Bag palletizers

Bag palletizers stack sacks of cement, feed, seed, resin, and flour. High-level and robotic models with rated bags per hour, flatteners, grippers, and dust.

Updated October 2, 2026

A bag palletizer stacks filled bags or sacks onto a pallet in a set pattern. Common products are cement, mortar, feed, seed, plastic resin, flour, sugar, and pet food. Bags are harder to stack than boxes. They are soft, they shift, and their shape depends on how they were filled. This page covers conventional and robotic bag palletizers with real models and rated speeds.

Bulk bags (FIBCs, or super sacks) are not covered here.

Every speed on this page is the maker’s rated speed. Real output depends on your bags, pattern, pallet changes, and upstream flow. Makers also use different units. Some rate in bags per minute and some in bags per hour. We keep each maker’s unit.

Types of bag palletizers

Conventional high-level. Bags enter at the top of the machine. A turner sets each bag in place. Rows form into a full layer on a plate. The plate opens, and the layer drops onto the pallet. An elevator lowers the pallet one layer at a time. These are the fastest bag machines. Read more on high-level and low-level machines.

Conventional low-level. The same idea, but bags enter near floor level. These are easier to reach for operators and maintenance.

Robotic. A robot arm picks one bag, or a few, and places them on the pallet. It is slower than a high-level machine but easier to change. It can also serve more than one line. Read more on how robot cells work.

Hybrid. A conventional palletizer combined with a robot. Premier Tech says its APR-1150 “combines” its “conventional palletizing machines and our robotic equipment’s flexibility.” It lists a FANUC robot, an electric pallet elevator, alignment bars, and a compression cycle.

Conventional bag palletizers and rated speeds

The hourly ratings above run from 1,500 to 5,000 bags per hour. The per-minute ratings run up to 40 bags or units per minute. Premier Tech also rates its APH-1200 at “Up to 35 units per minute” and APH-1140 at “Up to 22 units per minute.”

Pallets matter too. Premier Tech lists a dispenser that “can handle pallets of various sizes and quality” on the APR-1150. Give the supplier your pallet size, type, and condition range. See case palletizers for more on pallet quality.

Bag weight limits differ. Haver lists “10 to 100 lb bags” for Arcus. Concetti lists bags “up to 50 kg.” Premier Tech lists units “Up to 60 lb” for the APH-1240 and “Up to 100 lb” for the APH-1200. Check the limit for your heaviest bag.

Robotic bag palletizers and rated speeds

The robot cells above are rated from 12 to 28 bags or picks per minute. FANUC rates its M-410iC/110 palletizing robot at “2,200 standard palletising cycles per hour with a payload of 110 kg.” Makers rate a fixed test motion, not a real pick and place. It is not a bag rate. The robot arm alone is not the whole system. Bag flow, the gripper, and pallet changes all limit the rate.

Robotic or conventional

Pick a high-level machine when one line runs fast with steady bag sizes. Pick a robot when the rate is lower, bag sizes change often, or one cell serves several lines. Concetti says high-level machines suit “high-speeds with stable bags.” It says robot arms handle “bags containing stable, aerated, inconsistent products.” Aerated means the product holds air and may settle or bulge.

BW Flexible Systems takes another approach. Its Symach MACH series slides bags “horizontally into the manipulator over a smooth surface.” BW rates the MACH 2 at “13-15 / Minute” and the MACH 8 at “36 / Minute.” It says its Rotax head reaches “up to 50 bags per minute.”

Bag types

The bag style changes how it stacks. Premier Tech lists pillow bags, gusseted bags, gusseted flat bottom bags, and valve bags for its APH series.

Material matters too. Haver lists “Paper Bags” and “Plastic Bags” for Arcus. Concetti offers “Teflon-finished trapdoors for plastic bags” on its high-level machine. Tell the supplier your exact bag maker and spec.

Bag flatteners and bag turners

Flatteners. A flattener spreads the product evenly inside the bag. A flat, even bag stacks into a square layer. Chantland’s 2400A uses an “Incline Bag Flattener, which flattens, shapes and elevates the bags to the proper height for entry into the palletizer.” Haver lists a bag flattener as a module for Arcus. Premier Tech lists “Preparation systems to level or flatten bags” as an option.

Turners. A turner rotates the bag before it enters the pattern. Haver offers “Clamp, Cross, and Bumper” turning styles. Möllers uses “turning flaps” on the PLS-B. They stop one side of the bag, and the torque turns it 90 degrees. Chantland offers a “180 Degree Inline Bag Turner conveyor” as an option.

Compression. Many machines press each layer flat. Premier Tech lists “Lateral squaring alignment bars and compression cycle to level products and stabilize loads.”

Grippers for bag robots

Bags are soft and sag. So many bag robots support the bag from below.

• Finger or fork grippers slide under the bag. Premier Tech’s APR-1150 uses a “Soft and malleable adjustable finger gripper that prevents bag damage, tears, and dropping issues.”
• Top clamps hold the bag in place during travel. Piab says its bag grippers use “Top mounted bag clamps” and “Independent decking plates” to square the bag. Piab lists “25 and 50kg payloads” for “plastic, woven cloth or paper bags.”
• Toggle clamps lock shut. DESTACO says its bag grippers use a “toggle-lock power clamp” that holds even if air pressure is lost. DESTACO says they can “palletize up to 30 bags per minute when working in concert with robotic automation.”

Adjusting the gripper for a new bag width takes time. Piab says its fixed-width version adjusts in 4 minutes and its adjustable version in 30 seconds. Ask how long your changeover takes.

Dust and washdown

Bag lines are dusty. NIOSH researchers report that dirty bags “become a major dust source for bag stackers and any other individuals handling the bags.” The study covers industrial minerals plants. In one NIOSH field test, a dual-nozzle filler with an improved bag clamp cut the bag stacker’s dust exposure by 90 percent. The stacker was loading bags into an enclosed vehicle.

Dust can also build up on the machine itself. Ask the supplier:

• Which sensors and motors are sealed against dust.
• How the machine rejects broken or leaking bags. Premier Tech offers “Leak, weight, and metal detection systems coupled with a rejection conveyor.”
• Whether the palletizer area is a classified (hazardous) dust location. If so, motors, sensors, and panels must be rated for it. OSHA’s rule for these areas is 29 CFR 1910.307. It points to NFPA 70, the National Electrical Code.

OSHA lists sugar, starch, flour, feed, and plastics among materials that can form combustible dust. NFPA 652 makes the owner responsible to ensure a dust hazard analysis (DHA) is completed where combustible dust is present. Cement and sand dust can carry silica. OSHA’s silica rule, 29 CFR 1910.1053, applies where workers are exposed.

Food, feed, and pet food plants may need to clean the machine with water. Concetti offers “stainless steel parts for contact surfaces” on its high-level machine. Ask for the washdown rating of motors, sensors, and panels in writing.

Cost

None of the bag palletizer makers above publish prices on the pages cited. See the public prices we found. Ask each quote to list the flattener, turner, pallet dispenser, sheet dispenser, and conveyors as separate lines.

Safety

High-level bag palletizers have moving layer plates and elevators. Robot cells have fast arms. Premier Tech lists “safety fences with trapped key interlocking, door safety circuit check, light curtains, and automatic locking pins on the elevator” on its APR-1150. It lists “ANSI B155, 1-2006” and “ANSI/RIA, 15,06” among its safety standards. Today these are ANSI/PMMI B155.1 for conventional machines and ANSI/A3 R15.06-2025 for robot cells. OSHA 29 CFR 1910.212 requires machine guarding. Never bypass guards, interlocks, light curtains, or area scanners. Use lockout/tagout before anyone enters the machine or clears a jam. OSHA’s lockout rule is 29 CFR 1910.147. Lockout must cover air and gravity, not just power. Set the elevator locking pins or blocks before anyone goes under a raised layer or pallet. Set any bag in the gripper down, then bleed the air. Tell affected workers before you lock out and again before restart. See the full lockout and guarding rules.

Next steps: work through the steps to buy a palletizer, choose your stacking patterns, and plan the film wrapper after the palletizer.