API 603 Stainless Steel Corrosion-Resistant Gate Valves with API Monogram Special Features: Integral body seat. In-situ hardfacing provided for Trim 12 and 16 valves Flex Wedge - Compensates for seat distortion and eliminates disc-jamming Single-piece forged stem with T-head for superior strength Body-bonnet Joint - Class 150 Globe Valves offered with square-shaped body-bonnet joints in size 2â?? and with oval-shaped joints in 3â?? size. Valves in all other sizes and pressure classes offered with circular body-bonnet joints. Complies to API 624 and ISO 15848 fugitive emission requirements