TPT May 2015

Technology News

750° gas-fired vertical conveyor oven

This Grieve vertical conveyor oven features an aluminised steel exterior and interior, plus 6" thick insulated walls. Two 12" diameter tubeaxial fans, each driven by a ¾ HP motor, push/pull air through the cooling zone. All safety devices required by IRI, FM and NFPA Standard 86 for gas-heated equipment are on board this Grieve oven, including a 325 CFM, 1 / 3 HP powered forced exhauster. No. 917 also features a digital indicating temperature controller and 10" diameter circular chart recorder.

No. 917 is a gas-heated, 750°F vertical conveyor oven from Grieve, currently used for sintering Teflon tubes. Workspace dimensions are 24"W x 26"D x 53"H, while the secondary cooling zone on the oven measures 24"W x 26"D x 54"H. 350,000 BTU/ hr are installed in a modulating natural gas burner, while a 2,000 CFM, 2 HP recirculating blower provides horizontal airflow to the workload. 29 trays, each 18" x 5", rise vertically through the load/unload zone, pass up through the oven heat and then down into the cooling zone below the oven. A ½ HP motor drive, variable from 0.05" to 9" per minute, moves the trays through the unit.

Grieve Corp – USA Fax: +1 847 546 9210

Email: sales@grievecorp.com Website: www.grievecorp.com

No. 917 from Grieve Corp

Continuous in-line steam cleaning of tubes, pipes and profiles

while being designed for heavy-duty, three-shift operation. Interchangeable cleaning chambers allow the treatment of parts of different shapes and diameters, with an equipping time of less than five minutes. The higher degreasing levels are an intrinsic feature of steam cleaning due to the high temperature of the steam, which hits the part to be cleaned at a temperature of 150°. Tubes and profiles are dry after the process because of the combined effect of vacuum and evaporation. One of the distinctive features of steam cleaning systems is the low amount of waste water produced, which consists mainly of the dirt removed and the water from the condensed steam. If necessary, detergent is recycled so that effective consumption is less than 0.5 litres/hr. Specific detergent that combines cleaning with passivation or phosphating can be used, especially before painting.

interruption of the production flow; higher degreasing levels (up to a superficial tension of 38mN/m); no need for drying; speeds up to 60m/min; low water consumption; and a very low level of waste water produced. Thecompactsystemgenerallyrequires less than one metre on the production line. The steam generator and vacuum unit can be placed out of the production line. The system provides an environ- mentally friendly alternative to solvents and lower water treatment costs,

IN the tube and pipe industry, cleaning and degreasing are often required prior to surface treatment or painting, or simply to provide customers with a perfect, clean product. REA Steam Cleaning, a specialist based in Turin, Italy, has launched its new concept of continuous in-line cleaning of tubes and profiles, using the degreasing and cleaning properties of saturated steam. Claimed advantages of the system include continuous cleaning, with no

Interchangeable chambers for steam cleaning pipes and profiles

REA Steam Cleaning Srl – Italy Email: info@reasrl.eu Website: www.reasrl.eu

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M ay 2015