Our sight glass KTN 711 is made of a 1.4008 (CF8M) stainless steel body and a tempered glass sight glass, threaded connections BSP / NPT . The sight glass has a swirl tab to visualize fluid movement. Our size range is 1/4 “to 4”. The working pressure range is class 800 / PN63. The maximum working temperature is 200ºC at 10kg / cm2 .