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Product Description
Walk through any plastics plant that handles powder — PVC resin, calcium carbonate, carbon black masterbatch, or any of the fine fillers that modern formulations demand — and the first thing you notice is the dust. It hangs in the air around the mixing station, settles in a grey film on machines and floors, and finds its way into lungs, bearings, and switch cabinets. It is not just untidy. It is a health hazard, a maintenance problem, and a quality risk all at once.
The dust comes from a simple workflow that has been repeated the same way for decades: an operator opens a 25 kg bag of PVC powder, lifts it over the mixer hopper, cuts the corner, and lets the powder fall. Some of it falls into the mixer. The rest drifts. A high-volume line with a high-speed mixer can consume hundreds of tons of powder per month — which means thousands of bags opened, thousands of pours, and a continuous cloud of fine dust around the process. The consequences accumulate:
Health: PVC powder, calcium carbonate, and carbon black are respiratory irritants. Chronic exposure in a dusty mixing room is a real occupational health concern that increasingly fails regulatory and insurance scrutiny.
Quality: Hand-dumping meters powder unevenly. One pour delivers 25 kg, the next 20, the next 27. For a formulation where calcium carbonate loading is specified at 40% by weight, that variance means every batch has a slightly different filler ratio — and slightly different mechanical properties, surface finish, and color.
Contamination: Open powder handling lets airborne dirt, tramp fiber, and other plant debris fall into the mix. For a PVC UV marble sheet making line or any product with a visible surface, a single spec of contamination is a rejected panel.
Cleanup: Dust that settles on floors and equipment must be swept, wiped, and vacuumed — labor that produces no product and must be repeated every shift.
Waste: Spilled powder is wasted material. Over a month, the invisible losses from a manual powder station can reach several percent of total powder consumption.
The engineering answer to all of this is pneumatic vacuum conveying — and specifically, for the plastics industry, a purpose-built powder suction machine. A CLF series powder suction machine replaces the operator-with-a-bag with a sealed, automated, self-cleaning system that draws powder through a closed pipe into the mixer or storage silo, filters the conveying air, and cleans its own filter — with no manual handling, no dust cloud, and no production interruption for filter maintenance.
The CLF series is the Chenxing powder conveying solution: a vacuum powder loader rated for up to 2000 kg/h, built around three defining features that appear on the machine itself — a customized filter cartridge, a reverse-pulse cleaning assembly, and a maintenance-free design. Together they deliver what every powder plant wants: dust-free, continuous, reliable powder feeding at full production speed.
A powder suction machine is, at its core, a vacuum cleaner scaled for industry — but with the intelligence and durability to run 24 hours a day in a production environment. The principle is simple; the engineering is where the value is built.
Vacuum Source (blower/venturi) ── negative pressure in the conveying line │ ▼ [1. Suction] ──── the intake gun/nozzle is inserted into the powder │ bag or storage hopper; fine powder is drawn into │ the conveying pipe by the air flow ▼ [2. Transport] ──── powder travels through a sealed pipe as a dilute │ phase suspension in air, at controlled velocity ▼ [3. Separation] ──── the powder/air mixture enters the separation │ chamber; powder drops out of the air stream by │ gravity and settles into the mixer or storage silo ▼ [4. Filtration] ──── the conveying air, now free of most powder, │ passes through the filter cartridge; remaining │ fine dust is captured on the filter surface ▼ [5. Reverse-Pulse Cleaning] ──── a timed reverse air pulse blasts │ the filter cartridge from the clean side, dislodging │ accumulated dust back into the process — no stopping, │ no manual cleaning ▼ [6. Exhaust] ──── clean air is exhausted back to the environment; │ only the powder remains, inside the process ▼ [Finished: powder delivered, dust contained, line keeps running]
1. The Vacuum Source — Where the Negative Pressure Comes From. A blower or venturi system generates negative pressure in the conveying line. The vacuum level is set by the conveying distance, the line diameter, and the powder's bulk density — for the short, high-volume runs typical of a mixer-feeding application, the machine is configured to deliver maximum throughput. The CLF series is rated for up to 2000 kg/h, sized to keep a large mixing station or extruder feed hopper constantly supplied.
2. Suction and Transport — Drawing the Powder In. The intake end — a flexible hose with a suction gun or a fixed pick-up point — is placed in the powder source: an opened bag, a gaylord box, a storage silo, or the discharge of a mill or pulverizer. The air flow carries the powder through the sealed pipe as a dilute-phase suspension. Because the entire path is closed, nothing escapes — the dust that used to fill the room stays inside the pipe.
3. Separation — Letting Gravity Do the Work. At the machine, the powder/air mixture enters a separation chamber where the air velocity drops. The powder — denser than air — falls out of suspension and settles into the destination: a high-speed mixer hopper, a storage silo, a screw feeder inlet, or directly into an extruder feed throat. This is where the machine earns its name: it is a powder suction machine, pulling material from where it is stored to where it is processed.
4. Filtration — The Customized Filter Cartridge. The conveying air, after losing most of its powder load in the separation chamber, still carries fine dust. This is what makes powder conveying different from pellet conveying: pellets are heavy and separate easily, but fine powder rides the air stream tenaciously. The CLF machine filters this air through a customized filter cartridge — a filter element selected for the specific powder being conveyed. The cartridge material, pore size, and filtration surface area are matched to the powder's particle size distribution, so:
PVC powder with its broad particle range is captured efficiently without blinding the filter;
calcium carbonate filler — very fine, abrasive, and high-volume — is filtered with a cartridge sized for its dust load;
carbon black and fine pigments — the finest, most difficult dusts — are contained completely, so no black haze escapes the process.
The customized cartridge is the difference between "conveying powder" and "conveying powder without leaking dust." It keeps the plant air clean, the powder in the process, and the machine running without premature filter clogging.
5. Reverse-Pulse Cleaning — The Self-Maintaining Filter. Over time, the dust captured on the filter cartridge surface builds into a cake that would eventually restrict air flow and reduce suction. On a conventional loader, this means stopping production, opening the machine, and manually cleaning or replacing the filter. The CLF machine eliminates this with its reverse-pulse cleaning assembly: at timed intervals, a short, sharp burst of compressed air is fired from the clean side of the cartridge, in the reverse direction to normal flow. The pulse flexes the filter media and dislodges the dust cake, which falls back into the separation chamber and the process below.
The result: the filter stays clear, suction stays strong, and the machine keeps conveying — automatically, around the clock, with zero production stops for filter maintenance.
6. Exhaust — Clean Air, Contained Powder. The filtered air is exhausted back to the plant — or to an external collection point — carrying essentially no powder. The dust that used to cloud the mixing room now stays inside the conveying circuit: captured on the filter, pulsed back into the process, and delivered to the mixer with the material it came from.
The CLF series powder suction machine is offered in a range of capacities to match production requirements, with the largest configuration rated for a maximum throughput of 2000 kg/h.
| Parameter | Value |
|---|---|
| Product series | CLF Series Powder Suction Machine |
| Maximum conveying capacity | Up to 2000 kg/h |
| Materials handled | PVC powder, calcium carbonate, carbon black, fine fillers, plastic powders |
| Filter type | Customized filter cartridge (matched to powder particle size) |
| Filter cleaning | Reverse-pulse cleaning assembly (automatic, timed) |
| Maintenance | Maintenance-free design (minimal wearing parts) |
| Conveying | Sealed vacuum (negative-pressure) conveying |
| Operation | Automatic, continuous |
Because powder conveying requirements vary widely — conveying distance, line routing, powder density, destination height, and duty cycle all influence the correct machine size — Chenxing sizes each CLF unit for the specific application. The CLF series is available in multiple capacities up to 2000 kg/h, with custom sizing on request. Tell our engineers your powder type, conveying distance, and required throughput, and we will specify the configuration — conveying line diameter, vacuum source, filter cartridge selection, and control mode — that fits your line.
Feature: The CLF machine is equipped with a filter cartridge customized for the specific powder being conveyed — filter media, pore size, and filtration surface selected according to the powder's particle size distribution.
Advantage: Different powders filter differently. Coarse PVC powder loads a filter slowly; fine calcium carbonate builds dust cake fast; carbon black is so fine it can blind standard filters in hours. A cartridge engineered for the actual material conveys longer between pulses, captures more dust, and resists blinding — instead of a one-size-fits-all element that compromises on every powder.
Benefit: Whatever you convey — PVC powder, calcium carbonate, carbon black, or other fine fillers — the filter keeps the fine dust where it belongs, out of the air and in the process. Higher filtration efficiency means a visibly cleaner plant, cleaner floors, cleaner machines, and no fine-powder haze escaping into the production hall or the operator's breathing zone.
Feature: A reverse-pulse cleaning assembly fires timed bursts of compressed air through the filter cartridge from the clean side, automatically dislodging accumulated dust.
Advantage: On a conventional loader, a clogged filter means stopping the line, opening the machine, and manually cleaning or replacing the element — typically 30-60 minutes of downtime per cleaning, repeated as often as the dust load demands. The CLF machine cleans itself in seconds, on a timer, while the line keeps running.
Benefit: Continuous production with zero filter-maintenance stops. The mixer never waits for the loader, the extruder never starves, and the shift's output never drops because of a blocked filter. For a plant running 24 hours, the eliminated downtime is worth real money.
Feature: The CLF loader is engineered for maintenance-free operation — simplified structure, minimal wearing parts, and no routine filter cleaning or element replacement cycles.
Advantage: Maintenance is the hidden tax on powder handling. Every time an operator has to clean a filter, change a worn part, or troubleshoot a dust leak, production stops and labor is consumed. The maintenance-free design removes these recurring tasks from the operating schedule.
Benefit: Lower labor cost, no unplanned stops, and no dependency on skilled technicians to keep the loader running. The machine runs reliably through the production week with routine checks only — which is exactly what a busy plant needs from a supporting component.
Feature: The CLF series is rated for a maximum conveying capacity of up to 2000 kg/h of powder.
Advantage: A large mixing station feeding multiple extruders — or a single high-output line like a PVC UV marble sheet making line consuming calcium carbonate at high rates — needs powder delivered faster than manual bag handling can supply. 2000 kg/h keeps the largest hoppers topped up in real time.
Benefit: The bottleneck at the powder feeding station disappears. The mixer runs at full speed, the formulation is always available, and production output is set by the process — not by how fast an operator can lift bags. For a plant planning capacity growth, the headroom is already there.
Feature: The CLF machine conveys powder through a fully sealed line under negative pressure, from the suction point to the discharge point.
Advantage: Negative pressure is inherently leak-proof — if a joint in the line is not perfectly sealed, air leaks in, not dust out. Unlike positive-pressure systems or open manual dumping, nothing escapes the conveying circuit.
Benefit: No powder dust in the air, no powder waste on the floor, and a plant that meets the dust and hygiene expectations of modern manufacturing. The material that used to be swept up and discarded now reaches the process — a direct saving on raw material cost.
Feature: The CLF loader can be integrated with the mixer or extruder control for automatic, on-demand feeding — suction starts when the hopper level falls, stops when it is full.
Advantage: Coordinated with a high-speed mixer or extruder feed system, the loader delivers powder exactly when the process needs it, in the quantity it needs, with no operator monitoring.
Benefit: Consistent, repeatable powder feeding batch after batch — the same filler ratio, the same mixer load, the same melt behavior. Process stability improves, operator attention is freed for other tasks, and the feeding step becomes a transparent part of the automated line.
Feature: The sealed, filtered conveying design produces dust-free operation at the powder handling station.
Advantage: The operator's job changes from standing in a dust cloud lifting bags to supervising a machine — a fundamentally different, safer, and more productive role.
Benefit: Better working conditions protect respiratory health and meet occupational health standards. The plant stays cleaner, so cleaning costs drop, sensitive equipment — bearings, switchgear, control cabinets — stays free of abrasive dust, and the whole facility operates more professionally.
Feature: The CLF machine is built with durable structure — available in carbon steel and stainless steel configurations for the contact and storage elements — to withstand the abrasion and corrosion of fine, high-load powders.
Advantage: Calcium carbonate and other mineral fillers are abrasive; conveying them at high velocity wears through lightweight components quickly. Carbon steel and stainless steel construction resists this wear, and stainless steel additionally resists corrosion where hygiene or moisture demands.
Benefit: A long, dependable service life even in the toughest powder duties. The machine is not a consumable — it is an asset that serves the line for years, which is the right economics for a component that runs every shift.
A powder suction machine does not work alone. It is one link in a powder handling chain that connects the mill, the storage, the mixer, and the extruder — and understanding where it sits makes its value clear.
[Mill / Pulverizer] → [Powder Storage Silos] → [CLF Powder Suction Machine] │ │ sealed vacuum conveying ▼ ▼ [Powder Production] [High-Speed Mixer / Storage Hopper] │ ▼ [Extruder / Pelletizing Line]
Step 1 — Powder Production. For plants that mill their own powder, a disc pulverizer or SMP knife pulverizer produces the fine powder that downstream processes consume. For other plants, powder arrives in bags or bulk from a compounder. Either way, the powder must get from its source to the mixer — and that transfer is the powder suction machine's job.
Step 2 — Conveying. The CLF machine draws powder from the storage silo, bag, or mill discharge and delivers it through a sealed line to the mixer hopper. Because the conveying is automatic and continuous, the mixer always has powder available — no waiting, no manual loading, no dust.
Step 3 — Mixing. The powder enters the high-speed mixer, where it is compounded with stabilizers, lubricants, fillers, and pigments into a homogeneous dry blend. Consistent feeding into the mixer is a prerequisite for consistent blending — a batch that receives its calcium carbonate all at once mixes differently from one that receives it gradually. The CLF machine's controlled, repeatable feeding supports uniform batch chemistry.
Step 4 — Extrusion. The dry blend moves to the extruder — a conical twin screw machine on a PVC UV marble sheet making line, or a pelletizing extruder on a PVC hot-cutting pelletizing line. Powder feeding directly into the extruder throat is another common CLF application, especially where the extruder runs the dry blend without pre-mixing.
The CLF powder suction machine is part of a complete material handling ecosystem that Chenxing supplies. Where pellets are the material, a screw feeder automatic feeding machine handles granule transfer — a complementary solution for the pellet side of the same line. Where moisture must be removed, a STG-U hopper drier plastic resin dryer conditions the material before processing. Where metal contamination is a concern, a CJ magnetic frame hopper magnet protects the process at the feed point. And where scrap and off-spec material return to the process, plastic crushers and the agglomerator film densifier handle recovery.
The distinction matters: pellets — heavy, free-flowing, easy to handle — are conveyed by screw feeders and standard loaders; powders — light, dusty, easy to lose and hard to contain — need a vacuum suction machine with proper filtration and self-cleaning. The CLF series is Chenxing's answer to the powder side of the equation, and it is designed to plug directly into the same material handling ecosystem as the rest of the line.
Yes — these are the two most common duties for the CLF series. PVC powder (suspension and emulsion grades) conveys well under vacuum because of its moderate bulk density, and calcium carbonate — the workhorse filler in PVC compounding — is handled routinely even though it is fine and abrasive. The key is the customized filter cartridge: the filter media and pore size are selected for the specific powder, so PVC powder filters without blinding, and fine calcium carbonate is captured without escaping into the air. If you convey other powders — carbon black, pigments, talc, or specialty fillers — tell us the material and particle size, and the CLF is configured accordingly.
No — that is the point of the reverse-pulse design. At timed intervals, a short burst of compressed air is fired through the filter cartridge from the clean side, in the reverse direction to normal conveying flow. The pulse flexes the filter media and knocks the accumulated dust cake loose, and the dislodged dust falls back into the separation chamber and down into the process. The whole cleaning cycle takes seconds, happens automatically while the machine keeps conveying, and requires no operator action and no production stop. Conventional loaders that must be opened and manually cleaned lose 30-60 minutes per cleaning; the CLF machine never does.
The CLF machine's sealed conveying and filter-contained design is well suited to fine-particle materials, and stainless steel construction is available where hygiene, corrosion resistance, or product purity demands it. For fine particles — carbon black, fine pigments, precipitated fillers — the customized filter cartridge is precisely the feature that keeps the ultra-fine dust contained instead of exhausting it into the plant. For food-grade or pharmaceutical-grade powders, confirm your material, hygiene requirements, and any applicable standards with our engineers, and the CLF can be specified with the appropriate materials and filtration grade for your application.
Effectively none. The CLF machine conveys under negative pressure through a sealed line, and negative pressure is inherently leak-proof — at any imperfect joint, air leaks in rather than dust leaking out. The conveying air is filtered through the customized filter cartridge before exhaust, so the air returned to the plant carries no visible dust. This is the defining difference between the CLF vacuum loader and open, manual powder handling: the dust cloud around the mixing station is eliminated, the floor stays clean, and the operator's breathing zone stays clear. Where full dust containment to strict environmental or hygiene standards is required, the exhaust can be routed to a central collection point.
The right size depends on four factors: the powder type (its bulk density and flow characteristics), the conveying distance and height, the required throughput, and the duty cycle. The CLF series is available in multiple capacities up to 2000 kg/h, with custom sizing on request. As a practical guide: measure your mixer or extruder's powder consumption per hour, add a safety margin for peak demand, and account for the conveying distance — longer, higher, or narrower runs require more vacuum power. Chenxing engineers size the complete system — conveying line diameter, vacuum source, filter cartridge, and controls — from your production data, so the machine matches the line rather than the other way around.
Yes. The CLF loader is designed for automatic, on-demand feeding: it can be interlocked with the mixer's or extruder's control so that suction starts when the hopper level drops below the set point and stops when it is full. In this mode, the powder supply is fully automatic — the mixer always has material, the extruder never starves, and no operator needs to watch the powder station. The loader integrates naturally with a high-speed mixer feeding system and with extruder feed hoppers, and Chenxing provides the control interface to connect it to your existing line control.
The CLF series is built around a maintenance-free design — this is one of its three defining features. Because the reverse-pulse assembly cleans the filter automatically, there is no routine filter cleaning to schedule and no element replacement cycle to budget for. The structure uses minimal wearing parts, and the robust carbon-steel or stainless-steel construction resists the abrasion of fine, high-load powders. Maintenance is limited to routine checks — confirming the compressed-air supply to the cleaning assembly, inspecting the conveying line connections, and verifying the vacuum source — on the same schedule as the rest of the line. The machine is designed to run shift after shift with the minimum of attention.
Step 1 — Tell Us Your Powder and Your Process: Share the powder type (PVC powder, calcium carbonate, carbon black, or other), the particle size if you know it, your required throughput, and the conveying distance from source to destination. If the loader feeds a high-speed mixer or extruder, tell us the consumption rate and hopper size — our engineers will match the CLF capacity to your demand.
Step 2 — Get a Sized Recommendation: Chenxing specifies the complete system: CLF capacity (from the range up to 2000 kg/h), conveying line diameter and routing, vacuum source, the customized filter cartridge matched to your powder, and the control mode (manual or automatic on-demand). You receive a clear equipment list, layout drawing, and utility requirements — no guesswork, no oversized or undersized machine.
Step 3 — Request a Quote from Nicole: Contact Nicole at +8615951187228 or ceo@cxsljx.com with your powder details and plant layout. We respond within 24 hours with a formal quotation, delivery schedule, and freight options. Chenxing provides installation guidance, commissioning support, and operator training on the suction, separation, filtration, and reverse-pulse cleaning operation.
Step 4 — Convey Powder, Dust-Free, from Day One: After installation, the CLF loader starts pulling powder through its sealed line immediately — dust contained, filter self-cleaning, feed automatic. Your mixing station operates without the dust cloud, the formulation is consistent batch after batch, and powder handling stops being a bottleneck and becomes a background process that just works.
For the complete powder and material handling ecosystem, Chenxing also supplies: screw feeders / automatic feeding machines for pellet conveying, STG-U hopper driers for moisture control, PVC disc pulverizers and SMP PVC waste pulverizers for powder production, parallel co-rotating twin screw extruders for compounding, plastic pelletizers for reprocessing, vibrating screens for classification, SML air-cooled chillers for process cooling, and complete lines from PVC shelf label strip extrusion to PVC UV marble sheet making. As a single-source partner, Chenxing Machinery supports every step from powder to finished product.
Contact Chenxing Machinery Today:
Contact Person: Nicole
Phone / WhatsApp: +8615951187228
Email: ceo@cxsljx.com
Company: Zhangjiagang Chenxing Machinery Co., Ltd.
Website: www.chenxingmachinery.com
