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

Pump purchase 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 choice to the use 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 on the low move charges required, whereas also decreasing their prices and bettering worker well being. Yearly financial savings are so high that the return on funding for the pump system can be measured in days.
Seeking เกจวัดแรงลม for pricey pre-scented plastic pellets
A world producer of scented plastic rubbish baggage was on the lookout for an various selection to the utilization of pre-scented plastic pellets, which required a devoted silo for every of the 20 out there fragrances. The pellets are pneumatically conveyed to every silo from both tanker trucks or rail cars and the producer was experiencing logistical points associated with preserving 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 health issues 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 course of to scale back costs, logistical challenges, and vitality use. They had tried to build such a system in-house but had struggled to achieve accuracy and consistency at the low circulate rates they required. They decided to seek a pump-based resolution that would directly spray perfume on the good and cozy melted sheet plastic as a outcome of the in-house answer couldn’t meet rigorous high quality control standards requiring the spray-on scent to exactly 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 utility experts if the pumps could be a match with their software. After collecting data on the application, an space manager for the pump producer with in depth expertise in dosing and blending techniques visited the plant to get a firsthand view of current operations and collect further info.
Working with the pump manufacturer’s design group they developed a system resolution utilizing a Zenith B-9000 Series rotary positive displacement pump specifically designed for single stream chemical responsibility purposes. The pump options an accurate, repeatable, pulse free circulate in a compact design ideal for dosing additives corresponding to colors, flavors, and fragrances.
This type of pump is outlined as rotary as a outcome of the drive shaft is rotated as in comparability with different kinds of pumps using a reciprocating movement and can additionally be thought-about to be a positive displacement sort as a result of the displaced quantity is fixed and doesn’t vary.
Pumping action is achieved by filling the gear enamel areas and transporting the fluid across the outer diameter of the gears. When the gear teeth mesh, the fluid is displaced and forced to the outlet aspect of the pump. The circulate fee can only be adjusted by growing or reducing the velocity at which the shaft is rotated. The pump selected offers precision grinding and lapping processes that result in a precision metering instrument, producing precise, pulse-less, and repeatable fluid circulate.
The pumps supply extraordinarily tight operating clearances to minimize fluid slip. Manufacturing tolerances on many components are to +/- 50 millionths of inch with floor finishes as smooth as four micro inches or higher. The pumps are provided with an AC “closed loop” motor velocity controller to hold up zero.1 p.c pump velocity accuracy.
The Zenith 9000 series pump is on the market in 11 sizes with capacities starting from .003 to 300 GPH. Wetted components can be found in through hardened 440C collection stainless-steel, specialty handled 316 stainless-steel, and high quality tool steels similar to D2, M2, M4 and CPM-M4 to provide good corrosion and abrasion resistance.
The bag manufacturer chosen a model with a magnetic drive (mag-drive) sealing possibility, which may eliminate shaft leakage of fluids, increasing plant security and decreasing volatile natural compound emissions. The use of a magnetic coupling also eliminates downtime because of mechanical seal failures and eliminates the necessity for buffer fluids.
New answer reduces prices and offers uniform perfume distribution
The new Zenith pump system gave the scented bag manufacturer a continuous, pulse free process, which guarantees equal and uniform fragrance distribution. By including the scent on to the baggage after leaving the extruder, the plastic bag manufacturer not solely eradicated the want to have separate pellet silos for every scent, but additionally eliminated the necessity to vent the fumes that come from the pellets as they travel from the silos to the extruders.
The producer purchased the primary system and after profitable trials, ordered six further systems. Over the past two years they’ve purchased more than 30 techniques, with plans to order extra. The manufacturer can be thinking about having Zenith conduct annual field calibrations of every system.
After two years of operation, the manufacturer estimates a yearly financial savings of approximately $480,000 per skid in operation. With 30 skids now operating, the return on investment for every system purchase may be measured in weeks. To date, there have been no odor complaints since the customer installed the Zenith techniques

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