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

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 global manufacturer of scented plastic garbage bags was in search of an various alternative to the usage of pre-scented plastic pellets. A serendipitous encounter at a tradeshow led them to a precision gear metering pump resolution that gave them accuracy and consistency at the low flow charges required, while also reducing their costs and improving worker well being. Yearly savings are so high that the return on funding for the pump system can be measured in days.
Seeking an alternative for expensive pre-scented plastic pellets
A world manufacturer of scented plastic garbage luggage was looking for an alternative selection to the use of pre-scented plastic pellets, which required a dedicated silo for every of the 20 obtainable fragrances. The pellets are pneumatically conveyed to each silo from either tanker vans or rail cars and the producer was experiencing logistical issues associated with maintaining the silos stuffed. They additionally needed to carry high costs for maintaining the stock of the pre-scented pellets.
In addition, the heavily concentrated scents had been inflicting well being concerns for the employees who complained of complications. To mitigate this issue, 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 firm was in search of a way to make use of plain plastic pellets and apply scented oil on to the plastic sheet instantly after the extrusion course of to reduce costs, logistical challenges, and vitality use. เกรดวัดแรงดัน had tried to build such a system in-house however had struggled to attain accuracy and consistency on the low move charges they required. They determined to seek a pump-based solution that might instantly spray perfume on the good and cozy melted sheet plastic as a result of the in-house answer couldn’t meet rigorous high quality control 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 producer attending the PackExpo show observed a working demonstration of precision gear metering pumps made by Zenith and asked utility specialists if the pumps might be a fit with their software. After amassing data on the applying, an space manager for the pump manufacturer with intensive expertise in dosing and mixing 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 constructive displacement pump particularly designed for single stream chemical obligation applications. The pump options an accurate, repeatable, pulse free flow in a compact design ideal for dosing components corresponding 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 kinds of pumps utilizing a reciprocating movement and can also be thought of to be a constructive displacement type as a end result of the displaced quantity is fixed and doesn’t range.
Pumping motion is achieved by filling the gear teeth spaces and transporting the fluid across the outer diameter of the gears. When the gear tooth mesh, the fluid is displaced and forced to the outlet side of the pump. The move rate can solely be adjusted by increasing or lowering the speed at which the shaft is rotated. เกจแรงดันสูง chosen presents precision grinding and lapping processes that end in a precision metering instrument, producing precise, pulse-less, and repeatable fluid move.
The pumps offer extremely tight working clearances to attenuate fluid slip. Manufacturing tolerances on many components are to +/- 50 millionths of inch with surface finishes as easy as four micro inches or higher. The pumps are supplied with an AC “closed loop” motor velocity controller to maintain up zero.1 percent pump pace accuracy.
The Zenith 9000 sequence pump is available in 11 sizes with capacities starting from .003 to 300 GPH. Wetted parts can be found in through hardened 440C series stainless steel, specialty treated 316 chrome steel, and top quality device steels similar to D2, M2, M4 and CPM-M4 to provide good corrosion and abrasion resistance.
The bag manufacturer selected a model with a magnetic drive (mag-drive) sealing option, which may remove shaft leakage of fluids, rising plant safety and decreasing volatile organic compound emissions. The use of a magnetic coupling additionally eliminates downtime as a outcome of mechanical seal failures and eliminates the need for buffer fluids.
New solution reduces prices and provides uniform perfume distribution
The new Zenith pump system gave the scented bag producer a steady, pulse free process, which ensures equal and uniform perfume distribution. By adding the scent on to the baggage after leaving the extruder, the plastic bag manufacturer not only eradicated the need to have separate pellet silos for each scent, but also eradicated the necessity to vent the fumes that come from the pellets as they travel from the silos to the extruders.
The producer purchased the first system and after profitable trials, ordered six additional systems. Over the past two years they have bought greater than 30 techniques, with plans to order more. The manufacturer is also thinking about having Zenith conduct annual field calibrations of every system.
After two years of operation, the manufacturer estimates a yearly savings of approximately $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 customer put in the Zenith methods

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