The universal models are equipped with special sockets that offer the option of connecting either a threaded pipe or calibrated soft steel or copper pipe, the latter two by means of a compression union.
The upper part of the thermostatic valve can be changed under pressure by means of the Herz changing tool.
An O-Ring is used as a spindle seal. It is located in a brass chamber, which can be changing during operation. The O-Ring keeps maintenance requirements to a minimum and allows for smooth valve operation over a long period of time.
Operating Data Compression Union
Maximum operating pressure 120 °C
Maximum operating temperature 10 bar
Heating water purity according to Austrian standard ÖNORM H 5195 and/or VDI-guideline 2035. When using HERZ compression unions for copper and steel pipes, observe the permissible temperatures and pressures as specified in EN 1254-2:1998 Table 5. A maximum operating temperature of 80 °C and maximum operating pressure of 4 bar applies for plastic pipe connections, if permitted by the pipe manufacturer.