Pump purchase return on funding 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 garbage luggage was looking for an different selection 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 rates required, while additionally decreasing their prices and enhancing worker health. Yearly financial savings are so high that the return on investment for the pump system can be measured in days.
Seeking another for costly pre-scented plastic pellets
A international producer of scented plastic rubbish bags was looking for a substitute for the utilization of pre-scented plastic pellets, which required a devoted silo for every of the 20 out there fragrances. เครื่องมือที่ใช้วัดความดัน are pneumatically conveyed to each silo from both tanker vans or rail cars and the manufacturer was experiencing logistical issues related to keeping the silos crammed. They also had to carry excessive costs for sustaining the inventory of the pre-scented pellets.
In addition, the heavily concentrated scents had been inflicting health issues for the employees who complained of headaches. To mitigate this concern, 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 immediately after the extrusion process to reduce costs, 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 move charges they required. They determined to hunt a pump-based resolution that might directly spray fragrance on the warm melted sheet plastic because the in-house resolution 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 floor
Design engineers from the plastic bag manufacturer attending the PackExpo show noticed a working demonstration of precision gear metering pumps made by Zenith and asked application experts if the pumps may be a fit with their application. After accumulating info on the application, an space 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 info.
Working with the pump manufacturer’s design group they developed a system answer utilizing a Zenith B-9000 Series rotary optimistic displacement pump specifically designed for single stream chemical responsibility applications. The pump features an correct, repeatable, pulse free flow in a compact design best for dosing additives similar to colours, flavors, and fragrances.
This sort of pump is outlined as rotary as a end result of the drive shaft is rotated as compared to other forms of pumps utilizing a reciprocating motion and can additionally be thought-about to be a constructive displacement type as a result of the displaced volume is constant and does not differ.
Pumping motion is achieved by filling the gear teeth 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. The move price can only be adjusted by increasing or lowering the speed 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 circulate.
The pumps provide extraordinarily tight working clearances to minimize fluid slip. Manufacturing tolerances on many parts are to +/- 50 millionths of inch with surface finishes as easy as 4 micro inches or higher. The pumps are offered with an AC “closed loop” motor velocity controller to take care of zero.1 percent pump velocity accuracy.
The Zenith 9000 series pump is available in 11 sizes with capacities starting from .003 to 300 GPH. Wetted components are available in by way of hardened 440C sequence stainless-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 chosen a model with a magnetic drive (mag-drive) sealing choice, which might remove shaft leakage of fluids, increasing plant security and lowering risky natural compound emissions. The use of a magnetic coupling also eliminates downtime due to mechanical seal failures and eliminates the need for buffer fluids.
New resolution reduces prices and offers uniform fragrance distribution
The new Zenith pump system gave the scented bag manufacturer a continuous, pulse free process, which guarantees equal and uniform perfume distribution. By adding the scent directly to the baggage after leaving the extruder, the plastic bag producer not solely eliminated the need to have separate pellet silos for each scent, but additionally eradicated the want to vent the fumes that come from the pellets as they journey from the silos to the extruders.
The manufacturer purchased the primary system and after profitable trials, ordered six additional systems. Over the previous two years they have bought more than 30 methods, with plans to order more. The manufacturer can be interested in having Zenith conduct annual field calibrations of each 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 running, the return on investment for every system purchase may be measured in weeks. To date, there have been no odor complaints since the customer put in the Zenith techniques
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