4-Head Linear Weigher (6.0L) — The 60bpm Pneumatic Speed King for 1–4kg Heavy Bags

A 40bpm scale tops out the instant your bag hits 2kg, and a multihead that holds 60bpm costs twice as much while still demanding the same air line. This pneumatic, 6L, 200–4000g unit holds 60bpm on the 4kg bag, draws just 0.6kW, and asks your plant for shop air instead of a grid upgrade.

Industry Pain Points

The Four Walls That Cap a Heavy-Bag Line at 60 bpm

If you pack 1–4kg bags of rice, grain, feed, milk powder or sugar at a target of 60 bags a minute, your line does not fail on the bagger — it fails on the weigher's ability to keep up. These are the four walls your production planner hits every shift:

1. ⏱ The Speed-Ceiling Lie — The brochure says 40 bpm, but that figure was measured on a 200g sachet. The moment you load a 2kg rice bag the head cannot fill inside the cycle window and the line quietly drops to 25. This is exactly the doubt behind how fast can a 4 head linear weigher run on heavy bags — and the answer on a mechanical-feed unit is “not as fast as the label.”

2. The 60bpm Starvation — Even a big hopper cannot save you if the feed is mechanical: at a 60bpm cadence a 4kg dose has to land in under a second, and a motor-driven tray simply cannot shovel product that fast, so the head sits empty waiting on feed and the cycle stalls.

3. ⚖️ The X(1) Trust Gap — Your QC lead sees X(1) on the spec and freezes, afraid a 4kg retail or export bag will fail label tolerance — so the purchase stalls in committee while a competitor's over-specified (and over-priced) X(0.5) machine looks “safer.” The real question — is X(1) accuracy enough for 2kg to 4kg bags — never gets an honest answer, so the deal dies on a misunderstanding.

4. The Power & Grid Surprise — A 60bpm heavy-bag line feels like a 2–3kW load, so the plant budgets a panel upgrade — and the export customer discovers the destination socket cannot take it. A hidden CAPEX line nobody modelled, paid for in delays.

A fifth, quieter wall: a weigher that needs a fabricated floor frame in a plant that has ceiling height but no spare square metres — and a feed mechanism that jams the moment the product is a coarse pellet instead of a fine grain.

The Solution

60 bpm on the 4kg Bag. 0.6kW at the Socket. Shop Air Instead of a Grid Upgrade. The Walls, Taken Down One by One.

The 4-Head Linear Weigher (6.0L) is engineered around a single, counter-intuitive truth about heavy-bag throughput: at 60bpm the bottleneck is not the weighing — it is the feeding, and the cost driver is not the speed — it is the power. So every choice on this model attacks the four walls above with a mechanism, not a marketing line:

• Pneumatic feed → the 60bpm wall comes down: the product is driven into each 6L head by compressed-air actuation (the blue lines and orange cylinders you see inside the guard), not by a slow mechanical tray — so a 4kg dose lands inside the sub-second window a 60bpm cadence allows. This is the pneumatic feed linear weigher answer to the starvation wall, and it is why the speed on the label is the speed on your bag.

• 6L head → the head never waits: a 6L weighing hopper per head stores enough product that, even at 60bpm on a 4kg dose, the head is topped by the surge between discharges instead of starved mid-cycle — the 6L hopper linear weigher sized to the cadence, not to the demo.

• X(1) → the trust gap, closed with honesty: X(1) is not a downgrade — it is the OIML automatic-weigher grade that 2–4kg bulk-retail and agri bags are actually labelled to, paired with 0.1g resolution for tight repeatability. The X(0.5) grade your QC lead is afraid to skip is the grade a 5g sachet needs, not a 4kg bag.

• 0.6kW → the grid surprise, erased: because the muscle of feeding is borrowed from your shop air, the electrical draw is only control plus drive — 0.6kW, lower than smaller motor-driven units. The same unit plugs into a 230V or 120V export grid on an ordinary circuit, with no panel upgrade in the budget.

The result is a heavy-bag line whose OEE climbs for two unglamorous reasons: it holds 60bpm where a mechanical unit throttles, and it draws less power than the machine it replaces. And because the body is suspended / table-mount with a large conical discharge funnel that gravity-feeds the bagger, it occupies air rather than floor — so the only thing it asks of a cramped plant is ceiling height. Whether you are scoping it as an industrial linear weighing machine for a new 60bpm line or as a 4 head weigher machine dropped into an existing heavy-bag line, this is the module that removes the walls nobody put on the Gantt chart.

Core Advantages

Application Scenarios

Small granular and powder products across the heavy range — sugar, rice, chicken essence, seeds, salt, milk powder, coffee, seasoning — dosed into 1–4kg bulk-retail, food-service and agri bags at a 60bpm cadence. This is heavy bag weighing machine throughput on grains, pellets and powders alike, on a 4 head linear weigher price for 60bpm line that a multihead cannot match per watt.

Scenario 1 — 2–4kg Rice, Grain & Seed Bulk-Retail Bags
Free-flowing rice, whole grain and seed into 2–4kg bulk-retail and food-service bags is pure volume economics at 60bpm, and the enemy is the speed-ceiling lie. As a 200-4000g linear scale, the pneumatic feed lands a 4kg grain dose inside the cycle window while the 6L surge-backed head keeps the line fed — so the 60bpm you modelled is the 60bpm you ship, bag after bag, without the throttle a mechanical-feed unit imposes the moment the dose passes 2kg.

Scenario 2 — Animal Feed Pellet & Pet Food 2–4kg Bags
Coarse animal-feed pellets and dense pet-food kibble are exactly the irregular, abrasive product that jams a small mechanical tray and stalls a 60bpm cadence. Here the unit earns its keep as an animal feed bagging scale and a pet food large bag weigher: the pneumatic actuation shoves the pellets through without the bridging a tray would cause, the 6L head swallows the surge without crushing the pellet, and the suspended cone gravity-feeds the bagger — so a 2–4kg feed or kibble bag runs at full cadence instead of faulting on every coarse load.

Scenario 3 — Milk Powder, Sugar & Seasoning in 1–2kg Heavy Pouches
Milk powder, sugar and seasoning in 1–2kg heavy pouches combine a powder's cohesion with a heavy pouch's dose — a load that chokes a micro-dose head and over-runs a slow big-bag unit. As a powder weigher for milk powder and seasoning, the 6L heads and pneumatic feed clear the cohesive powder at 60bpm while the X(1) grade with 0.1g resolution keeps every heavy pouch inside its bulk-retail tolerance — one 4 head weigher machine covering the powder SKUs a small sachet-only scale could never reach.

Technical Specifications

Grouped the way a 60bpm heavy-bag buyer actually evaluates: throughput and dosing first (because the speed, the head and the range are the product), then the accuracy-and-control line that decides whether QC signs off, then the power-envelope-mount block that decides your socket, your freight and your air line. Power, weights and the pneumatic air note are stated honestly — 0.6kW, 230/280kg, and a shop-air requirement — not borrowed from a motor-driven model.

Throughput & Dosing

Accuracy & Control

Power, Envelope & Mount

In plain terms, this is the high speed linear weigher and large capacity linear weigher a 60bpm heavy-bag line defaults to when the bag is 1–4kg, the socket is ordinary, and the stops are costing a pallet a shift.

Quality & After-Sales (Trust)

Documented, Not Promised — Honest on Tolerance, Honest on Power, Honest on Air.

• Certified — CE & ISO. Built and tested to CE and ISO standards with the documentation that clears EU, North American and GCC customs on the first pass — the paperwork a serious linear weigher manufacturer for heavy bags ships as standard.

• Honest on tolerance — we tell you the grade your bag needs. We will confirm that X(1) is the correct OIML class for your 2–4kg bulk-retail or agri bag — and tell you plainly when your line genuinely needs X(0.5) (sub-200g) or a multihead (ultra-high-speed fine granule) instead. That candour is why QC leads and CFOs both trust the quote.

• Honest on power & air — no surprise CAPEX. We publish the 0.6kW draw and the shop-air requirement up front, so your electrical and pneumatic trades scope the install correctly the first time — no panel upgrade and no missing air drop discovered on commissioning day.

• Hygienic & rugged — food-grade contact, line-grade body. Product-contact surfaces in SUS304 / 316 stainless with clean, weld-free corners; the pneumatic cylinders and air fittings are industrial-rated for the daily vibration of a grain, feed or powder line at 60bpm.

• Guaranteed — 1-year warranty, 48-hour spares. A documented wear-parts schedule — including pneumatic seals and valves — ships with every unit, and stocked spares dispatch within 48 hours, because on a 60bpm line a worn seal cannot become a week of silence.

• Supported — mounted to your filler, your socket and your air main. We confirm your mount (suspended or table), return a discharge-cone height drawing matched to your bagger, and pre-tune feed parameters on video for your product and your air pressure — so the linear weighing scale arrives configured for your bag, your grid and your compressor, not a bare-unit list figure.

FAQ

Q1 — Will 60bpm really hold on a 4kg bag, and what does the pneumatic feed actually change?
Yes — and the pneumatic feed is the entire reason. On a mechanical-feed unit the 60bpm figure collapses on heavy bags because a motor-driven tray cannot shovel a 4kg dose into the head inside the sub-second cycle window, so the head starves and the line throttles; that is the real answer to how fast can a 4 head linear weigher run on heavy bags on the old architecture. Here, compressed-air actuation drives the dose in fast enough that the 6L head is filled within the window, and the surge-backed hopper tops it between discharges, so 60bpm holds at 4kg instead of dropping to 25. The honest caveat is that your achievable rate is the lower of the weigher's 60bpm and your bagger's rated cycle, and pneumatic performance tracks your plant's air pressure — so send us your target bag weight, your bagger speed and your available air pressure and we will model the trio before you commit.

Q2 — Is X(1) genuinely accurate enough for my 2–4kg retail and export bags, or should I pay for X(0.5)?
For the bag class this machine targets, X(1) is not a compromise — it is the correct grade. X(1) and X(0.5) are OIML automatic-weigher accuracy classes, and X(1) is the class that 2–4kg bulk-retail and agri bags are labelled to under trade rules, while the 0.1g resolution keeps every bag consistent bag-to-bag. The X(0.5) class your QC lead is tempted to insist on is the class a sub-200g sachet needs — which is precisely the range this 200g-floor unit does not serve, by design. So is X(1) accuracy enough for 2kg to 4kg bags? For bulk-retail, food-service and agri heavy bags, yes, with 0.1g repeatability behind it; if your portfolio also includes micro-dose sachets below 200g, that is a separate machine (a micro-dose linear or a multihead), not a reason to over-spec this one. We will confirm the grade against your actual label tolerance in the quote, so QC signs off on data rather than assumption.

Q3 — What do the 0.6kW draw and the pneumatic feed mean for my plant's power, my air line and my export destination — and what is the lead time?
Three practical points. First, the 0.6kW draw means a 60bpm heavy-bag line runs on an ordinary 230V or 120V export circuit — the AC220V / 110V ±10%, 50/60 Hz supply covers essentially every export grid on one SKU — so there is no panel upgrade in your CAPEX, which is the hidden cost a motor-driven 60bpm unit would force on you. Second, because the feeding muscle comes from compressed air, you must provide a clean, dry shop-air drop at standard plant pressure at the install point; we publish the requirement up front and confirm the exact figure on the final datasheet, so your pneumatic trade scopes it on day one instead of discovering a missing air line on commissioning day. Third, the suspended body with its discharge cone hangs over the bagger and gravity-feeds it, so it asks for ceiling height rather than square metres — useful in a tight plant. Standard configurations ship on a published lead time; a customised mount height, hopper finish, HMI language or air-fitting standard adds a short, quoted extension — and the quote you receive, including the air and power spec and the lead time, reflects exactly that configuration, not a bare-unit list figure. If you are deciding where to buy a pneumatic 4 head weigher factory direct, that direct quote — with the air, power and lead-time lines written in — is what you are asking for.

Send Us Your Target bpm, Your Heaviest Bag and Your Plant's Air & Power. We'll Return the 60bpm-Per-Watt Answer in 24 Hours.

A 60bpm heavy-bag line does not need a more precise machine or a bigger motor — it needs a feed mechanism fast enough to keep up, a hopper sized to the cadence, an accuracy grade matched to the bag class, and a power draw that fits the socket you already have. So skip the generic list price. Send us four things and we will do the engineering.

[Get a Free 60bpm Heavy-Bag Throughput Model]
[Request the Pneumatic Air & 0.6kW Power Spec Sheet + Mount Drawing]
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No obligation. No over-specified upsell. Just a pneumatic, 6L, 200–4000g four-head solution sized to your target cadence, your heaviest bag, your compressor and your socket — and the lead time to match.

Disclaimer: Machine renderings, engineering dimension drawings and all technical parameters displayed on this page are for reference purposes only. Please consult our professional sales engineer to confirm customized specifications matching your granule block size, multi-spec mixed giant sack packing layout and hourly ton-level super-batch throughput demands.