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

Pump buy return on investment can be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A global producer of scented plastic rubbish bags was looking for an different 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 on the low move charges required, while additionally reducing their costs and improving worker health. Yearly financial savings are so high that the return on investment for the pump system can be measured in days.
Seeking an alternate for costly pre-scented plastic pellets
A world producer of scented plastic garbage bags was looking for an alternative alternative to the utilization 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 vehicles or rail automobiles and the manufacturer was experiencing logistical points related to keeping the silos stuffed. They additionally had to carry excessive prices for maintaining the inventory of the pre-scented pellets.
In addition, the heavily concentrated scents had been inflicting well being considerations for the workers who complained of complications. To mitigate this problem, 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 firm was seeking a means to use 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 build such a system in-house however had struggled to achieve accuracy and consistency at the low circulate charges they required. They decided to hunt a pump-based answer that would instantly spray fragrance on the warm melted sheet plastic because the in-house answer could not meet rigorous high quality control requirements requiring the spray-on scent to precisely match that of pre-scented pellets.
Finding ร้านซ่อมเครื่องวัดความดัน on a tradeshow ground
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 application consultants if the pumps might be a match with their software. After amassing info on the appliance, an area supervisor for the pump producer with intensive expertise in dosing and blending systems visited the plant to get a firsthand view of current operations and collect additional information.
Working with the pump manufacturer’s design group they developed a system resolution using a Zenith B-9000 Series rotary constructive displacement pump particularly designed for single stream chemical obligation applications. The pump features an accurate, repeatable, pulse free move in a compact design perfect for dosing components such as colours, flavors, and fragrances.
This sort of pump is outlined as rotary as a result of the drive shaft is rotated as compared to different kinds of pumps using a reciprocating motion and can be thought of to be a constructive displacement sort as a outcome of the displaced volume is fixed and doesn’t differ.
Pumping motion is achieved by filling the gear teeth 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 flow price can only be adjusted by rising or decreasing the velocity at which the shaft is rotated. The pump selected offers precision grinding and lapping processes that lead to a precision metering instrument, producing exact, pulse-less, and repeatable fluid move.
The pumps provide extraordinarily tight operating clearances to minimize fluid slip. Manufacturing tolerances on many parts are to +/- 50 millionths of inch with surface finishes as clean as 4 micro inches or better. The pumps are provided with an AC “closed loop” motor pace controller to take care of 0.1 p.c pump pace accuracy.
The Zenith 9000 sequence pump is out there in 11 sizes with capacities ranging from .003 to 300 GPH. Wetted elements are available in via hardened 440C sequence stainless steel, specialty handled 316 chrome steel, and high quality tool steels similar to D2, M2, M4 and CPM-M4 to offer good corrosion and abrasion resistance.
The bag producer chosen a model with a magnetic drive (mag-drive) sealing option, which may remove shaft leakage of fluids, increasing plant safety and lowering unstable 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 presents uniform fragrance distribution
The new Zenith pump system gave the scented bag producer a steady, pulse free process, which guarantees equal and uniform fragrance distribution. By including the scent on to the luggage after leaving the extruder, the plastic bag manufacturer not solely eradicated the need to have separate pellet silos for every 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 producer purchased the first system and after profitable trials, ordered six further techniques. Over the previous two years they have purchased greater than 30 systems, with plans to order extra. The manufacturer can be thinking about having Zenith conduct annual subject calibrations of every system.
After two years of operation, the manufacturer 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 could be measured in weeks. To date, there have been no odor complaints since the buyer put in the Zenith techniques

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