Pumps for used frying fat

The challenge: the feed pump needs to be able to reliably handle viscous, sticky fat

The special properties of fat from deep-frying place high demands on pump technology. It has a high viscosity, especially at low temperatures. It often contains food residue, carbon particles and other solids, which further impede pumpability. Oxidation can also produce complex, high-molecular compounds that make the fat even more viscous and sticky.

These resinous substances can become deposited on the inner walls of the pumps. This impedes the mobility of mechanical components and reduces the delivery capacity, whilst increasing energy consumption and accelerating wear. Oxidation products can also have a corrosive impact, damaging metallic components. This results in downtime and high repair costs.

Solution: Progressing cavity pump from Lutz-Jesco impresses with performance, reliability and durability

The operator of the digestion tower finally found a suitable pump for the old frying fats at Lutz-Jesco. After a successful pumping test, he decided in favour of the progressive cavity pump B70V50.1. The pump is specially designed to pump viscous media with a viscosity of up to 100.000 mPas. It achieves a flow rate of up to 3.000 litres per hour and a delivery pressure of up to 8 bar. With a nominal dimension of 1200 mm, it is ideally suited for use in deep containers or tanks.

In order to improve the flow behaviour of the old frying fat and simplify pumping, the operator has fitted the extraction containers with a heating sleeve.

The operator of the digestion tower was not only impressed by the performance, but also by the long service life of the progressive cavity pump. The housing and all parts in contact with the medium are made of robust stainless steel. The pump is therefore highly resistant to corrosion and aggressive media.

Another advantage is the modular design, which allows easy access to wear parts. A fast-response service from Lutz-Jesco ensures that spare parts are available within 24 hours, minimising downtimes. For the operator of the digestion tower, the PW B70V-50.1 was therefore the ideal choice for conveying old frying fats into the digestion tower.