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

Pump buy return on investment may be measured in days

By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR

A international producer of scented plastic garbage luggage was on the lookout for a substitute for using pre-scented plastic pellets. เพรสเชอร์เกจ at a tradeshow led them to a precision gear metering pump answer that gave them accuracy and consistency on the low move charges required, whereas also reducing their prices and bettering employee health. Yearly financial savings are so high that the return on funding for the pump system can be measured in days.
Seeking an alternate for expensive pre-scented plastic pellets

A international producer of scented plastic garbage baggage was looking for a substitute for the use of pre-scented plastic pellets, which required a devoted silo for every of the 20 available fragrances. The pellets are pneumatically conveyed to every silo from both tanker trucks or rail vehicles and the producer was experiencing logistical issues related to keeping the silos crammed. They additionally needed to carry high prices for sustaining the stock of the pre-scented pellets.
In addition, the closely concentrated scents had been causing well being considerations for the employees who complained of complications. To mitigate this concern, every extruder line was fitted with a vacuum exhaust hood to expel the fumes to the outdoors. On occasion, these emissions led to complaints from neighbors and citations from the United States Environmental Protection Agency.
The firm was looking for a method to use plain plastic pellets and apply scented oil directly to the plastic sheet instantly after the extrusion process to minimize back prices, logistical challenges, and energy use. They had tried to build such a system in-house however had struggled to realize accuracy and consistency on the low flow rates they required. They decided to hunt a pump-based solution that could instantly spray perfume on the nice and cozy melted sheet plastic because the in-house answer could not meet rigorous quality management standards requiring the spray-on scent to precisely match that of pre-scented pellets.
Finding a solution on a tradeshow flooring

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 application consultants if the pumps might be a match with their application. After accumulating info on the applying, an area supervisor for the pump producer with intensive experience in dosing and blending techniques visited the plant to get a firsthand view of current operations and gather further data.
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 duty applications. The pump options an accurate, repeatable, pulse free move in a compact design ideal for dosing components corresponding to colors, flavors, and fragrances.
This sort of pump is outlined as rotary as a result of the drive shaft is rotated as in comparison with other kinds of pumps utilizing a reciprocating motion and can also be considered to be a optimistic displacement sort as a end result of the displaced volume is constant and does not range.
Pumping action is achieved by filling the gear tooth spaces and transporting the fluid around the outer diameter of the gears. When the gear enamel mesh, the fluid is displaced and compelled to the outlet facet of the pump. The circulate fee can solely be adjusted by growing or decreasing the speed at which the shaft is rotated. The pump chosen presents precision grinding and lapping processes that result in a precision metering instrument, producing precise, pulse-less, and repeatable fluid move.
pressure gauge 10 bar offer extraordinarily tight operating clearances to attenuate fluid slip. Manufacturing tolerances on many components 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 speed controller to take care of 0.1 % 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 via hardened 440C collection stainless steel, specialty handled 316 stainless steel, and top quality software steels similar to D2, M2, M4 and CPM-M4 to supply good corrosion and abrasion resistance.
The bag manufacturer chosen a model with a magnetic drive (mag-drive) sealing possibility, which might get rid of shaft leakage of fluids, increasing plant safety and lowering volatile organic compound emissions. The use of a magnetic coupling additionally eliminates downtime as a result of mechanical seal failures and eliminates the need for buffer fluids.
New solution reduces prices and offers uniform fragrance distribution

The new Zenith pump system gave the scented bag producer a continuous, pulse free course of, which ensures equal and uniform fragrance distribution. By adding the scent directly to the luggage after leaving the extruder, the plastic bag producer not only eradicated the need 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 travel from the silos to the extruders.
The manufacturer purchased the first system and after successful trials, ordered six additional methods. Over the past two years they’ve bought more than 30 techniques, with plans to order extra. The manufacturer is also interested in having Zenith conduct annual subject calibrations of every system.
After two years of operation, the manufacturer estimates a yearly savings of roughly $480,000 per skid in operation. With 30 skids now running, the return on funding for every system buy could be measured in weeks. To date, there have been no odor complaints for the explanation that buyer put in the Zenith techniques

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