steel astm a grade cf m ■ forged brass ■ nickel aluminum bronze astm b c springs ■ stainlesssteel elastomers ■ nbr wetted parts ■ stainlesssteel & brass (standard) ■ stainlesssteel ■ monel ■ hastalloy c- orifice ■ mm pressure adjustment valve opens when pilot line pressure drop to the setting point...