The OSP-22133W is a butterfly valve on a mission. It has a bronze body with a BUNA-N boot. Its stem and disc are Monel 400, which means it’s equipped with the best corrosion resistant internals in the business (shoot, even the valve levers are made of stainless steel instead of everybody else’s iron handles). Its wafer body style are made to be sandwiched between ANSI B16.5 flanges and meets API 609.
Fig. 22133 butterfly valves are ABS witness tested at the factory and come with an Equipment Certification Report and stamp on the body of the valve.