Pump buy return on funding may be measured in days
By Mike Libbey, Area Sales Manager CIRCOR and Bob Limper, Business Development Manager CIRCOR
A global producer of scented plastic garbage bags was looking for an various selection 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 on the low move charges required, whereas additionally decreasing their prices and improving employee health. Yearly financial savings are so high that the return on investment for the pump system can be measured in days.
Seeking another for pricey pre-scented plastic pellets
A world producer of scented plastic garbage luggage was in search of an various alternative to the use of pre-scented plastic pellets, which required a dedicated silo for each of the 20 available fragrances. The pellets are pneumatically conveyed to each silo from both tanker vehicles or rail vehicles and the producer was experiencing logistical issues associated with preserving the silos filled. They also needed to carry high costs for sustaining the inventory of the pre-scented pellets.
In addition, the heavily concentrated scents had been causing health issues for the employees 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 company was in search of a method to use plain plastic pellets and apply scented oil directly to the plastic sheet instantly after the extrusion process to scale back costs, logistical challenges, and energy use. They had tried to build such a system in-house however had struggled to realize accuracy and consistency at the low flow charges they required. They determined to seek a pump-based resolution that might directly spray perfume on the warm melted sheet plastic as a end result of the in-house resolution couldn’t meet rigorous high quality management 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 producer attending the PackExpo show observed a working demonstration of precision gear metering pumps made by Zenith and requested utility experts if the pumps might be a match with their application. After accumulating เกจวัดแรงดันเชื้อเพลิง on the applying, an space supervisor for the pump producer with extensive experience in dosing and mixing systems visited the plant to get a firsthand view of current operations and collect additional information.
Working with the pump manufacturer’s design group they developed a system resolution utilizing a Zenith B-9000 Series rotary positive displacement pump specifically designed for single stream chemical responsibility purposes. The pump features an accurate, repeatable, pulse free flow in a compact design ideal for dosing additives similar to colors, flavors, and fragrances.
This kind of pump is defined as rotary because the drive shaft is rotated as compared to different types of pumps using a reciprocating movement and can additionally be thought-about to be a constructive displacement sort as a outcome of the displaced volume is fixed and does not range.
Pumping action is achieved by filling the gear tooth spaces and transporting the fluid around the outer diameter of the gears. When the gear enamel mesh, the fluid is displaced and compelled to the outlet side of the pump. The move rate can solely be adjusted by increasing or lowering the velocity at which the shaft is rotated. The pump chosen provides precision grinding and lapping processes that result in a precision metering instrument, producing exact, pulse-less, and repeatable fluid circulate.
The pumps provide extremely tight working clearances to attenuate fluid slip. Manufacturing tolerances on many parts are to +/- 50 millionths of inch with surface finishes as easy as 4 micro inches or better. The pumps are provided with an AC “closed loop” motor velocity controller to take care of zero.1 % pump pace accuracy.
The Zenith 9000 collection 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 handled 316 stainless-steel, and top quality tool steels corresponding to D2, M2, M4 and CPM-M4 to offer good corrosion and abrasion resistance.
The bag producer selected a mannequin with a magnetic drive (mag-drive) sealing possibility, which might remove shaft leakage of fluids, growing plant security and reducing unstable natural compound emissions. The use of a magnetic coupling additionally eliminates downtime due to mechanical seal failures and eliminates the need for buffer fluids.
New answer reduces costs and offers uniform perfume distribution
The new Zenith pump system gave the scented bag manufacturer a continuous, pulse free process, which ensures equal and uniform perfume distribution. By including the scent on to the bags after leaving the extruder, the plastic bag manufacturer not solely eradicated the need to have separate pellet silos for every scent, but also eradicated the want 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 profitable trials, ordered six further systems. Over เกจอาร์กอน have purchased more than 30 methods, with plans to order extra. The manufacturer is also excited about 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 working, the return on funding for each system purchase can be measured in weeks. To date, there have been no odor complaints because the customer put in the Zenith techniques