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Technology news 13 Filtration+Separation December 2007 Valves improve filter reliability Rotorflush Filters has developed a 2 inch balanced stainless steel valve which will throttle and shut off pressures up to 10 bar with only a 50 mbar pressure differential across the sensing diaphragm. The valve is an addition to Rotorflush’s range of self-cleaning filters and is being supplied as an optional extra to its range of filterpumps to give absolute reliability to the self-cleaning filter in the most difficult of conditions. The valve, which has a 50 mm orifice, is constructed entirely of stainless steel with the exception of the diaphragms. It consists of a stainless steel body with two balancing rolling diaphragms, which almost eliminate friction losses. There is a larger sensing diaphragm, one side of which is open to the environment. The other side connects to the Rotorflush filter. In operation the valve normally remains fully open allow the Rotorflush Filterpump to give full output. However on sewage works during storms, for example, the sewers can be flushed out, causing high levels of solids to enter the sewage works. Occasionally this can overcome the Rotorflush Filterpump, causing it to block. The valve senses when solids are beginning to build up on the filter screen faster than the self-cleaning jets can clear it. This build up causes the pressure inside the filter to drop and this causes the valve to start throttling the output of the Filterpump, allowing it to continue to work without interruption. When the solids levels in the water start reducing the valve opens again, restoring full flow from the Filterpump. www.rotorflush.com Stainless steel separator Siemens Water Technologies has made some product enhancements to its Forty-X disc filter, which was previously known as the Spider Disc Filter. The tertiary filter disc technology incorporates several new product improvements including a pressure-assisted seal, a trash-tolerant box design, and sliding tank covers. The Forty-X Disc Filter incorporates a proprietary pleated panel design for use in applications such as municipal tertiary filtration, water reuse, and process water filtration. The pleated media configuration reportedly increases the surface filtration area by 40% and reduces the possibility of media deformation and reaping when compared to traditional flat panel, woven disc filters. The new pressure-assisted seal added to the pleated panel’s now eliminates leak points and increases throughput capacity, allowing the filtration panel to sustain and operate at twice the headloss. After flowing through the disc filter’s new proprietary filtration box, trash material is rejected out of the system. This ensures the unhindered flow of water between panels and the proper rejection of plastics, algae clumps, and other floatables. Finally, stainless steel sliding covers have been added for increased operator safety. The covers, which enclose the disc/drum’s entire internal assembly, make accessibility and maintenance easier. The Forty-X disc filter uses an inside-out filtration technique by which the filtration medium is fed from the inside and the outside of the medium is submerged in filtered water. Solids are deposited on the inside face of the medium, while filtrate is produced on the outside. The filter medium is a woven polyester cloth with an absolute micron size rating (typically 10 µm for tertiary reuse). www.siemens.com The Rotorflush control valve. Steam specialist TLV Corp has launched the SF1, a stainless steel separator-filter which has been designed to improve heating efficiency and product quality by removing condensate and particulates such as dirt and scale. It can produce dust/dirt free, high-quality, dry steam or inert gas for food manufacturers, breweries, hospital sterilisation and the cosmetic, pharmaceutical, or chemical industries. The separator can eliminate water spots by delivering dry steam through TLV’s cyclone separator. The built-in cyclone separator’s one piece design reduces installation space requirements and eliminates condensate, dirt, and scale before filtering. The five-layer sintered wire mesh filter facilitates the cleaning process by trapping dirt on the outside surface, and the body is made of CF8 stainless steel. www.tlv.com Siemens improves disc filter Long range smart ultrasonic sensors New MassaSonic M-300/150 and M-300/95 smart ultrasonic sensors manufactured by Massa Products Corp USA are now available from sensing specialists Vydas International Marketing. The M-300/150 detection range is up to 2.5 m and the M-300/95 is up to 4.5 m. This complements the already established M-300/210 which has a range approximately from 100 mm up 1.3 m maximum. The M-300 ultrasonic sensor design incorporates ultrasonic and microprocessor technology to provide precision non- contact distance measurement for factory automation or industrial process control. Operating from 12 to 24 V DC, the M-300 family includes several sensor models that operate at different ultrasonic frequencies with different ranges. A linear output of 0 to 10 VDC is provided. www.massa.com

Valves improve filter reliability

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Technology news 13Filtration+Separation December 2007

Valves improve filter reliabilityRotorflush Filters has developed a 2 inch balanced stainless steel valve which will throttle and shut off pressures up to 10 bar with only a 50 mbar pressure differential across the sensing diaphragm.

The valve is an addition to Rotorflush’s range of self-cleaning filters and is being supplied as an optional extra to its range

of filterpumps to give absolute reliability to the self-cleaning filter in the most difficult of conditions.

The valve, which has a 50 mm orifice, is constructed entirely of stainless steel with the exception of the diaphragms. It consists of a stainless steel body with two balancing rolling diaphragms,

which almost eliminate friction losses.

There is a larger sensing diaphragm, one side of which is open to the environment. The other side connects to the Rotorflush filter. In operation the valve normally remains fully open allow the Rotorflush Filterpump to give full output. However on sewage works during storms, for example, the sewers can be flushed out, causing high levels of solids to enter the sewage works. Occasionally this can overcome the Rotorflush Filterpump, causing it to block. The valve senses when solids are beginning to build up on the filter screen faster than the self-cleaning jets can clear it. This build up causes the pressure inside the filter to drop and this causes the valve to start throttling the output of the Filterpump, allowing it to continue to work without interruption. When the solids levels in the water start reducing the valve opens again, restoring full flow from the Filterpump.

www.rotorflush.com

Stainless steel separator

Siemens Water Technologies has made some product enhancements to its Forty-X disc filter, which was previously known as the Spider Disc Filter. The tertiary filter disc technology incorporates several new product improvements including a pressure-assisted seal, a trash-tolerant box design, and sliding tank covers.

The Forty-X Disc Filter incorporates a proprietary pleated panel design for use in applications such as municipal tertiary filtration, water reuse, and process water filtration. The pleated media configuration reportedly increases the surface filtration area by 40% and reduces the possibility of media

deformation and reaping when compared to traditional flat panel, woven disc filters.

The new pressure-assisted seal added to the pleated panel’s now eliminates leak points and increases throughput capacity, allowing the filtration panel to sustain and operate at twice the headloss.

After flowing through the disc filter’s new proprietary filtration box, trash material is rejected out of the system. This ensures the unhindered flow of water between panels and the proper rejection of plastics, algae clumps, and other floatables.

Finally, stainless steel sliding covers have been added for

increased operator safety. The covers, which enclose the disc/drum’s entire internal assembly, make accessibility and maintenance easier.

The Forty-X disc filter uses an inside-out filtration technique by which the filtration medium is fed from the inside and the outside of the medium is submerged in filtered water. Solids are deposited on the inside face of the medium, while filtrate is produced on the outside. The filter medium is a woven polyester cloth with an absolute micron size rating (typically 10 µm for tertiary reuse).

www.siemens.com

The Rotorflush control valve.

Steam specialist TLV Corp has launched the SF1, a stainless steel separator-filter which has been designed to improve heating efficiency and product quality by removing condensate and particulates such as dirt and scale. It can produce dust/dirt free, high-quality, dry steam or inert gas for food manufacturers, breweries, hospital sterilisation and the cosmetic, pharmaceutical, or chemical industries.

The separator can eliminate water spots by delivering dry steam through TLV’s cyclone separator. The built-in cyclone separator’s one piece design reduces installation space requirements and eliminates condensate, dirt, and scale before filtering. The five-layer sintered wire mesh filter facilitates the cleaning process by trapping dirt on the outside surface, and the body is made of CF8 stainless steel.

www.tlv.com

Siemens improves disc filter

Long range smart ultrasonic sensors New MassaSonic M-300/150 and M-300/95 smart ultrasonic sensors manufactured by Massa Products Corp USA are now available from sensing specialists Vydas International Marketing.

The M-300/150 detection range is up to 2.5 m and the M-300/95 is up to 4.5 m. This complements the already established M-300/210 which has a range approximately from 100 mm up 1.3 m maximum.

The M-300 ultrasonic sensor design incorporates ultrasonic and microprocessor technology to provide precision non-contact distance measurement for factory automation or industrial process control.

Operating from 12 to 24 V DC, the M-300 family includes several sensor models that operate at different ultrasonic frequencies with different ranges. A linear output of 0 to 10 VDC is provided.

www.massa.com

fs4410_pg10_13.indd 13fs4410_pg10_13.indd 13 21/11/2007 14:40:0521/11/2007 14:40:05