PTFE Lined sight glasses are vital components for monitoring industrial processes, offering operators a clear and safe way to observe the flow and condition of Corosive fluids in real-time. Built with a toughened borosilicate glass window, these devices are encased in frames lined with corrosion-resistant Teflon such as PTFE, PFA, FEP, or PVDF. Designed to meet DIN 7080 standards, ide... https://www.freture.com/ptfe-pfa-fep-lined-valves-manufacturers/sight-glass-valves/