The document is applicable to circular glass-to-metal fused sight with the sight glass fused into a steel ring which can be subjected to liquid or gas pressure on one side within a temperature range of -10 ?up to 300 ?in flanged holders in accordance with DIN 28120 or in straight pattern valves with circular sight glasses in accordance with DIN 3237-1.
DIN 7079-1:1999 history
2015DIN 7079-1:2015-10 Pressure resistant circular glass-to-metal fused sight glasses - Part 1: For holders with recess
2015DIN 7079-1:2015 Pressure resistant circular glass-to-metal fused sight glasses - Part 1: For holders with recess
1999DIN 7079-1:1999 Pressure resistant circular glass-to-metal fused sight glasses - Part 1: For holders with recess