The externally piloted angel-seat valve (type 2000 consists of pneumaticallyoperated pistonactuatorand a 2/2-way valve body . The actuator casing is manufactured of polyamide(PA) or, alternatively, polyphenylene sulfide (PPS) for special applications. The time-proven, self-adjustingpacking gland ensures high seal integrity. The flow optimizing valve body made of gunmetal or stainless steal enables high flow-rates. materials: Body Material: Body Threaded : gunmetal, stainless steel 316/316L/ss316/304 Body w/weld ends: stainless steel 316L Actuator Casing: PA or PPS Seal Material: PTFE, stainless steel Packing Gland (with silicone ): PTFE V-ring with spring conmpensation. Technical parameter : Valve function:Normally close Working pressure:0-16bar medium temperature:-10°C- +200°C Ambient temperature:-10°C- +80°C Applied medium:Ntutral gas ,air