La Ricambi Udinese:

Technical blog

Problem solving

We offer a complete range of products and services for filtration, but above all the advice and technical assistance necessary to identify the most advantageous treatments for our customers, because they can improve the performance of the machines and, thanks to the programming of maintenance plans, hoc, help prevent breakdowns and arrests in production. La Ricambi Udinese offers hydraulic advice on filtration and similar, retrofitting sizing on filtration in pre-existing hydraulic systems.

PROBLEM SOLVING: BACKFLOW FILTRATION

The problem

One of the biggest problem in hydraulic transmision, is the oil that feeds the hydraulic motors. In these machines, the flow of hydraulic oil could goes from A to B and vice versa.

The cause

After some working time, the oil becomes so dirty that all components (pump, valves and motor) will clog up. To avoid this problem, a filtration system must be applied, but not a simple line pressure filter, since it’d work with flow from A to B but not from B to A (the filter cartridge will blow-up if flow goes in contrary way).

The solution

To solve the problem that we talked about last time, there are 2 ways:

1) The most economic, is to use a pressure line filter with a back flow valve, in this case the flow is filtered from A to B and can go back from B to A without being filtered

2) more expensive but more realible, is to adopt a Graetz Bridge filter system that permits the flow to be filtered both from A to B than to B from A. Eventually is possible to build it using 4 check valves and a standard pressure line filter.