Repair of a Peristaltic Pump

Peristaltic pumps are positive displacement pumps whose main component is a flexible hose or tube made from materials such as Santoprene, Neoprene, Tygon, and others.

This hose combines elasticity, durability, and chemical resistance to a wide range of chemicals, including crop protection products, acids, sodium hydroxide, alcohols, mash, fruit juice, oils, and more.

This component experiences the greatest wear in a peristaltic pump because it is constantly in contact not only with the pumped medium but also with the rollers that continuously compress it, causing gradual wear.

Shown below is a peristaltic dosing pump designed for supplying insecticide for the treatment of wheat grain.

The customer contacted our company for maintenance service involving the replacement of the peristaltic pump hose. The leak was detected in time, allowing the repair to be limited to hose replacement only, without the need to replace the rotor rollers.

New hose

When replacing the hose, the following simple rules should be observed:

• secure the hose in the special groove in the pump housing on the suction side (as shown in this example);

• secure the hose on both sides if required by the pump design and hose length (as shown in the photo below);

• before installation, lubricate the hose and rollers with petroleum jelly lubricant to reduce friction;
• fasten the plastic pump cover with screws to secure the hose in place.