Series RS-OB rectangular ob-round sight glasses are manufactured from ASME Section VIII acceptable metals. The lower flange can be supplied thicker if required to reinforce the vessel opening or curved to match the vessel's geometry. Standard lengths are listed with special sizes quoted upon request. The Series RS-OB is recommended for pressures up to 150 PSIG (14.3 Barg) and temperatures to 500ºF (260 ºC). Higher temperatures and pressures available with special gasket and lens materials. ASME code calculations and any resulting additional material needed to reinforce sight glass opening to meet ASME code is the responsibility of the buyer....
The Series RS sight glass is entirely manufactured from rolled bar stock to withstand the severe service requirements found in process vessels and reactors. These sight glasses can be supplied in carbon steel or Type 304, 304L, 316, and 316L stainless steel with plain or reflex glass.
Standard lengths are listed with special sizes available. These sight glasses are recommended for pressures and temperatures up to 150 PSIG (14.3 Barg) and 500 ºF (260 ºC).