Premade Bag Powder Packing Machine
SW-L200 · SW-L250 · SW-L320
Automated rotary filling for powder products in premade pouches — flour, spice, coffee, milk powder, and more. Auger screw filler ensures accurate dosing for fine and ultra-fine powders. Three models share the same platform; pick by bag width only.
Quality
CE Certified
Source
Factory Direct · Guangdong
Customization
OEM · Voltage · Language
After-Sales
2-Year Warranty · Lifetime Remote Support
SW-L Series: 8-Station Rotary Auger Powder Filler
The SW-L series fills pre-formed pouches with powder products on an 8-station rotary carousel. Each station performs one step — bag loading, opening, filling, sealing, cooling, coding, detection, and discharge — all running simultaneously so throughput stays high even at large bag sizes.
A servo-driven auger screw filler (standard) meters each portion volumetrically with ±1 g accuracy for fills under 100 g. All product-contact surfaces are SUS304 stainless steel. The PLC + HMI touch screen stores multiple product recipes and supports stand-up, flat, zipper, 3-side seal, 4-side seal, gusset, and flat-bottom (8-side seal) pouches. Switching between plain and zipper bags of the same size is done on the touch screen by turning the optional zipper-opening device on or off.
Packing Speed
16–50 bags / min
Fill Weight Range
30–5,000 g
Dosing Accuracy
±1% (±1 g below 100 g)
| Parameter | SW-L200 | SW-L250 | SW-L320 |
|---|---|---|---|
| Bag Width | 80–200 mm | 110–250 mm | 180–320 mm |
| Bag Length | 100–350 mm | ||
| Fill Weight Range | 30–5,000 g | ||
| Dosing Accuracy | ±1 g (≤100 g) / ±1% (>100 g) | ||
| Packing Speed | 16–50 bags / min | ||
| Stations | 8 (rotary carousel) | ||
| Bag Formats | Stand-Up / Flat / Zipper / 3-Side Seal / 4-Side Seal / Gusset / Flat-Bottom (8-Side Seal) | ||
| Filling System | Servo-driven auger screw filler (std) · Dual-auger (opt for high-speed) | ||
| Control | Industrial PLC + HMI Touch Screen · recipe storage | ||
| Contact Material | SUS304 Stainless Steel | ||
| Power | 2.3–7.5 kW · 380V/220V · 50/60 Hz (customizable) | ||
| Air | 0.6–1.2 m³/min | ||
| Weight | SW-L200: ~1,800 kg | ||
| Dimensions (L×W×H) | SW-L200: 3,400 × 2,820 × 2,500 mm | ||
SW-L200 · 80–200 mm — small sachets, portion packs
SW-L250 · 110–250 mm — standard retail pouches
SW-L320 · 180–320 mm — bulk, family-size
Recommended Configurations by Product
Each scenario below shows an example configuration. Actual throughput varies by powder density, flow characteristics, and bag format — contact us for a capacity estimate based on your specific product. For how flow characteristics and bag format shape the whole line, see powder packaging line planning.
Spice & Seasoning
500 g stand-up pouch for retail
- Model
- SW-L250
- Filler
- Single auger screw
- Clients
- Spice brands, seasoning processors, condiment exporters
Coffee Powder
250 g zipper pouch with nitrogen flush
- Model
- SW-L250
- Filler
- Single auger screw
- Add-ons
- Nitrogen flushing, one-way degassing valve applicator
Supplement Powder
100 g flat pouch for veterinary / health supplements
- Model
- SW-L200
- Filler
- Single auger screw (fine pitch)
Flour & Milk Powder
1 kg gusset pouch for bulk retail
- Model
- SW-L320
- Filler
- Dual auger screw (coarse + fine dosing)
- Clients
- Flour mills, dairy processors
The SW-L series is designed for powder and fine granule products only. For free-flowing dry granules, see the SW-D series. For liquids, see the SW-Y series.
Supported Pouch Types & How to Choose
The SW-L series handles all common premade pouch formats — stand-up, flat, zipper, 3-side seal, 4-side seal, gusset, and flat-bottom (8-side seal). Because the pouches arrive pre-formed, the machine only seals the top opening, so 4-side seal and flat-bottom (8-side seal) bags run without any additional sealing station. Switching between plain and zipper bags of the same size is done on the HMI by turning the optional zipper-opening device on or off. A change to a different bag size means adjusting the grippers and bag magazine; the time it takes depends on the bag format and machine setup. For powder products, we recommend pouches with heat-seal closures; zipper pouches are ideal for resealable consumer packaging.
Stand-Up Pouch — best shelf display, ideal for spice and coffee powder
Gusset Pouch — extra volume for light, fluffy powders
Flat-Bottom Pouch — premium look, maximum volume
3-Side Seal — simple, lowest material cost for sachets
Stand-Up Pouch
Gusset Pouch
3-Side Seal
4-Side Seal
Fin Seal
Pouch material: Pre-made pouches with their own laminated structure and heat-seal layer (laminated film, laminated paper or aluminum foil composite) — send us your bag sample or artwork for compatibility confirmation.
How the 8-Station Rotary Cycle Works
All stations run simultaneously — while one pouch is being filled, others are being loaded, sealed, and discharged in parallel.
01
Load & Open
Suction cups pick premade pouches from the magazine onto rotary gripper clamps. A second set of suction cups separates the panels; an air jet inflates the bag fully open. Sensors skip any failed opens automatically.
02
Auger Fill
The servo-driven auger screw filler rotates a calibrated number of turns to dispense the target weight into the open pouch. An optional dust collector at the filling station captures airborne particles to keep the seal area clean and prevent contamination.
03
Seal & Cool
Heated jaws close the bag mouth under controlled pressure — temperature, dwell time, and pressure are adjustable per film type. Cooling plates solidify the seal before release.
04
Code & Discharge
Optional date coder prints batch info on the finished pouch. Gripper clamps release onto the outfeed conveyor. With the optional checkweigher and reject unit, underweight bags are rejected automatically.
Gallery & Video
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❯
Top view — auger screw filler hopper and 8-station rotary carousel
- Top view — auger screw filler hopper and 8-station rotary carousel
- Rotary carousel filling spice powder pouch — gripper clamps hold bag open during auger fill
- Bag opening station — suction cups separate panels, air jet inflates bag fully open
- Factory floor view — 8-station rotary platform with outfeed conveyor and bag magazine
- Bag magazine — premade pouches stacked and picked by suction cups onto rotary gripper clamps
- Gripper clamp holding filled spice pouch — ready for heat sealing
- Heat-sealing jaws close-up — aluminum seal bars apply controlled pressure and temperature
- Date coding station — filled pouch receives batch number and expiry date before discharge
- Finished pouch on vibration platform — settles powder before outfeed conveyor
- Key components: bag groove, zipper opener (optional), Siemens touchscreen, date printer, sealing jaw, vibration device
- 8-station overview — all stations run simultaneously for maximum throughput
Complete Powder Packaging Line
The SW-L series operates standalone or as part of a turnkey line. ShengWei supplies every component — from screw conveyor to carton packer — and designs custom layouts to fit your factory floor. Send us your floor dimensions and target output for a line proposal.
Premade Bag Packing Machine
Core of the line — 8-station rotary carousel with integrated auger screw filler that loads, opens, fills, seals, and discharges pouches in a continuous cycle.
Auger Feeding Conveyor
Transports powder from floor-level storage up to the machine hopper. Enclosed stainless steel tube prevents moisture ingress and dust leakage.
Auger Screw Filler
Servo-controlled screw rotates a precise number of turns per fill cycle. Interchangeable screw pitch for different powder densities.
Outfeed Conveyor
Finished pouches discharge onto a belt conveyor for downstream checkweighing, metal detection, and carton packing.
Optional Add-Ons
All options integrate with the SW-L control system and can be managed from the main HMI panel. Available factory-installed or as field retrofits.
Branded Components You Can Verify
Every critical component on the SW-L series is sourced from established industrial brands. Part numbers are listed on the quotation sheet so you can verify pricing and availability independently before you order.
Auger Screw (Interchangeable)
Helical flight screw for volumetric powder dosing. Swappable — coarse pitch for dense powders, fine pitch for light powders.
Hopper with Anti-Bridge Agitator
SUS304 stainless steel hopper with built-in rotating agitator. Prevents powder bridging and ensures consistent flow to the auger screw.
Siemens SMART 700 HMI
7-inch colour touch screen with product recipe storage. English, Spanish, Arabic, Russian available.
Siemens PLC
Siemens programmable logic controller. Coordinates all 8 stations and auger servo in real time with fault diagnostics on HMI.
AirTAC 4V210 Solenoid Valve
Controls bag-opening suction cups and sealing jaw cylinders. High cycle-life for continuous multi-shift operation.
Omron E6B2-CWZ6C Encoder
Incremental rotary encoder for precise carousel indexing. Ensures accurate station-to-station positioning at full production speed.
SMC Guide Cylinder
Anti-rotation guided cylinder for sealing jaw actuation. Ensures consistent jaw alignment and seal quality across every cycle.
Schneider Easy9 Breaker
CE-compliant thermal-magnetic protection for main electrical cabinet. Overcurrent and short-circuit protection across all motor circuits.
Is a Premade Bag Powder Machine Right for You?
Premade bag machines and form-fill-seal machines both automate powder packaging. The right choice depends on your bag format needs, SKU count, and production volume.
Choose Premade Bag (SW-L) When:
- You need stand-up, zipper, or gusset pouches with high-quality pre-printed graphics for retail
- You run multiple SKUs and switch bag formats frequently within a shift
- Your product requires clean dosing with minimal dust — the enclosed auger, with an optional dust collector, keeps the seal area clean
- Your SKU mix and changeover frequency, not a fixed daily bag count, decide the economics — the premade-versus-VFFS crossover is a model output, not a constant
Choose Collar Type VFFS When:
- You only need simple back-seal pillow bags
- You run a single SKU at high volume (sustained volume at which your own TCO model shows VFFS paying back)
- Per-bag material cost is the top priority over shelf appearance
- You are willing to invest in forming tubes for each bag size change
When This Machine Is Not the Right Fit
The SW-L series is built for powder and fine granule products only. For free-flowing dry granules (nuts, seeds, candy, coffee beans), the SW-D series with multi-head combination weigher is the correct choice — a weigher is faster and more accurate for granule products than an auger. For liquids and sauces, use the SW-Y series with pump filling. For mixed products (powder + granule or powder + liquid), contact us for a dual-filling configuration.
Why Choose ShengWei Machine
Factory Direct from Guangdong
Designed and manufactured in our own 11,000 m² factory in Shantou, Guangdong. No trading companies, no middlemen — you work directly with the engineers who build your machine.
Built-to-Order Configuration
Voltage (380V/220V, 50/60 Hz), HMI language (English, Spanish, Arabic, Russian, Portuguese, and more), auger screw pitch, and accessories are all configurable per order. OEM branding available for distributors.
Lifetime Remote Support
Free remote video technical support for the life of the machine — not just the warranty period. Common spare parts typically ship from our factory within 3 working days. On-site installation available on request.
80+ Export Countries
ShengWei machines are exported to 80+ countries, including markets in Europe, Southeast Asia, Africa and the Middle East.
Tested Before Shipment — How We Prove the SW-L200 Series
Two-Day Run Test on Your Powder
Every SW-L200 series machine goes through a structured Factory Acceptance Test before it ships: a test run across two working days, with speed, seal quality, weight accuracy, and rejection rate all logged. For a rotary premade-bag powder machine that means verifying auger dosing accuracy on your actual powder, gripper transfer and bag opening across your bag sizes (SW-L200: 80–200 mm, SW-L250: 110–250 mm, SW-L320: 180–320 mm bag widths), and seal quality with fine dust in mind. Free sample test run on your own product and pouches — we send you the test video, usually within 2 working days of receiving your samples.
Approve Before We Crate
Before crating, our QC team sends you the FAT report, a test video of your machine running, and photos for approval. If your order requires it, we coordinate SGS, Bureau Veritas, or TÜV pre-shipment inspection and provide full access to the machine and test records. See how the 4-person QC team works at our Factory & Quality Center.
Frequently Asked Questions
What is the lead time and payment terms?
Can the voltage and HMI language be customized?
What warranty and after-sales support is included?
How does the auger filler handle different powder densities?
How do you prevent powder dust from contaminating the seal area?
Do you provide installation and operator training?
Can I send a product sample for a packing test?
How do I choose between the SW-L200, SW-L250, and SW-L320?
Is this machine food-safe?
What shipping options are available?
Expert Guides
Seal Strength vs Seal Integrity
Fine powder reaching the seal area is a leading cause of leaking bags — how sealing methods and seal-integrity tests handle it.
Read the Sealing Guide →How to Choose the Right Filling System
Auger filler vs multi-head weigher vs volumetric cup — the accuracy mechanism, give-away cost, and cleaning compared.
Compare Dosing Methods →Premade Bags or Form-Fill-Seal?
Bag quality, changeover, film cost, and total cost of ownership — when a rotary premade-bag machine beats VFFS for powder, and when it doesn't.
Read the Comparison →UK Case Study: SW-L200 Powder Packing in Zipper Pouches
A UK-based company that packs powders needed to fill zipper pouches from about 50 g to 1 kg.
Read the case study →Other Premade Bag Machines
Same rotary platform, different filling systems — choose by product type.
Granule Packing Machine
Multi-head weigher filling for granules: snacks, nuts, seeds. Same rotary platform and premade bag formats.
Liquid Packing Machine
Liquid and paste filling, with the dosing set-up matched to each product. Same rotary platform and premade bag formats.
Collar Type Powder Packing Machine
Form-fill-seal auger powder machine. Higher throughput using roll stock film instead of premade bags.
Ready to Discuss the SW-L Series?
Send us your bag dimensions, powder type, target fill weight, and daily output. We will confirm the right model and auger configuration and return a quotation within one business day.
info@shengweimachine.com · +86 181 2511 2025
Usually replies within one business day · Helps packaging buyers across 80+ countries
