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Pump buy return on funding can be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A international producer of scented plastic garbage luggage was in search of an alternative to the use 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 prices and improving worker health. Yearly financial savings are so high that the return on funding for the pump system could be measured in days.
Seeking an alternative for pricey pre-scented plastic pellets
A world manufacturer of scented plastic rubbish baggage was looking for an alternative to using pre-scented plastic pellets, which required a devoted silo for every of the 20 obtainable fragrances. The pellets are pneumatically conveyed to every silo from both tanker trucks or rail vehicles and the manufacturer was experiencing logistical issues related to preserving the silos crammed. They also needed to carry high costs for sustaining the inventory of the pre-scented pellets.
In addition, the closely concentrated scents had been inflicting health considerations for the workers who complained of headaches. To mitigate this issue, 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 looking for a means to make use of plain plastic pellets and apply scented oil on to the plastic sheet instantly after the extrusion course of to scale back costs, logistical challenges, and energy use. They had tried to construct such a system in-house however had struggled to attain accuracy and consistency on the low flow rates they required. They decided to hunt a pump-based resolution that might instantly spray fragrance on the warm melted sheet plastic as a result of the in-house answer couldn’t meet rigorous high quality management standards 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 noticed a working demonstration of precision gear metering pumps made by Zenith and asked utility consultants if the pumps might be a fit with their application. After accumulating information on the appliance, an space manager for the pump producer with extensive expertise in dosing and blending techniques visited the plant to get a firsthand view of present operations and gather additional info.
Working with the pump manufacturer’s design group they developed a system solution utilizing a Zenith B-9000 Series rotary optimistic displacement pump specifically designed for single stream chemical obligation applications. The pump options an correct, repeatable, pulse free flow in a compact design ideal for dosing components similar to colours, flavors, and fragrances.
This kind of pump is outlined as rotary as a outcome of the drive shaft is rotated as compared to other kinds of pumps utilizing a reciprocating movement and can be thought of to be a positive displacement sort because the displaced volume is constant and doesn’t differ.
Pumping motion is achieved by filling the gear tooth spaces 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 facet of the pump. The flow price can only be adjusted by rising or lowering the speed at which the shaft is rotated. The pump selected offers precision grinding and lapping processes that end in a precision metering instrument, producing precise, pulse-less, and repeatable fluid flow.
The pumps offer extraordinarily tight operating clearances to reduce fluid slip. Manufacturing tolerances on many parts 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 take care of zero.1 p.c pump speed accuracy.
The Zenith 9000 sequence pump is available in 11 sizes with capacities ranging from .003 to 300 GPH. Wetted components are available in through hardened 440C collection stainless-steel, specialty treated 316 stainless-steel, and prime quality software steels such as D2, M2, M4 and CPM-M4 to offer good corrosion and abrasion resistance.
The bag producer chosen a mannequin with a magnetic drive (mag-drive) sealing option, which may remove shaft leakage of fluids, increasing plant security and reducing unstable organic compound emissions. The use of a magnetic coupling also eliminates downtime because of mechanical seal failures and eliminates the necessity for buffer fluids.
New solution reduces costs and offers uniform fragrance distribution
The new Zenith pump system gave the scented bag producer a steady, 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 manufacturer not only eliminated the want to have separate pellet silos for every scent, but additionally 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 successful trials, ordered six additional methods. Over the past two years they have bought more than 30 methods, with plans to order extra. The manufacturer can be thinking about having Zenith conduct annual area calibrations of each system.
After two years of operation, the producer estimates a yearly financial savings of approximately $480,000 per skid in operation. With เกจวัดความดันน้ำ running, the return on investment for each system buy can be measured in weeks. To date, there have been no odor complaints because the buyer put in the Zenith methods
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