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

Pump buy return on funding can 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 baggage was on the lookout for an various alternative to using pre-scented plastic pellets. A serendipitous encounter at a tradeshow led them to a precision gear metering pump solution that gave them accuracy and consistency at the low flow charges required, whereas also decreasing their costs and enhancing worker health. Yearly savings are so high that the return on funding for the pump system may be measured in days.
Seeking an alternative for costly pre-scented plastic pellets
A global manufacturer of scented plastic rubbish baggage was looking for an various to using pre-scented plastic pellets, which required a dedicated silo for each of the 20 available fragrances. The pellets are pneumatically conveyed to each silo from either tanker trucks or rail automobiles and the producer was experiencing logistical points related to maintaining the silos filled. They also had to carry excessive prices for sustaining the inventory of the pre-scented pellets.
In addition, the closely concentrated scents had been inflicting health considerations for the employees who complained of headaches. To mitigate this issue, every extruder line was fitted with a vacuum exhaust hood to expel the fumes to the outside. On occasion, these emissions led to complaints from neighbors and citations from the United States Environmental Protection Agency.
The firm was seeking a method to make use of plain plastic pellets and apply scented oil directly to the plastic sheet immediately after the extrusion process to reduce back costs, logistical challenges, and energy use. They 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 resolution that might directly spray fragrance on the warm melted sheet plastic as a outcome of the in-house resolution couldn’t meet rigorous high quality control standards 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 producer attending the PackExpo present noticed a working demonstration of precision gear metering pumps made by Zenith and asked utility specialists if the pumps might be a fit with their application. After collecting information on the application, an area manager for the pump manufacturer with extensive expertise in dosing and mixing systems visited the plant to get a firsthand view of present operations and collect extra information.
Working with the pump manufacturer’s design group they developed a system solution using a Zenith B-9000 Series rotary optimistic displacement pump specifically designed for single stream chemical responsibility functions. The pump options an accurate, repeatable, pulse free flow in a compact design best for dosing additives such as colours, flavors, and fragrances.
This type of pump is defined as rotary because the drive shaft is rotated as compared to other types of pumps utilizing a reciprocating movement and is also considered to be a constructive displacement type because the displaced quantity is fixed and does not range.
Pumping action is achieved by filling the gear enamel spaces and transporting the fluid across the outer diameter of the gears. When the gear enamel mesh, the fluid is displaced and compelled to the outlet side of the pump. The flow fee can solely be adjusted by increasing or lowering the speed at which the shaft is rotated. ราคาเกจวัดแรงดัน chosen offers precision grinding and lapping processes that lead to a precision metering instrument, producing exact, pulse-less, and repeatable fluid move.
The pumps offer extremely tight working clearances to minimize fluid slip. Manufacturing tolerances on many parts are to +/- 50 millionths of inch with floor finishes as smooth as 4 micro inches or higher. The pumps are offered with an AC “closed loop” motor pace controller to take care of 0.1 % pump speed accuracy.
The Zenith 9000 series pump is out there 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 stainless-steel, and prime quality software steels similar to D2, M2, M4 and CPM-M4 to provide good corrosion and abrasion resistance.
The bag producer selected a model with a magnetic drive (mag-drive) sealing choice, which might get rid of shaft leakage of fluids, growing plant security and decreasing unstable natural compound emissions. The use of a magnetic coupling also eliminates downtime as a end result of mechanical seal failures and eliminates the need for buffer fluids.
New answer reduces costs and offers 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 directly to the baggage after leaving the extruder, the plastic bag manufacturer not solely eradicated the necessity to have separate pellet silos for each scent, but additionally eradicated the need 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 profitable trials, ordered six additional systems. Over the past two years they have bought more than 30 methods, 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 operating, the return on investment for each system purchase may be measured in weeks. To date, there have been no odor complaints because the buyer installed the Zenith methods
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