PPGF check valve with cone and Hastteloy C spring, sandwich construction, with ANSI* flanges

PPGF check valve with cone and Hastteloy C spring, sandwich construction, with ANSI* flanges锥形阀座与哈斯洛伊C弹簧的PPGF检查阀，采用三明治结构设计，配备ANSI标准法兰。