Pump buy return on funding may be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A world producer of scented plastic garbage bags was looking for an different choice to using pre-scented plastic pellets. A serendipitous encounter at a tradeshow led them to a precision gear metering pump solution that gave them accuracy and consistency at the low circulate rates required, whereas also decreasing their costs and bettering employee well being. Yearly savings are so excessive that the return on investment for the pump system may be measured in days.
Seeking an alternative for pricey pre-scented plastic pellets
A global producer of scented plastic rubbish luggage was in search of an different alternative to the usage of pre-scented plastic pellets, which required a dedicated silo for every of the 20 available fragrances. The pellets are pneumatically conveyed to every silo from both tanker vehicles or rail automobiles and the producer was experiencing logistical points related to keeping the silos filled. They additionally needed to carry excessive costs for maintaining the stock of the pre-scented pellets.
In addition, the closely concentrated scents had been causing health issues for the workers who complained of complications. To mitigate เครื่องมือวัดความดันคือ , every extruder line was fitted with a vacuum exhaust hood to expel the fumes to the outside. On event, these emissions led to complaints from neighbors and citations from the United States Environmental Protection Agency.
The company was seeking a means to make use of plain plastic pellets and apply scented oil directly to the plastic sheet instantly after the extrusion course of to reduce costs, logistical challenges, and power use. They had tried to construct such a system in-house however had struggled to attain accuracy and consistency on the low flow rates they required. They determined to hunt a pump-based answer that might immediately spray fragrance on the good and cozy melted sheet plastic as a outcome of the in-house answer could not meet rigorous high quality control standards requiring the spray-on scent to exactly match that of pre-scented pellets.
Finding a solution on a tradeshow ground
Design engineers from the plastic bag manufacturer attending the PackExpo show observed a working demonstration of precision gear metering pumps made by Zenith and requested software experts if the pumps may be a fit with their software. After collecting information on the appliance, an area supervisor for the pump producer with intensive experience in dosing and mixing methods visited the plant to get a firsthand view of current operations and collect extra information.
Working with the pump manufacturer’s design group they developed a system answer using a Zenith B-9000 Series rotary positive displacement pump specifically designed for single stream chemical responsibility functions. The pump features an accurate, repeatable, pulse free move in a compact design ideal for dosing additives similar to colours, flavors, and fragrances.
This sort of pump is defined as rotary as a result of the drive shaft is rotated as in comparison with different types of pumps using a reciprocating motion and can be thought of to be a positive displacement kind as a end result of the displaced quantity is fixed and does not differ.
Pumping motion is achieved by filling the gear enamel areas and transporting the fluid around the outer diameter of the gears. When the gear tooth mesh, the fluid is displaced and forced to the outlet facet of the pump. The circulate price can solely be adjusted by rising or decreasing the pace at which the shaft is rotated. The pump chosen presents precision grinding and lapping processes that lead to a precision metering instrument, producing precise, pulse-less, and repeatable fluid move.
The pumps offer extremely tight operating clearances to reduce fluid slip. Manufacturing tolerances on many elements are to +/- 50 millionths of inch with surface finishes as clean as 4 micro inches or better. The pumps are provided with an AC “closed loop” motor pace controller to keep up zero.1 % pump velocity accuracy.
The Zenith 9000 series pump is out there in 11 sizes with capacities starting from .003 to 300 GPH. Wetted components can be found in by way of hardened 440C series stainless-steel, specialty handled 316 chrome steel, and prime quality tool steels such as D2, M2, M4 and CPM-M4 to offer good corrosion and abrasion resistance.
The bag producer selected a mannequin with a magnetic drive (mag-drive) sealing choice, which can get rid of shaft leakage of fluids, growing plant safety and decreasing risky organic compound emissions. The use of a magnetic coupling additionally eliminates downtime because of mechanical seal failures and eliminates the need for buffer fluids.
New resolution reduces costs and provides uniform fragrance distribution
The new Zenith pump system gave the scented bag manufacturer a continuous, pulse free process, which guarantees equal and uniform fragrance distribution. By adding the scent on to the luggage after leaving the extruder, the plastic bag manufacturer not solely eliminated the necessity to have separate pellet silos for each scent, but additionally eliminated the necessity to vent the fumes that come from the pellets as they travel from the silos to the extruders.
The manufacturer purchased the first system and after profitable trials, ordered six additional techniques. Over the past two years they’ve purchased greater than 30 methods, with plans to order more. The producer is also thinking about having Zenith conduct annual subject calibrations of each system.
After two years of operation, the producer estimates a yearly financial savings of roughly $480,000 per skid in operation. With 30 skids now running, the return on investment for each system purchase may be measured in weeks. To date, there have been no odor complaints for the explanation that buyer put in the Zenith systems
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