AGS的简单介绍60 SeriesAGS的详细信息Maximum working pressure: ◎ One-piece body construction ◎ Two-stem design: thread hardened upper stem and smooth surface hardened lower stem ◎ Upper stem thread lubricant isolated from system media ◎ Safety back seating seal in fully open position ◎ Steady and durable fastening of the handle by double lock-pins ◎ Handle of different colors are available for option |