Valve Bag Filling Machine for Powders & Granules
Pneumatic valve bag filling with automatic weighing and optional bag loading for dry powders and fine granules.
Pneumatic Valve Bag Filling
Valve Bag Filling Machine
The Valve Bag Filling Machine fills valve-type bags using a pneumatic material-transfer system and automatic weighing. Material is delivered through a filling nozzle into the bag, and filling stops at the target weight.
Applications listed for this model include cement, gypsum, dry building mixtures, powdered paints and flour. Material flow, bulk density, particle size and the bag valve must be checked for each application. The listed packing-weight range is 10–60 kg per bag.
An automatic bag loader is optional; confirm bag placement, discharge and any ultrasonic sealing equipment in the quoted configuration. Compare open-mouth bagging machines if your product uses an open-top sack, or request a valve bag filling quotation.
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Machinery photos
Process flow
1. Connection to Hopper
The packing machine is generally positioned beneath the finished product hopper and connected via a soft, flexible link. A pneumatic butterfly valve is installed at the feeding port, automatically opening and closing according to the packaging cycle, ensuring smooth material flow control.
2. Material Transfer into Pressurised Chamber
When preparing to fill a bag, the pneumatic butterfly valve opens to allow material to flow from the hopper into the pressurised chamber of the packing machine. This chamber temporarily stores the product before dosing.
3. Filling the Bag with Compressed Air
At the start of the filling process, the pneumatic valve at the inlet automatically closes. Compressed air is then used to propel the material from the pressurised chamber through the discharge nozzle into the valve bag. This ensures rapid, consistent bag filling—particularly effective for powdery or granular materials.
4. Weighing and Filling Accuracy
The machine follows the gross weight principle, meaning the total weight of the product and the bag is measured in real time during filling. Once the set target weight is reached, the machine automatically stops the flow of product from the nozzle to maintain precise dosing accuracy.
5. Bag Release and Transfer
Once filling is complete, the bag is automatically released from the filling nozzle and pushed away using a bag-pushing device. It typically drops onto a belt conveyor located beneath the filler, which transports the bag to the next stage, such as palletising.
6. Pressure and Flow Adjustment for Versatility
The compressed air pressure supplied to the filling pipe can be independently adjusted to accommodate different product characteristics—including those that are challenging to fill. The dosing valve features a “thin” or fine flow mode, with an adjustable free flow section to allow accurate control of dosing error within a desired range. This flexibility helps maintain filling performance and ensures consistent bag weight—even for materials with varying bulk densities.
Note:
For products with a bulk density of 1000 kg/m³ packed in 50 kg bags, the system achieves a filling capacity of approximately 18 tonnes per hour. Product properties have a significant influence on overall filling efficiency.
Features
Automation Control
The valve bag filling machine features an advanced automation control system, ensuring each bag is packed accurately and efficiently. It can also be fitted with an automatic bag loader for fully automated packaging.
High Packing Speed
Capable of packing 5 to 6 tonnes per hour, this machine is suitable for free-flowing granular or powdered materials such as fertilisers, animal feed, and chemicals.
Adjustable Packing Speed
The packing speed can be easily adjusted to suit production requirements, allowing for greater flexibility across different applications.
Intelligent Sensors
Equipped with smart sensors, the machine monitors bag position, weight, and sealing status in real time. Any detected anomaly triggers an automatic shutdown, ensuring product safety and consistent quality.
Durable Construction
Key components are made from wear- and corrosion-resistant materials, providing reliable, long-term operation under demanding industrial conditions.
Stable and Reliable
The machine runs smoothly with excellent stability, minimizing errors such as inaccurate weighing or spillage and ensuring consistent, high-quality packaging results.
Specifications
| Valve Bag Filling Machine Specifications | |
|---|---|
| Model Number | WZ - FK50 |
| Packing Weight | 10–60kg per bag |
| Filling Accuracy | ≤±0.6% |
| Packing Speed | 200–280 pcs/hour (25kg cement) or 5–6 tons/hour |
| Max. Material Size | ≤5mm |
| Feed Port Diameter | φ300mm |
| Nozzle Diameter | Standard φ63mm (can be made upon request) |
| Bag Opening Size | ≥φ70mm (standard) |
| Air Supply Pressure | ≥0.5–0.6MPa |
| Compressed Air Requirement | ≤0.8m³/h |
| Frequency Converter | SIEMENS |
| Auxiliary Device | Automatic pushing platform |
| Optional Features | Ultrasonic sealing |
First ever packaging machine questionnaire
Which machine do you need?
Take our quick questionnaire to discover which bagging machine fits your needs. For an exact match and pricing, a detailed quote will be required.
Why Choose Us
FAQ
Which materials and bags suit this valve bag filler?
The listed applications include cement, gypsum, dry building mixtures, powdered paints and flour. This model fills through the valve opening rather than an open bag top. Confirm product flow, bulk density, moisture, particle size, valve construction and bag dimensions before selecting the feeder and nozzle. Compare open-mouth bagging if you use open-top sacks.
Is bag placement automatic on the valve bag filling machine?
An automatic bag loader is an optional feature. Automatic weighing and filling do not by themselves mean that empty bags are loaded automatically. Your quotation should specify bag placement, filled-bag release, conveying and any valve-sealing equipment so the required level of operator involvement is clear.
What affects valve bag filling output and accuracy?
Output depends on the material bulk density and flow behaviour, target bag weight, bag valve, air settings and handling time. Filling accuracy also depends on material behaviour and weighing settings. Compare quotations using the same product, bag and operating conditions, and agree the required output and weight-tolerance test rather than relying on an isolated tonnes-per-hour figure.
What information is needed for a valve bag filling quotation?
Send the product name, bulk density, maximum particle size, moisture, target bag weight and required bags per hour. Include bag dimensions, valve opening details, hopper arrangement, dust-extraction needs and whether you want automatic bag loading or ultrasonic sealing. Our fluent English support helps clarify these requirements and the proposed quotation. Request a valve bag filling quotation.
Can valve bag filling be connected to palletising and wrapping?
The filled-bag discharge can be assessed with the conveyor, palletising and pallet-wrapping arrangement needed for your line. Confirm bag orientation, discharge height and the capacity of downstream equipment. Explore automatic palletisers and specify the full line when requesting your quotation.
What is your production and delivery time?
The typical production cycle for our equipment is approximately 10-30 working days, depending on the machinery. Once production is completed, you can either visit our factory for an inspection or request photos and videos of the finished products.
We offer various transportation options, including rail, sea, and combined (sea and rail) transport. Delivery times vary by region:
* Southeast Asia: 7-15 days
* Central Asia: 20-30 days
* Middle East: 20-40 days
* Africa & Americas: 30-50 days
* Russia & Europe: 25-40 days
We also provide detailed photos and videos of the loading process, along with complete information regarding equipment declaration and customs clearance.
We offer various transportation options, including rail, sea, and combined (sea and rail) transport. Delivery times vary by region:
* Southeast Asia: 7-15 days
* Central Asia: 20-30 days
* Middle East: 20-40 days
* Africa & Americas: 30-50 days
* Russia & Europe: 25-40 days
We also provide detailed photos and videos of the loading process, along with complete information regarding equipment declaration and customs clearance.
What is the warranty for the machine?
The warranty period of our equipment is 12 months, usually it takes about 30 days (1 month) from China to the customer's place, and the installation and commissioning time also takes about 30 days (1 month), so the warranty period is extended to 18 months from the date delivery (excluding wearing parts). We will provide customers with the necessary wear parts upon delivery of the goods. If there are any quality problems during the warranty period, we will fix the problem as soon as possible. If the parts need to be replaced, we will deliver them to the customer by air, and we will take care of all costs.
Can engineers be sent to the site for installation and equipment debugging?
Depending on the machinery, we will send an engineer to your facility to assist with machine installation and provide training for your staff on its operation. We will also provide installation instructions for the production line, layout drawings, assembly drawings, etc. If the customer has his own engineer, he can install the equipment according to the installation drawings, and we can also guide the installation. The customer is responsible for covering round-trip airfare, accommodation, and a fee of USD 150 per day per person. The duration of the visit will depend on the machines ordered, typically ranging from 7 to 30 days.
What certificates do you have?
We hold ISO 9001 certifications for environmental protection and quality management systems. Additional certifications, such as SGS and EAC, can be provided based on the requirements of the customer's country.
What are your payment terms?
Payment ≦ 5000 USD, 100% in advance. Payment ≥ 5000 USD, 30% T/T in advance, balance before shipment.
Can you produce customized equipment based on our requirements?
Yes, we can manufacture customised equipment tailored to your specific needs. Since end users best understand the challenges they face during operation, we welcome customer feedback and continuously improve our machines based on those insights.