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

Pump buy return on investment could 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 on the lookout for an various to using 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 at the low circulate charges required, while also lowering their prices and improving worker well being. Yearly savings are so high that the return on funding for the pump system could be measured in days.
Seeking an alternate for pricey pre-scented plastic pellets
A global producer of scented plastic rubbish bags was on the lookout for an alternative to the use of pre-scented plastic pellets, which required a dedicated silo for each of the 20 out there fragrances. The pellets are pneumatically conveyed to every silo from either tanker vans or rail vehicles and the manufacturer was experiencing logistical points associated with maintaining the silos filled. They also needed to carry excessive prices for sustaining the inventory of the pre-scented pellets.
In addition, the closely concentrated scents had been causing well being concerns for the employees who complained of headaches. To mitigate this problem, each extruder line was fitted with a vacuum exhaust hood to expel the fumes to the outside. On occasion, these emissions led to complaints from neighbors and citations from the United States Environmental Protection Agency.
ความหมายของเครื่องวัดความดัน was looking for a method to make use of plain plastic pellets and apply scented oil on to the plastic sheet immediately after the extrusion course of to cut back costs, logistical challenges, and vitality use. They had tried to construct such a system in-house but had struggled to achieve accuracy and consistency on the low flow rates they required. They determined to hunt a pump-based answer that could instantly spray perfume on the good and cozy melted sheet plastic as a end result of the in-house answer 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 floor
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 software specialists if the pumps might be a match with their utility. After collecting data on the applying, an space manager for the pump producer with in depth expertise in dosing and blending methods visited the plant to get a firsthand view of present operations and collect additional information.
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 duty functions. เกจวัดแรงกด features an correct, repeatable, pulse free flow in a compact design ideal for dosing components such as colours, flavors, and fragrances.
This type of pump is outlined as rotary as a end result of the drive shaft is rotated as in comparison with different kinds of pumps using a reciprocating movement and can be thought of to be a constructive displacement type because the displaced quantity is fixed and does not vary.
Pumping action 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 aspect of the pump. The circulate rate can only be adjusted by increasing or lowering the pace at which the shaft is rotated. The pump chosen presents precision grinding and lapping processes that end in a precision metering instrument, producing exact, pulse-less, and repeatable fluid circulate.
The pumps provide extremely tight working clearances to reduce fluid slip. Manufacturing tolerances on many parts are to +/- 50 millionths of inch with surface finishes as clean as 4 micro inches or better. The pumps are offered with an AC “closed loop” motor velocity controller to hold up zero.1 p.c pump pace accuracy.
The Zenith 9000 sequence pump is out there in eleven sizes with capacities starting from .003 to 300 GPH. Wetted elements are available in through hardened 440C series stainless-steel, specialty handled 316 stainless-steel, and high quality software steels corresponding 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 may eliminate shaft leakage of fluids, increasing plant security and reducing volatile organic compound emissions. The use of a magnetic coupling also eliminates downtime as a end result of mechanical seal failures and eliminates the need for buffer fluids.
New answer reduces costs and provides uniform fragrance distribution
The new Zenith pump system gave the scented bag manufacturer a steady, pulse free course of, which guarantees equal and uniform fragrance distribution. By adding the scent directly to the baggage after leaving the extruder, the plastic bag producer not solely eliminated the necessity to have separate pellet silos for every 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 producer bought the primary system and after profitable trials, ordered six extra techniques. Over the previous two years they’ve bought more than 30 systems, with plans to order extra. The manufacturer can be thinking about having Zenith conduct annual subject calibrations of each system.
After two years of operation, the producer estimates a yearly savings of roughly $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 customer put in the Zenith techniques
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