Process: Max. pressure: 160 bar @ 38°C (with GR18, MT18 or SHV type valves) Max. temperature: 300°C (max. temperature allowed by borosilicate glasses as per the DIN 7081 standard
Steam: Max. pressure: 22 bar (with GR18, MT18 or SHV type valves) Max. temperature: 216°C (saturated steam @ 22 bar)
For saturated steam values > 20 bar, a low-maintenance transparent level gauge with mica shield protection should be used (see graph "glass loss caused by boiler water" for the estimated glass life). Not only does the glass life depend on the temperature, it depends on the pH of the water (the higher the value, the shorter the glass life).