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 world producer of scented plastic rubbish luggage was in search of a substitute for the use of pre-scented plastic pellets. A serendipitous encounter at a tradeshow led them to a precision gear metering pump resolution that gave them accuracy and consistency on the low circulate rates required, whereas additionally decreasing their prices and improving worker well being. Yearly financial savings are so high that the return on funding for the pump system could be measured in days.
Seeking an alternate for expensive pre-scented plastic pellets
A world manufacturer of scented plastic garbage bags was looking for an alternative choice to the utilization of pre-scented plastic pellets, which required a dedicated silo for every of the 20 obtainable fragrances. The pellets are pneumatically conveyed to each silo from either tanker trucks or rail cars and the producer was experiencing logistical issues associated with maintaining the silos crammed. pressure gauge วัด แรง ดัน น้ำ needed to carry high prices for maintaining the stock of the pre-scented pellets.
In เพรสเชอร์เกจnuovafima , the closely concentrated scents had been causing well being issues for the employees who complained of complications. To mitigate this issue, each extruder line was fitted with a vacuum exhaust hood to expel the fumes to the outdoors. 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 use plain plastic pellets and apply scented oil directly to the plastic sheet instantly after the extrusion course of to cut back costs, logistical challenges, and energy use. They had tried to construct such a system in-house however had struggled to achieve accuracy and consistency at the low flow rates they required. They determined to hunt a pump-based resolution that could instantly spray fragrance on the good and cozy melted sheet plastic as a end result of the in-house solution couldn’t meet rigorous quality control requirements requiring the spray-on scent to precisely match that of pre-scented pellets.
Finding an answer on a tradeshow flooring
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 specialists if the pumps may be a fit with their utility. After collecting info on the appliance, an area supervisor for the pump producer with intensive experience in dosing and blending systems 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 resolution utilizing a Zenith B-9000 Series rotary constructive displacement pump specifically designed for single stream chemical obligation functions. The pump features an correct, repeatable, pulse free circulate in a compact design perfect for dosing components such as colours, flavors, and fragrances.
This type of pump is defined as rotary as a outcome of the drive shaft is rotated as in comparison with different kinds of pumps utilizing a reciprocating movement and is also thought-about to be a optimistic displacement type as a outcome of the displaced volume is constant 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 compelled to the outlet aspect of the pump. The circulate price can solely be adjusted by increasing or lowering the velocity at which the shaft is rotated. The pump selected presents precision grinding and lapping processes that end in a precision metering instrument, producing precise, pulse-less, and repeatable fluid circulate.
The pumps provide extraordinarily tight working clearances to attenuate fluid slip. Manufacturing tolerances on many components are to +/- 50 millionths of inch with surface finishes as clean as four micro inches or higher. The pumps are supplied with an AC “closed loop” motor pace controller to maintain zero.1 % pump velocity accuracy.
The Zenith 9000 collection pump is on the market in 11 sizes with capacities starting from .003 to 300 GPH. Wetted components can be found in through hardened 440C series stainless steel, specialty treated 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 producer selected a mannequin with a magnetic drive (mag-drive) sealing possibility, which can get rid of shaft leakage of fluids, growing plant security and lowering volatile organic compound emissions. The use of a magnetic coupling additionally eliminates downtime due to mechanical seal failures and eliminates the necessity for buffer fluids.
New answer reduces costs and offers uniform perfume distribution
The new Zenith pump system gave the scented bag producer 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 manufacturer not only eliminated the necessity to have separate pellet silos for every scent, but in addition eliminated the necessity to vent the fumes that come from the pellets as they travel from the silos to the extruders.
The manufacturer bought the primary system and after profitable trials, ordered six extra methods. Over the previous two years they have purchased more than 30 methods, with plans to order extra. The manufacturer can also be excited about having Zenith conduct annual subject calibrations of each system.
After two years of operation, the manufacturer estimates a yearly financial savings of approximately $480,000 per skid in operation. With 30 skids now running, the return on funding for every system buy can be measured in weeks. To date, there have been no odor complaints since the buyer installed the Zenith techniques

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