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

Pump purchase return on investment may be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A global producer of scented plastic garbage luggage was looking for a substitute for the usage of pre-scented plastic pellets. A serendipitous encounter at a tradeshow led them to a precision gear metering pump answer that gave them accuracy and consistency on the low circulate charges required, while also lowering their prices and bettering worker well being. Yearly savings are so high that the return on investment for the pump system may be measured in days.
Seeking another for pricey pre-scented plastic pellets
A world manufacturer of scented plastic rubbish baggage was on the lookout for a substitute for the usage of pre-scented plastic pellets, which required a devoted silo for every of the 20 obtainable fragrances. The pellets are pneumatically conveyed to each silo from either tanker vans or rail automobiles and the manufacturer was experiencing logistical points related to maintaining the silos stuffed. They also needed to carry excessive costs for sustaining the stock of the pre-scented pellets.
In addition, the closely concentrated scents had been inflicting well being issues for the workers 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 event, these emissions led to complaints from neighbors and citations from the United States Environmental Protection Agency.
The company was looking for a method to make use of plain plastic pellets and apply scented oil directly to the plastic sheet immediately after the extrusion course of to scale back costs, 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 circulate rates they required. They determined to seek a pump-based solution that would immediately spray fragrance on the warm melted sheet plastic as a result of the in-house solution couldn’t meet rigorous high quality management requirements requiring the spray-on scent to precisely match that of pre-scented pellets.
Finding an answer 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 utility experts if the pumps might be a fit with their utility. After collecting info on the applying, an space supervisor for the pump producer with in depth expertise in dosing and blending methods visited the plant to get a firsthand view of current operations and collect additional information.
Working with the pump manufacturer’s design group they developed a system solution using a Zenith B-9000 Series rotary positive displacement pump particularly designed for single stream chemical responsibility functions. The pump features an accurate, repeatable, pulse free move in a compact design perfect for dosing components such as colours, flavors, and fragrances.
This type of pump is defined as rotary as a result of the drive shaft is rotated as in comparability with different kinds of pumps utilizing a reciprocating motion and can also be considered to be a positive displacement sort as a outcome of the displaced volume is constant and doesn’t range.
Pumping motion is achieved by filling the gear teeth areas 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 aspect of the pump. The flow price can solely be adjusted by growing or lowering the pace at which the shaft is rotated. The pump selected presents precision grinding and lapping processes that lead to a precision metering instrument, producing precise, pulse-less, and repeatable fluid circulate.
The pumps provide extraordinarily tight working clearances to reduce fluid slip. Manufacturing tolerances on many parts are to +/- 50 millionths of inch with surface finishes as easy as four micro inches or higher. The pumps are provided with an AC “closed loop” motor pace controller to take care of 0.1 p.c pump speed accuracy.
pressure gauge ราคา ถูก is available in 11 sizes with capacities starting from .003 to 300 GPH. Wetted components can be found in via hardened 440C series stainless-steel, specialty treated 316 stainless steel, and top quality software steels such as D2, M2, M4 and CPM-M4 to supply good corrosion and abrasion resistance.
The bag producer chosen a model with a magnetic drive (mag-drive) sealing option, which might remove shaft leakage of fluids, rising plant security and lowering volatile natural compound emissions. The use of a magnetic coupling additionally eliminates downtime as a end result of mechanical seal failures and eliminates the necessity for buffer fluids.
New resolution reduces prices and offers uniform perfume distribution
The new Zenith pump system gave the scented bag producer a continuous, pulse free process, which ensures equal and uniform fragrance distribution. By adding the scent directly to the baggage after leaving the extruder, the plastic bag manufacturer not only eliminated the necessity to have separate pellet silos for every 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 profitable trials, ordered six extra techniques. Over the past two years they have purchased more than 30 systems, with plans to order extra. The producer can be interested in having Zenith conduct annual field calibrations of each system.
After two years of operation, the producer estimates a yearly financial savings of approximately $480,000 per skid in operation. With 30 skids now running, the return on investment for every system buy can be measured in weeks. To date, there have been no odor complaints for the reason that buyer put in the Zenith methods

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