A piston pump arrangement for hygienic processing applications

Abstract

A membrane comprises a main body having a first side and a second side. The main body is made of an elastic material in order to forward a pressure e.g. formed by a piston. On the second side it is provided a coating made of plastic material such that the main body is not affected by cleaning agents, abrasive products or the like coming in contact with the second surface.

1 . A membrane comprising
 a main body having a first side and a second side,   wherein said main body is made of an elastic material, and   a coating provided on said second side of said main body,   wherein said coating is made of plastic material.   
     
     
         2 . The membrane according to  claim 1 , wherein said elastic material is rubber. 
     
     
         3 . The membrane according to  claim 2 , wherein said rubber is ethylenepropylenedienemonomer (EPDM). 
     
     
         4 . The membrane according to  claim 1 , wherein said plastic material is polytetrafluoroethylene (PTFE). 
     
     
         5 . A membrane arrangement comprising
 a first membrane,   a second membrane,   wherein said first membrane and/or said second membrane is a membrane according to  claim 1 .   
     
     
         6 . The membrane arrangement according to  claim 5 , further comprising a marker liquid placed between said first membrane and said second membrane. 
     
     
         7 . The membrane arrangement according to  claim 6 , wherein said marker liquid is salt water. 
     
     
         8 . The membrane module according to  claim 6 , further comprising a membrane ring connecting said first membrane and said second membrane to each other such that a membrane interior space is formed, wherein said membrane interior space is configured to hold said marker liquid. 
     
     
         9 . The membrane arrangement according to  claim 8 , further comprising a sampling opening in said membrane ring. 
     
     
         10 . The membrane arrangement according to  claim 6 , further comprising a sensor configured to register at least one property of said marker liquid. 
     
     
         11 . The membrane arrangement according to  claim 10 , wherein said sensor is configured to register conductivity. 
     
     
         12 . The membrane arrangement according to  claim 10 , wherein said sensor is placed in said membrane interior space. 
     
     
         13 . A piston pump arrangement comprising at least one membrane according to  claim 1 . 
     
     
         14 . A piston pump arrangement comprising a membrane arrangement according to  claim 5 . 
     
     
         15 . A homogenizer comprising a piston pump arrangement according to  claim 13 . 
     
     
         16 . A processing system comprising a piston pump arrangement according to  claim 13 .