Precision Gear Metering Pump Provides Scented Plastic Bag Manufacturer Accurate and Consistent Continuous Pulse-Free Process

Pump buy return on funding can be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A world manufacturer of scented plastic rubbish luggage was in search of an alternative to the use of 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 on the low circulate rates required, whereas additionally decreasing their prices and enhancing worker well being. Yearly financial savings are so excessive that the return on investment for the pump system can be measured in days.
Seeking an alternative for expensive pre-scented plastic pellets
A international producer of scented plastic rubbish baggage was on the lookout for a substitute for using pre-scented plastic pellets, which required a devoted silo for every of the 20 available fragrances. The pellets are pneumatically conveyed to each silo from both tanker vans or rail cars and the producer was experiencing logistical points related to preserving the silos crammed. They additionally had to carry excessive prices for maintaining the inventory of the pre-scented pellets.
In addition, the closely concentrated scents had been causing health concerns for the workers who complained of headaches. To mitigate เกจวัดแรงดันปั๊มลมpuma , every extruder line was fitted with a vacuum exhaust hood to expel the fumes to the outside. On occasion, these emissions led to complaints from neighbors and citations from the United States Environmental Protection Agency.
The firm was in search of a method to use plain plastic pellets and apply scented oil directly to the plastic sheet instantly after the extrusion course of to scale back prices, logistical challenges, and power use. They had tried to construct such a system in-house but had struggled to attain accuracy and consistency at the low move rates they required. They determined to hunt a pump-based answer that would instantly spray fragrance on the nice and cozy melted sheet plastic as a outcome of the in-house solution could not meet rigorous quality control requirements requiring the spray-on scent to precisely match that of pre-scented pellets.
Finding a solution on a tradeshow floor
Design engineers from the plastic bag manufacturer attending the PackExpo present observed a working demonstration of precision gear metering pumps made by Zenith and requested software experts if the pumps might be a match with their application. After collecting information on the appliance, an area manager for the pump producer with intensive experience in dosing and mixing systems visited the plant to get a firsthand view of present operations and gather extra info.
Working with the pump manufacturer’s design group they developed a system resolution using a Zenith B-9000 Series rotary positive displacement pump particularly designed for single stream chemical duty purposes. The pump features an correct, repeatable, pulse free circulate in a compact design ideal for dosing components corresponding to colours, flavors, and fragrances.
This type of pump is defined as rotary as a end result of the drive shaft is rotated as in comparability with different kinds of pumps using a reciprocating motion and is also thought-about to be a optimistic displacement kind because the displaced quantity is fixed and does not differ.
Pumping action is achieved by filling the gear teeth areas and transporting the fluid around the outer diameter of the gears. When the gear tooth mesh, the fluid is displaced and compelled to the outlet facet of the pump. The flow price can only be adjusted by rising or reducing the velocity at which the shaft is rotated. The pump selected presents precision grinding and lapping processes that end in a precision metering instrument, producing precise, pulse-less, and repeatable fluid move.
The pumps provide extremely tight operating clearances to attenuate fluid slip. Manufacturing tolerances on many elements are to +/- 50 millionths of inch with surface finishes as clean as 4 micro inches or higher. The pumps are offered with an AC “closed loop” motor velocity controller to hold up zero.1 p.c pump velocity accuracy.
The Zenith 9000 collection pump is out there in eleven sizes with capacities ranging from .003 to 300 GPH. Wetted components can be found in through hardened 440C series chrome steel, specialty treated 316 stainless-steel, and high quality software steels such as D2, M2, M4 and CPM-M4 to offer good corrosion and abrasion resistance.
The bag manufacturer chosen a mannequin with a magnetic drive (mag-drive) sealing possibility, which can get rid of shaft leakage of fluids, increasing plant safety and lowering unstable organic compound emissions. The use of a magnetic coupling also eliminates downtime due to mechanical seal failures and eliminates the necessity for buffer fluids.
New solution reduces prices and provides uniform fragrance distribution
The new Zenith pump system gave the scented bag producer a steady, pulse free course of, which ensures equal and uniform perfume distribution. By adding the scent directly to the baggage after leaving the extruder, the plastic bag manufacturer not only eradicated the necessity to have separate pellet silos for each scent, but in addition eradicated the necessity to vent the fumes that come from the pellets as they journey from the silos to the extruders.
The manufacturer bought the first system and after successful trials, ordered six further techniques. Over the past two years they’ve bought greater than 30 techniques, with plans to order more. The manufacturer is also interested in having Zenith conduct annual area calibrations of every system.
After two years of operation, the manufacturer estimates a yearly financial savings of roughly $480,000 per skid in operation. With 30 skids now running, the return on investment for every system buy may be measured in weeks. To date, there have been no odor complaints since the buyer put in the Zenith techniques

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