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

Pump purchase return on investment can be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A global manufacturer of scented plastic rubbish baggage was in search of a substitute for using 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 rates required, whereas also lowering their prices and improving worker well being. Yearly savings are so high that the return on funding for the pump system may be measured in days.
Seeking an alternate for costly pre-scented plastic pellets
A world manufacturer of scented plastic garbage luggage was looking for a substitute for using pre-scented plastic pellets, which required a dedicated silo for each of the 20 out there fragrances. The pellets are pneumatically conveyed to each silo from either tanker trucks or rail automobiles and the manufacturer was experiencing logistical issues associated with preserving the silos stuffed. They additionally had to carry excessive costs for sustaining the stock of the pre-scented pellets.
In addition, the heavily concentrated scents had been inflicting health considerations for the workers who complained of headaches. To mitigate this concern, each 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 firm was seeking a means to make use of plain plastic pellets and apply scented oil on to the plastic sheet immediately after the extrusion course of to scale back prices, logistical challenges, and vitality use. They had tried to construct such a system in-house but had struggled to achieve accuracy and consistency on the low circulate rates they required. They decided to hunt a pump-based solution that might immediately spray perfume on the good and cozy melted sheet plastic because the in-house resolution could not meet rigorous high quality management standards requiring the spray-on scent to exactly match that of pre-scented pellets.
Finding เกจวัดแรงดันสูง on a tradeshow floor
Design engineers from the plastic bag producer attending the PackExpo show noticed a working demonstration of precision gear metering pumps made by Zenith and asked application experts if the pumps may be a match with their application. After collecting information on the applying, an space supervisor for the pump producer with intensive experience in dosing and mixing systems visited the plant to get a firsthand view of present 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 purposes. The pump options an accurate, repeatable, pulse free flow in a compact design ideal for dosing additives similar to colours, flavors, and fragrances.
This sort of pump is defined as rotary as a outcome of the drive shaft is rotated as compared to different types of pumps using a reciprocating movement and is also thought-about to be a positive displacement sort as a end result of the displaced quantity is constant and doesn’t 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 aspect of the pump. The move price can only be adjusted by growing or reducing the speed at which the shaft is rotated. The pump chosen provides precision grinding and lapping processes that lead to a precision metering instrument, producing exact, pulse-less, and repeatable fluid flow.
The pumps supply extraordinarily tight operating clearances to reduce fluid slip. Manufacturing tolerances on many components are to +/- 50 millionths of inch with surface finishes as smooth as four micro inches or higher. The pumps are offered with an AC “closed loop” motor speed controller to maintain 0.1 percent pump velocity accuracy.
The Zenith 9000 sequence pump is available in 11 sizes with capacities ranging from .003 to 300 GPH. Wetted parts are available in through hardened 440C sequence chrome steel, specialty handled 316 stainless-steel, and prime quality tool steels corresponding to D2, M2, M4 and CPM-M4 to supply good corrosion and abrasion resistance.
The bag producer selected a model with a magnetic drive (mag-drive) sealing option, which may remove shaft leakage of fluids, growing plant safety and decreasing volatile natural compound emissions. The use of a magnetic coupling additionally eliminates downtime because of mechanical seal failures and eliminates the need for buffer fluids.
New solution reduces costs and provides uniform perfume distribution
The new Zenith pump system gave the scented bag manufacturer a steady, pulse free process, which ensures equal and uniform perfume distribution. By including the scent on to the luggage after leaving the extruder, the plastic bag manufacturer not solely eradicated the want 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 purchased the primary system and after successful trials, ordered six extra techniques. Over the past two years they’ve bought more than 30 techniques, with plans to order more. The producer is also thinking about having Zenith conduct annual area calibrations of every 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 operating, the return on funding for each system purchase could be measured in weeks. To date, there have been no odor complaints because the buyer installed the Zenith methods
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