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

Pump buy return on investment could be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A international producer of scented plastic rubbish baggage was in search of an various to 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 charges required, while also lowering their prices and enhancing employee well being. Yearly savings are so excessive that the return on investment for the pump system can be measured in days.
Seeking an alternate for costly pre-scented plastic pellets
A global manufacturer of scented plastic garbage baggage was looking for a substitute for the use of pre-scented plastic pellets, which required a dedicated silo for each of the 20 obtainable fragrances. The pellets are pneumatically conveyed to every silo from either tanker vans or rail cars and the producer was experiencing logistical points associated with preserving the silos crammed. They additionally had to carry excessive costs for sustaining the inventory of the pre-scented pellets.
In addition, the closely concentrated scents had been inflicting well being 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 event, these emissions led to complaints from neighbors and citations from the United States Environmental Protection Agency.
The company was seeking a method to make use of plain plastic pellets and apply scented oil on to the plastic sheet instantly after the extrusion course of to reduce prices, logistical challenges, and power use. They had tried to construct such a system in-house however had struggled to realize accuracy and consistency on the low move rates they required. They decided to seek a pump-based resolution that could immediately spray fragrance on the warm melted sheet plastic because the in-house solution could not meet rigorous high quality control standards requiring the spray-on scent to exactly match that of pre-scented pellets.
Finding an answer on a tradeshow floor
Design engineers from the plastic bag producer attending the PackExpo present noticed a working demonstration of precision gear metering pumps made by Zenith and requested utility experts if the pumps could be a fit with their utility. After accumulating info on the applying, an space manager for the pump manufacturer with intensive experience in dosing and mixing techniques visited the plant to get a firsthand view of present operations and collect further info.
Working with the pump manufacturer’s design group they developed a system solution using a Zenith B-9000 Series rotary constructive displacement pump specifically designed for single stream chemical responsibility applications. The pump features an correct, repeatable, pulse free circulate in a compact design perfect for dosing components such as colors, flavors, and fragrances.
This type of pump is defined as rotary as a end result of the drive shaft is rotated as in comparability with other types of pumps utilizing a reciprocating movement and is also thought of to be a constructive displacement kind as a end result of the displaced quantity is fixed and doesn’t differ.
Pumping motion is achieved by filling the gear enamel spaces and transporting the fluid around the outer diameter of the gears. When the gear teeth mesh, the fluid is displaced and compelled to the outlet facet of the pump. เกจแรงดัน can only be adjusted by rising or lowering the pace at which the shaft is rotated. The pump selected offers precision grinding and lapping processes that result in a precision metering instrument, producing exact, pulse-less, and repeatable fluid circulate.
The pumps offer extremely tight operating clearances to reduce fluid slip. Manufacturing tolerances on many parts are to +/- 50 millionths of inch with surface finishes as smooth as 4 micro inches or better. The pumps are supplied with an AC “closed loop” motor pace controller to take care of zero.1 % pump velocity accuracy.
The Zenith 9000 sequence pump is on the market in 11 sizes with capacities ranging from .003 to 300 GPH. Wetted elements can be found in by way of hardened 440C sequence chrome steel, specialty handled 316 chrome steel, and top quality tool steels similar to D2, M2, M4 and CPM-M4 to provide good corrosion and abrasion resistance.
The bag manufacturer selected a mannequin with a magnetic drive (mag-drive) sealing option, which can get rid of shaft leakage of fluids, increasing plant safety and decreasing risky natural compound emissions. The use of a magnetic coupling additionally eliminates downtime because of mechanical seal failures and eliminates the need for buffer fluids.
เกจวัดแรงดัน4บาร์ reduces costs and offers uniform perfume distribution
The new Zenith pump system gave the scented bag manufacturer a continuous, pulse free process, which ensures equal and uniform fragrance distribution. By including the scent on to the luggage after leaving the extruder, the plastic bag manufacturer not only eliminated the need to have separate pellet silos for each scent, but also eradicated the need to vent the fumes that come from the pellets as they journey from the silos to the extruders.
The manufacturer purchased the first system and after profitable trials, ordered six further techniques. Over the previous two years they have purchased more than 30 systems, with plans to order extra. The producer can also be interested in having Zenith conduct annual field calibrations of every system.
After two years of operation, the producer estimates a yearly financial savings of roughly $480,000 per skid in operation. With 30 skids now working, the return on investment for every system buy can be measured in weeks. To date, there have been no odor complaints because the buyer put in the Zenith techniques

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