How Do You Choose a Dispensing Peristaltic Pump Supplier? Accuracy, Flow, Control?

You want every vial to get the same amount. So what should you ask a supplier before you buy? A good dispensing peristaltic pump supplier shows you three things. It tells you how accurate each dose is, how much liquid the pump moves, and how you control it. Innofluid's V6 series is a good example. Its flow rate accuracy is < ±0.5%. Its flow goes from 0.0053 to 12,000 mL/min. You can run it with a touch screen, a foot switch or MODBUS.

Innofluid Co., Ltd. has spent 20 years on peristaltic pump research. In that time, one thing became clear. An accuracy claim means little unless the supplier shows real filling data.

In this guide, you will learn about accuracy, flow, controls, dispensing modes and build. It is for people who buy pumps for biopharma, research labs, environmental work and chemical plants.

What Is a Dispensing Peristaltic Pump?

A dispensing peristaltic pump is a pump that moves a set amount of liquid through a soft tube. Rollers press the tube to push liquid. The liquid only touches the tube, so the pump itself stays clean. 

A basic pump just runs at one speed. A dispensing pump gives a set dose, stops, and repeats. People use it to fill vials, bottles and test tubes. How exact it is depends on the motor, the pump head and the tube size.

Spec Sheet Terms Every Buyer Should Know

Dispensing Peristaltic Pump Supplier Checklist

A good dispensing peristaltic pump supplier gives you real numbers, not just sales talk. Ask these questions when you compare prices. The right side of the table shows Innofluid's answers for its V6 series.

What to Ask Before You Request a Quote

How Accurate Should Each Dose Really Be?

You should look for accuracy of < ±0.5% of flow. All three V6 drives list this number. Each one uses a closed-loop stepper motor. You can set speed in steps of 0.01 rpm. You can set volume in steps of 0.01 mL and time in steps of 0.01 s.

This number is important. Innofluid says peristaltic pumps had a dispensing error above ±1% for many years. So if a dispensing peristaltic pump supplier claims ±0.5%, ask to see the test results.

Why Small Volumes Need a Closer Look

Most of the listed fills for the V6-3L small-volume dispensing pump stay within ±0.5%. Very small doses vary a little more. A 0.4 mL fill on 13# tubing stays within ±0.8%. A 2 mL fill with two EasyPump heads stays within ±1%.

So ask for the accuracy at your own dose size. Then weigh a few fills on a lab scale. Check again after new tubing has been used for a while.

Matching Flow Range to Your Fill Volume

Pick the drive that already has test data for your dose size. All three V6 drives run at 0.1 to 600 rpm. The pump head decides how much liquid each one can move.

V6 Drive Comparison at a Glance

V6-3L for Small Doses and Many Tube Sizes

The V6-3L fits 11 tube sizes. You can use one or two EasyPump heads. It can fill from 0.4 mL up to 100 mL. The EasyPump head also has a US patent (US 11,852,136 B2). Innofluid shares this in its company news.

V6-6L as a Mid-Range Peristaltic Filling Pump

The V6-6L uses a DZ25-6L head. It fits 15#, 24#, 35# or 36# tubing. It can fill from 30 mL up to 100 mL within ±0.5%. It fills 24 to 27 pieces each minute. You can find all the details for this V6-6L peristaltic filling pump.

V6-12L as a High Flow Peristaltic Pump

The YZ35-II head is made of cast aluminum alloy. It weighs 2.8 kg. With 26# and 73# tubes, the tubing can take 0.27 MPa of pressure in nonstop use. With 82# tubes, it can take 0.14 MPa.

With one head, it fills 200 mL in 1.5 s. That is 24 pieces a minute. With two heads, the high-flow V6-12L drive fills 500 mL in 2 s. That is 20 pieces a minute.

Which Controls Make Dispensing Easier?

Pick controls that fit the way your team works. A touch screen peristaltic pump is easy to use on a lab bench. For hand filling or a full production line, the pump can also take outside signals.

Touch Screen Peristaltic Pump Interface

The pump has a 4.3" color LCD screen made for industrial use. You can use the touch screen or the keypad buttons. The keypad is built to last 300,000 presses. You can see the status, flow data and settings on one screen.

Using a Peristaltic Pump Foot Switch

You can start, stop or change the pump's direction with a passive switch, like a foot pedal. The pump also takes an active 5V to 24V signal. A foot pedal keeps both your hands free. Just place a vial, press the pedal, and move to the next one. Innofluid sells a matching foot pedal switch accessory.

Links to a PLC or Filling Line

You can control the speed from outside with 0 to 5V, 0 to 10V or 4 to 20mA.

It connects to other machines through RS232 or RS485 with MODBUS RTU.

An open-collector output tells you when the motor is running.

It runs on AC 220V as standard. AC 110V is also available.

How Does an Intelligent Dispensing Peristaltic Pump Save Setup Time?

An intelligent dispensing peristaltic pump saves you setup time. You set the dose, the pause and the number of repeats just once. Then the pump does the rest on its own. The V6 series has four working modes: fixed volume, volume dispensing, speed dispensing, and timing start/stop.

You can set each dose from 0.01 to 9999 mL. You can set the fill time and the pause time from 0.1 to 9999 s each. A cycle can repeat 1 to 9999 times. If you set it to "0", the pump keeps dispensing nonstop.

Calibration Without Stopping the Line

You can adjust the flow while the pump is still running. So there is no need to stop a batch to fix a small error. Each product page has a video that shows how to calibrate. To learn more, read this guide to steady dosing flow rates.

What Build Details Protect Your Product and Pump?

Check three things in how the pump is made. It should stop drips at the nozzle. It should be strongly built. Its tubing should also suit your liquid.

Back Suction for an Anti-Drip Peristaltic Pump

You can set the back suction angle from 0° to 360°. After each dose, the rotor turns back a little. This pulls the liquid back from the nozzle tip. On V6 drives, this is how drips are stopped.

Stainless Steel Peristaltic Pump Build

The pump is made with 304 stainless steel. Its circuit board has three layers of coating. The coating keeps out dust and moisture. It also protects against static and corrosion. The pump works well at 0 to 40°C and below 80% relative humidity.

Tubing Sizes That Match Each Pump Head

Each pump head fits only certain tube sizes. The table above shows which ones. Innofluid offers silicone, PharMed BPT, Tygon, Viton, Versilon and Chem-Durance tubing. First, pick a tube material that suits your liquid. Then compare your choices in the tubing and accessories range.

Common Mistakes When Comparing Pump Suppliers

Many buyers make mistakes because they look at just one number. Check these points before you buy from any dispensing peristaltic pump supplier.

Trusting just one accuracy number: A quote for a peristaltic filling pump may show only one number. Ask how accurate it is at your dose size.

Buying more flow than you need: A high flow peristaltic pump like the V6-12L starts its listed fills at 50 mL. For tiny doses, pick a smaller drive.

Forgetting about drips: Without an anti-drip peristaltic pump setting, drops at the nozzle make each fill less exact.

Not checking how it is built: A stainless steel peristaltic pump with a coated circuit board works well in damp or dusty rooms.

Not checking the controls: For hand filling, make sure the pump takes a peristaltic pump foot switch. For automatic lines, check for 4 to 20mA or MODBUS RTU.

What Stands Behind Innofluid as a Supplier?

Innofluid is a dispensing peristaltic pump supplier. It designs, researches, makes and sells its own pumps. The company is based in the Lingang New Area of Shanghai, China. 26% of its team works in R&D. Each year, it brings out 3 to 5 new product series.

The company has 20 years of R&D experience. It holds 119 patents. It sells to customers in 110 countries. The Innofluid homepage says all its products are CE certified. You can also see its pumps at the Pittcon, Analytica, CPHI and Achema trade shows.

FAQs

What accuracy should a dispensing peristaltic pump supplier publish?

You should look for < ±0.5% flow rate accuracy. All three V6 drives list this number. Very small doses can vary a little more.

A 0.4 mL fill on 13# tubing stays within ±0.8%.

Always ask about accuracy at your own dose size.

Can a peristaltic pump foot switch start each dose?

Yes, a foot pedal can start each dose on a V6 drive. The pump takes a passive pedal signal. It also takes an active 5V to 24V signal.

Your hands stay free to hold vials.

You can buy a matching pedal from Innofluid.

Can a dispensing pump connect to a PLC?

Yes, a V6 pump can connect to a PLC. It can use RS485 with MODBUS RTU. It can also use an analog signal of 0 to 5V, 0 to 10V or 4 to 20mA.

RS232 works too.

An output tells you when the motor is running.

How does an anti-drip peristaltic pump stop drips?

It stops drips by turning the rotor back a little after each dose. On the V6, you can set this back suction angle from 0° to 360°.

This pulls liquid back from the nozzle tip.

Try a few angles with your own liquid.

What material is the V6 pump built from?

The V6 is a stainless steel peristaltic pump. It is made from 304 stainless steel. Its circuit board has three layers of coating to protect it.

It works at 0 to 40°C.

It works when relative humidity is below 80%.

Conclusion

To choose a dispensing peristaltic pump supplier, check three things. Pick a drive that fits your dose size. Check the accuracy at your volume. Then check the controls. Innofluid Co., Ltd. makes these checks easy. 

For its V6 series, it shares fill data for each tube size, < ±0.5% accuracy, and control details. The V6 is an intelligent dispensing peristaltic pump and a touch screen peristaltic pump in one. For the right setup, share your filling requirements with the team.