Gusset Bag Packing Machines

Yes — the SW-D320 (320 mm bag width) configured with reinforced gripper arms handles gusset bags up to 10 kg fill weight. Pet-food brands typically use this configuration for 5 / 7.5 / 10 kg retail SKUs. We recommend 14-head combination weigher for fastest fill cycle on heavy bags. Inform our engineers of your maximum bag weight at quote stage so we spec the right gripper and conveyor weight rating — tour our Guangdong factory to see heavy-bag lines in production.

Yes. Degassing valves are pre-applied to the bag by your bag converter (not by the filling machine) before bags are loaded into the machine magazine. The SW-D series rotary fillers accept any premade gusset bag with or without valve — no machine modification needed. Specify "valve-ready bag" with your converter and ship samples to us for sealing test before commitment.

Both are premade flexible bags filled on the same SW-D / SW-L / SW-Y machine family, but the cross-section differs. Stand-up pouch has a D-shaped base from a folded bottom gusset that opens when filled — ideal for 30 g to 2 kg retail. Side-gusset bag has a rectangular cross-section from folded side panels — ideal for 250 g to 10 kg heavy or large-volume product. Side-gusset gives a flat printable face like a rigid box, while stand-up gives a curved face. See our stand-up pouch page for the alternative format.

Yes — resealable zippers are common on dry pet food, premium grain, and specialty coffee gusset bags. The zipper is added to the bag by your bag converter; the SW-D / SW-L machines include a zipper-opening station as a standard module that detects, opens, fills below, and reseals the top. See our zipper pouch packing machine page for the zipper module configuration details.

PET/AL/PE foil laminate is standard for whole-bean coffee gusset bags (high oxygen barrier needed for fresh-roasted beans). Kraft / PE laminate handles pet food, charcoal, rice, grain (kraft signals natural / organic positioning). Multi-layer PE for heavy-duty industrial gusset bags (fertilizer, garden products). Recyclable mono-PE is increasingly used for sustainable retail SKUs — ship sample bags to our contact for a sealing test before order.

Side-gusset bags typically cost 10–20% more per unit than equivalent stand-up pouches at the same fill weight, because gusset bags use more film (the gusset folds add material) and require more complex bag-converter operations. The cost premium is justified for heavy-fill SKUs where stand-up pouch would deform under weight, or premium-positioning SKUs where the rectangular shelf face commands a higher retail price.

Standard lead time 25–35 working days from deposit confirmation to FOB Shantou for any of the 3 SW-D / SW-L / SW-Y machines — the same window ShengWei has held since 2003. Payment: 30% deposit, 70% before shipment by T/T. Heavy-bag configurations (gripper reinforcement, conveyor weight rating) may add 5–10 days. Sea freight transit: SE Asia 7–14 days, Middle East 18–25 days, Europe 30–40 days.

Yes. Ship 5–10 kg of your product (whole-bean coffee, kibble, charcoal, rice, etc.) plus 50 sample gusset bags to our Shantou factory. ShengWei runs a packing test on the actual SW-D / SW-L / SW-Y machine matching your spec, records video of the fill cycle, and shares results with recommended speed and accuracy settings. Reach our sales team via the contact page for the shipping address.