PPGF check valve with cone and Hastelloy C spring, double union, with unions nuts and o-rings, without sockets

PPGF check valve with cone and Hastelloy C spring, double union, with unions nuts and o-rings, without socketsPPGF圆锥形阀瓣与Hastelloy C弹簧组合的检查阀，采用双联接结构，配备联接螺母和O型圈，不带有插座。