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

Pump purchase return on funding could be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A international manufacturer of scented plastic rubbish bags was on the lookout for an various to the use of 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 additionally lowering their prices and enhancing employee health. Yearly savings are so high that the return on investment for the pump system could be measured in days.
Seeking another for expensive pre-scented plastic pellets
A international producer of scented plastic garbage bags was looking for an various to using pre-scented plastic pellets, which required a dedicated silo for every of the 20 available fragrances. The pellets are pneumatically conveyed to every silo from both tanker vehicles or rail vehicles and the manufacturer was experiencing logistical points associated with keeping the silos filled. They additionally needed to carry high prices for maintaining the stock of the pre-scented pellets.
In addition, the heavily concentrated scents had been causing well being issues for the workers who complained of headaches. To mitigate this problem, 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 method to make use of plain plastic pellets and apply scented oil directly to the plastic sheet instantly after the extrusion course of to reduce back costs, logistical challenges, and power 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 answer that could instantly spray fragrance on the good and cozy melted sheet plastic because the in-house answer could not meet rigorous quality management standards requiring the spray-on scent to exactly match that of pre-scented pellets.
Finding an answer 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 requested software specialists if the pumps might be a match with their application. After amassing information on the appliance, an space supervisor for the pump producer with extensive experience in dosing and blending methods visited the plant to get a firsthand view of current operations and gather further information.
Working with the pump manufacturer’s design group they developed a system solution using a Zenith B-9000 Series rotary positive displacement pump particularly designed for single stream chemical obligation functions. The pump features an accurate, repeatable, pulse free flow in a compact design perfect for dosing components corresponding to colours, flavors, and fragrances.
This kind of pump is outlined as rotary as a end result of the drive shaft is rotated as compared to different forms of pumps using a reciprocating motion and can be thought of to be a constructive displacement sort because the displaced quantity is constant and doesn’t vary.
Pumping action is achieved by filling the gear tooth spaces and transporting the fluid across the outer diameter of the gears. When เครื่องมือวัดความดัน , the fluid is displaced and compelled to the outlet facet of the pump. The move rate can only be adjusted by growing or reducing the pace at which the shaft is rotated. The pump chosen offers precision grinding and lapping processes that end in a precision metering instrument, producing exact, pulse-less, and repeatable fluid move.
The pumps provide extremely tight operating clearances to attenuate fluid slip. Manufacturing tolerances on many elements are to +/- 50 millionths of inch with floor finishes as clean as 4 micro inches or higher. The pumps are offered with an AC “closed loop” motor pace controller to take care of zero.1 % pump pace accuracy.
The Zenith 9000 sequence pump is out there in eleven sizes with capacities ranging from .003 to 300 GPH. Wetted components are available in through hardened 440C collection chrome 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 mannequin with a magnetic drive (mag-drive) sealing possibility, which may get rid of shaft leakage of fluids, increasing plant safety and reducing volatile natural compound emissions. The use of a magnetic coupling also eliminates downtime as a outcome of mechanical seal failures and eliminates the need for buffer fluids.
New solution reduces prices and offers uniform perfume distribution
The new Zenith pump system gave the scented bag manufacturer a steady, pulse free course of, which guarantees equal and uniform fragrance distribution. By adding the scent on to the bags after leaving the extruder, the plastic bag producer not solely eradicated the necessity to have separate pellet silos for every scent, but also eradicated the want to vent the fumes that come from the pellets as they journey from the silos to the extruders.
The producer purchased the primary system and after successful trials, ordered six additional systems. Over the past two years they have purchased more than 30 systems, with plans to order more. The producer can additionally be excited about having Zenith conduct annual area calibrations of each system.
After เครื่องมือวัดpressure of operation, the producer estimates a yearly financial savings of approximately $480,000 per skid in operation. With 30 skids now operating, the return on funding for every system buy can be measured in weeks. To date, there have been no odor complaints for the explanation that customer put in the Zenith techniques

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