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

Pump buy return on investment may be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A world manufacturer of scented plastic garbage luggage was looking for an various to the usage of 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, while additionally decreasing their costs and improving employee well being. Yearly financial savings are so excessive that the return on investment for the pump system may be measured in days.
Seeking an alternate for expensive pre-scented plastic pellets
A international manufacturer of scented plastic rubbish baggage was in search of a substitute for the usage of pre-scented plastic pellets, which required a dedicated silo for each of the 20 obtainable fragrances. The pellets are pneumatically conveyed to each silo from either tanker trucks or rail vehicles and the producer was experiencing logistical points associated with preserving the silos crammed. They additionally needed to carry high prices for maintaining the inventory 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 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 way to make use of plain plastic pellets and apply scented oil on to the plastic sheet immediately after the extrusion course of to reduce costs, logistical challenges, and power use. They had tried to build such a system in-house but had struggled to attain accuracy and consistency at the low flow rates they required. They determined to seek a pump-based resolution that would immediately spray fragrance on the good and cozy melted sheet plastic as a result of the in-house solution could not meet rigorous high quality control requirements requiring the spray-on scent to exactly match that of pre-scented pellets.
Finding a solution on a tradeshow ground
Design engineers from the plastic bag manufacturer attending the PackExpo show noticed a working demonstration of precision gear metering pumps made by Zenith and requested software experts if the pumps could be a fit with their application. After collecting เกจวัดแรงดันเชื้อเพลิง on the application, an area manager for the pump manufacturer with extensive experience in dosing and blending systems visited the plant to get a firsthand view of current operations and gather additional info.
Working with the pump manufacturer’s design group they developed a system resolution using a Zenith B-9000 Series rotary optimistic displacement pump particularly designed for single stream chemical obligation applications. The pump features an accurate, repeatable, pulse free flow in a compact design perfect for dosing components such as colours, flavors, and fragrances.
This kind of pump is defined as rotary as a result of the drive shaft is rotated as in comparison with other kinds of pumps utilizing a reciprocating movement and is also thought of to be a optimistic displacement type because the displaced quantity is fixed and doesn’t range.
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 compelled to the outlet aspect of the pump. The flow price can solely be adjusted by growing or lowering 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 exact, pulse-less, and repeatable fluid move.
The pumps provide extremely tight operating clearances to reduce fluid slip. Manufacturing tolerances on many elements are to +/- 50 millionths of inch with surface finishes as smooth as four micro inches or better. The pumps are offered with an AC “closed loop” motor speed controller to maintain zero.1 p.c pump velocity accuracy.
The Zenith 9000 collection pump is available in eleven sizes with capacities starting from .003 to 300 GPH. Wetted parts are available in by way of hardened 440C series stainless steel, specialty handled 316 stainless-steel, and high quality tool steels such as D2, M2, M4 and CPM-M4 to supply good corrosion and abrasion resistance.
The bag manufacturer selected a mannequin with a magnetic drive (mag-drive) sealing choice, which can get rid of shaft leakage of fluids, increasing plant safety and decreasing unstable organic compound emissions. The use of a magnetic coupling additionally eliminates downtime due to mechanical seal failures and eliminates the need for buffer fluids.
New solution reduces prices and offers uniform fragrance distribution
The new Zenith pump system gave the scented bag manufacturer a steady, pulse free process, which guarantees equal and uniform perfume distribution. By adding เพรสเชอร์เกจไฮดรอลิค on to the bags after leaving the extruder, the plastic bag producer not only eliminated the necessity to have separate pellet silos for each scent, but also 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 successful trials, ordered six extra methods. Over the past two years they have purchased greater than 30 systems, with plans to order extra. The producer can also be excited about having Zenith conduct annual field calibrations of every system.
After two years of operation, the producer estimates a yearly financial savings of approximately $480,000 per skid in operation. With 30 skids now working, the return on funding for each system buy could be measured in weeks. To date, there have been no odor complaints for the explanation that buyer put in the Zenith systems

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