A timed gravity filler is a liquid filling machine that lets product flow from a fill tank into containers, and what sets it apart is timing: each nozzle’s valve stays open for a precisely controlled time. With steady pressure and flow, the same fill time delivers the same volume every cycle, which cuts the waste caused by uneven fills.
Below, we explain how our machines keep pressure, flow, and time consistent, and which build options fit your production line.
Understanding What a Timed Gravity Filler is and How it Works
The operating principle is straightforward: consistent pressure, flow, and time produce a consistent volume every fill cycle. Our design is built to hold all three steady.
The Three Variables Behind Consistent Fill Volumes
On a gravity filler, each variable maps to a specific part of the machine:
- Pressure: the head pressure in the fill tank
- Flow: how product moves from the tank to each nozzle
- Time: how long each nozzle’s valve stays open
How We Control Head Pressure and Line Loss
We control the supply into the fill tank, which keeps head pressure steady from cycle to cycle. We also design for uniform hose lengths, so line loss stays consistent across every nozzle.
Key Takeaway: Steady head pressure and uniform hose lengths give every fill head the same starting conditions, cycle after cycle.
How Our Valves and Controls Keep Every Cycle Consistent
With pressure and line loss held steady, valve design and precise timing complete the formula.
V-Port Throttling Valves and Full-Port Cutoff Valves
Each nozzle uses two valves with separate jobs:
- A V-port ball valve serves as the throttling valve.
- A full-port, pneumatically actuated, quick-action ball valve serves as the cutoff valve.
PLC Timing to the Hundredth of a Second
A PLC controls how long each individual actuated ball valve stays open, down to the hundredth of a second. This keeps fill time consistent from one cycle to the next.
Pro Tip: When you evaluate any gravity filling system, ask how it controls all three variables. Precise timing produces consistent fills only when head pressure and line loss are also held steady.
Build Options for Your Timed Gravity Filling Machine
We build each machine to our customers’ requirements. These are the main choices you can make.
Fill Heads, Bottle Handling, and Fill Style
- Fill heads: anywhere from 1 to 12
- Bottle handling: manual loading or a conveyorized automatic bottle handling system
- Fill style: top fill or diving bridge
Construction and Mobility
Every machine comes standard with full stainless steel construction and stainless steel leveling feet. C-frame machines can be moved with a pallet jack.
For facilities with space restrictions, we can add casters and conveyor docking stations.
Tool-Free Changeovers and Faster Cleanout
We can build your filler with a unique feature: every wetted part is a change part. This design shortens both changeovers and cleanout.
Every Wetted Part is a Change Part
All parts of the machine that contact your product can be changed with no tools in less than 5 minutes. That greatly reduces cleanout time between product runs.
Eliminating Cross-Contamination Between Products
Because every product-contact part comes off the machine, the chance of cross-contamination between products is reduced to zero. Your next product starts on clean parts every time.
Key Takeaway: Tool-free wetted change parts can be swapped in less than 5 minutes, which shortens cleanouts and eliminates carryover between products.
For expert help choosing the right liquid filler, contact D&R Packaging to talk through your requirements.
Controls and Explosion-Proof Configurations
Our controls layout gives you flexibility in where the electrical enclosure sits.
Standard PLC and Touchscreen Controls
Each machine comes standard with PLC controls and a color touchscreen operator interface. We consolidate the pneumatic solenoid manifold with the electrical controls cabinet, so the controls enclosure can be mounted on the machine or remotely if desired.
Making Timed Gravity Fillers Explosion-Proof
Mounting the enclosure remotely makes the machine explosion-proof with just two additions:
- An explosion-proof conveyor drive
- Intrinsically safe photo eyes
Key Takeaway: The consolidated controls cabinet is what makes explosion-proofing simple. Mount it remotely, add two components, and the machine is ready for hazardous environments.
Let’s Design a Filler Around Your Line
To recap, consistent gravity filling depends on steady pressure, flow, and time. We engineer all three through controlled tank supply, uniform hose lengths, dedicated throttling and cutoff valves, and PLC timing to the hundredth of a second.
Add tool-free wetted change parts, flexible build options, and explosion-proof capability, and you get a machine built for your products. We work with each customer to design the filler to their exact requirements.
Contact D&R Packaging today to request a quote and start planning your timed gravity filler.
