The reference airtight filling technology for cement, lime, plaster and all fine powders: two-speed centrifugal impeller, integrated fluidisation, zero clogging.
The valve bag has one decisive advantage: it closes by itself. No sewing, no heat sealing, no operator station downstream. But it imposes a technical constraint — product must be forced through an opening a few centimetres wide, against the air already inside the bag.
The KSMV / KSMSV125 packer answers this with a 7.5 kW centrifugal impeller running at 1,500 rpm. The impeller accelerates the product and projects it through the valve at high speed while excess air escapes through the porous bag wall. The result is a dense, well-filled bag with no air pockets, at an output of 6 tonnes per hour.
As on all our machines, filling runs in two stages: full speed up to the approach set point, then automatic slowdown for finishing to ±100 g. Weight is measured by an HBM RSCM 100 kg load cell connected to an HBM WE 2107 indicator.
A fine powder left standing in a hopper compacts and forms a bridge. Production stops, an operator hammers the hopper wall, and the cycle repeats a few minutes later.
The KSMV includes a fluidisation system across 3 to 4 positions in the hopper base: low-pressure air is injected through porous membranes, keeping the product in a near-liquid state. Powder then flows steadily to the impeller whatever its fineness. On cement and hydrated lime, this is the difference between a machine that runs eight hours straight and a machine that has to be unblocked every hour.
The valve bag makes sense when the product is a fine powder and you want to remove the sewing station: cement, lime, plaster, dry mortars, carbonates. The bag seals under internal pressure, so the line is shorter and needs fewer people.
The open-mouth bag remains preferable for granular products, food products in kraft paper bags, and whenever the end user wants to empty the bag completely and easily. In that case look at the KSM-VB25 screw bagging machine or the KSM-GN50 mobile bagging station.
We build both technologies, and we will tell you honestly which suits your product — including whether a trial on a sample in our workshop is needed first.
Twin-spout version to double output; AISI 304 stainless for food duty; integrated dust collection with filter bags; downstream checkweigher with automatic rejection of out-of-tolerance bags; inkjet batch coding; cloud supervision for remote production monitoring.
KSMSV125 model in standard single-spout configuration.
Sectors where valve bags are the standard.
Cement, tile adhesive, dry mortars, façade renders and screeds.
Quicklime, hydrated lime, building plaster and casting plaster.
Calcium carbonate, talc, kaolin, bentonite and mineral fillers.
Fillers, fine sands and powders from mineral grinding.
Superphosphates, sulphates and pulverulent fertilisers.
Refractory castables, aluminous cements and high-temperature powders.
The impeller projects product by centrifugal force into a closed valve bag: it is faster on fine powders and removes the sewing station. The screw mechanically pushes product into an open bag: it is more accurate on small doses and more versatile. The choice depends on your product and on the bag type your customers require.
Not if the bag is correctly specified. The internal valve closes under product pressure. We verify compatibility between the filling spout and the valve format of your bags — this is the number one cause of leaks on poorly specified installations.
Yes, for fluidisation and the spout inflator. A 7 to 10 bar compressor with dryer is recommended. We state the required air flow in the technical offer and can supply the compressor if needed.
Yes. Changing the target weight takes seconds on the indicator. Changing valve format may require a spout change, which takes about ten minutes.
Allow 10 to 12 weeks for manufacturing, plus 3 to 5 days for on-site installation, commissioning and operator training.
Send us your product, throughput and bag format: we reply within 48 h with a technical proposal and a price.
Open-mouth bagging of powders from 5 to 25 kg, ±100 g accuracy.
Complete line: screening, weighing and 25 kg bagging at 500 bags/h, AISI 304, Siemens PLC.
Stainless vibrating screens, belt conveyors, screw conveyors and magnetic grids.