Filtration+Separation December 2007
Reverse air dust collectors without compressed air A new family of dust collectors has been developed by Sly Inc. The RAC Series of reverse air collectors feature an advanced reverse air cleaning system that removes accumulated dust from filter bags without requiring compressed air. Each collector has an internal blower powered by an explosion-proof motor. A cleaning arm with high velocity nozzles directs this air for optimal continuous cleaning of each filter bag on every rotation of the arm and a heavy duty 3/4 HP explosion proof gear drive motor (designed for continuous service) is employed to move the cleaning arm.
Sly RAC collectors can filter from about 4500 to 70,000 ACFM with a variety of filter media are available. The collectors come standard with walk-in clean air plenum, 10 gauge carbon steel construction, snap band top load filter bags, and heavy duty 12 wire cages made of 11 gauge galvanized wire. They also feature pressure differential gauge, lifting lugs, tangential inlet with vortex breaker and OSHA service platform, caged ladder and supports. www.slyinc.com
New design of condensate separator Condensate Systems Ltd has developed a new condensate separator, which the company says represents a radically new approach to separator design. Compressed air, condensate separators can be large, messy items that are expensive to own and maintain. For many companies the cost alone is enough to deter them from using a separator, despite the heavy legal penalties for expelling untreated oily condensate to drain or ground, the company says. The new separator reportedly costs a fraction of conventional equipment and performs to within 0.1% of total lubricant separation. The working parts of the new separator are simple, nonmechanical and with the exception
The Sly RAC collectors.
of filter changes, eliminate maintenance. Unlike a weir-type separator, the design does not rely on the oil coming out of suspension, or require a settling tank, which can propagate harmful bacteria. When the condensate enters the separator it is first depressurised safely in a primary filter, made from 50% recycled polypropylene. The bulk of the lubricant is adsorbed here, along with any particulates, before the filtrate is polished with an activated carbon filter. Three Sepura models, covering up to 1250m3/h/750 cfm compressor capacity, allow correct sizing to easily achieve 10 ppm in the drain water. www.oil-water.com
Condensate Systems’ new range of separators.
Pressure sensor monitors cleanliness
Flow meter for large pipe applications
American Sensor Technologies has released a wet/wet differential pressure sensor that can monitor the cleanliness of filters in either liquid or gas applications. When installed within a water filtration system, the Model 5000 wet/wet differential pressure sensor can detect the difference between the upstream pressure, that drives the water through the filter, and the downstream pressure that leads the filtered water through the system and notify the system when the filter is clogged.
Krohne Inc has developed a new clamp-on ultrasonic flowmeter, the Optisonic 6300 which is suitable for large-pipe applications in heavy industrial and hazardous environments.
For example, in a 7 bar pump using a filter to purify water for drinking, if the pressure in the downstream side of the system drops to 5.5 bar, the filter should be changed. With a 24V DC supply powering the Model 5000 wet/wet different pressure sensor and a selected 420 mA output signal, the sensor can be calibrated with a 7 bar line pressure and a 1.4 bar differential pressure.When the water filtration system is operating with a clean filter, the output signal will be 4 mA. As the pressure decreases on the downstream, the output signal will increase. Once the downstream pressure decreases to 5.5 bar, the sensor’s output signal will reach the full scale of 20 mA. www.astsensors.com
Offering performance capabilities that exceed those of the UFM600 T model, the Optisonic 6300 features improved measurement accuracy, ATEX Approval, an extended temperature range and the ability to handle multiple line sizes, the company says. Another new feature is an integrated display that allows signal quality to be shown in real-time during the calibration of the signal transducer. This allows engineers to optimise flowmeter performance and maximize measurement accuracy. The flowmeter’s clamp-on mechanism has been designed to aid installation in industrial applications and it is also fitted with a protective casing that ensures smooth and efficient operation in demanding and hazardous conditions. Available in three sensor sizes, the Optisonic 6300 can cover the entire pipe diameter range from ½ inch to 160 inch. www.krohne.com