Safety close-off valve arrangement for pipe conduit systems and installations

A safety arrangement for separating liquids including milk, extraneous water and cleansing medium, for use with a system including a first running container, two supply conduits located upstream of the first running container and supplying the liquid into the latter, a negative pressure device connected with the first running container, an automatic cleansing device operative with the cleansing medium, a pump located downstream of and conveying the liquids from the first running container, and separate receiving means for receiving the respective liquids, the arrangement comprising sensing means operative for sensing characteristics of the different liquids and including two first sensing elements each located in a respective one of the supply conduits upstream of the first running container, and a second sensing element located downstream of the pump and immediately upstream of the receiving means so as to sense the characteristic of the liquids at these substantially spaced locations;

• closing means including two close-off valves each located between a respective one of said first sensing elements and the first running container and connected with the negative pressure device so as to operate by the latter;
• and common electronic control means arranged to electronically connect said sensing means with said closing means so as to actuate the latter in response to sensing of characteristics of the liquids by said sensing means.