Peristaltic Pumps

Tubing choice sets both the flow rate and the chemical and sterility performance, so match the material to your fluid first. Silicone suits many sterile aqueous applications, while more resistant grades handle solvents and longer life. The tube bore and wall thickness then set the flow at a given speed. Ask the seller which tube sizes the head accepts so your validated tubing fits.

Tube life depends on the material, the pump speed and the pressure it works against, since the rollers fatigue the tube over time. Continuous high speed running shortens life, while gentle intermittent use extends it. Plan to replace tubing on a schedule before it fails and leaks. The seller can advise typical tube life on the model and whether spares are readily available.

Variable speed digital pumps dose accurately once calibrated for the specific tube, because flow relates to speed and tube dimensions. Calibrate the delivered volume against a balance and recalibrate when you change tubing. For fed batch and reagent addition this gives repeatable control. Ask the seller whether the listed pump offers the speed resolution and calibration features your dosing needs.

Peristaltic pumps handle moderate back pressure, but high pressure squeezes the tube harder and shortens its life. Note the pressure your line imposes from filters and fittings before selecting a pump. Heavy duty hose pumps tolerate more pressure than light tube heads. Give the seller your line pressure so they can confirm the pump and tube suit the duty.

Financing is offered on qualifying listings, which helps when a multichannel or industrial hose pump carries a higher price. Put the question to the seller when you enquire and they will say if the pump is eligible. Spreading the cost keeps capital available for tubing and installation. The terms depend on the pump and the seller.