• Pneumatically operated units available for hazardous environments. 

• Trolley System permits one unit to be used on multiple lines. 

• All products are manufactured under ISO 9001 Quality Assurance Standards. 

• All products fully meet the requirements of the "Buy American Act".

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.

Automation Options

 

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.

Cleaning Blades & Elements

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.

Quick Release Operation

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.

Specifications

News

Perforated Elements for Airpel Self Cleaning Filters

Airpel has introduced a Perforated Element for specific applications. The Perforated element prevents "platelet" shaped debris from passing though the element in "letter box" fashion. This element also makes the passage of fibrous debris practically impossible. The element is an all welded 316 S.S. assembly.

Perforated Plus (special order only) - with round holes and an exceptionally large open area. The element is unique to Airpel, and has unrivaled performance.

Operation

Operation & Models of Self Cleaning Filters (SCF's)

Airpel offers four forms of blade type SCF's, all working on the same basic principle. Incoming fluid passes through a wedgewire or perforated element before exiting the filter body. The debris is trapped on the outside of the element. The micron rating of the element is the spacing of the wedgewire or the diameter of the perforations. As debris collects on the outside of the element and progressively blocks the openings, the differential pressure increases. The element is cleaned by rotating it against a pair of stationary scraper blades. These scraper blades lift the debris from the element and the debris tends to move down the channel formed by the blade shield. The effects of gravity then cause the debris to sink into the sump of the filter, where it can be periodically drained.

The Airpel Self Cleaning Filters can be cleaned without disrupting the liquid flow. Because the element cleaning operation is independent of the debris draining operation a number of cleaning cycles can be performed before it is necessary to drain the debris from the filter sump. Liquid loss is therefore minimized. (Some operators, especially those on batch production, do not drain the filter during the batch run. This eliminates the liquid loss until the final washout of the process pipe-work.)

Airpel Self Cleaning Filters can be manually operated, fully automated, or motorized only (electric or pneumatic). The Self Cleaning Filters can be used on fluids of all viscosities. Filtration from 50 microns and up.

	STANDARD PRESSURE SCF An inline filter where the cast head of the filter is fixed in the pipeline and a spun stainless steel bowl is attached to the head by a quick release Vee band clamp arrangement. Removal of the bowl to access the scraper blades and element is a "no-tools" operation. Removal of the blades is also "no-tools" by means of quick release rods. Clearance is required below the filter to permit access for inspection or maintenance.
	HIGH PRESSURE SCF An in-line filter of all cast construction where the main body of the filter is fixed in the pipeline. The filter cover is bolted to the main body. Attached to the filter cover is the element and scraper blade assembly. Clearance is required above the filter to permit the removal of the cover/element/blade assembly for inspection or maintenance.
	VERTICAL EXIT SCF (Self-draining at end of batch) With a horizontal inlet and an exit at 90° to the inlet in the vertically "downwards" direction, the filter is all cast construction and the main body is fixed in the pipeline. Like the High Pressure Filter, the cover is bolted to the main body with the element and scraper blade assembly attached to the cover. Clearance is required above the filter for maintenance.
	ROTOR BLADE SCF The Rotor Blade SCF "self drains" through a low outlet port, similar to the Vertical Exit Filter and is fitted with an agitator that "stirs" the fluid on "dirty" side (and optionally) on the "clean" side of the element". The element assembly can be readily removed via a quick release "lid" and the smooth body of the filter permits easy cleaning of the internal surfaces. The filter is ideally suited for fluids such as chocolate, paint, ink or colloidal solutions or suspensions. A heating jacket can be fitted.