Product Application Purpose: Vent Valve Handling Metallurgical Silica Powder Dust from a Dense Phase Pneumatic Transport Vessel Valve Size: 4" (DN 100 mm) Series Number: 486 Housing: Cast Iron Disc: 316 Stainless Steel Disc/Shaft Seat: Black EPDM Limit Switch: Special WestLock Limit Switch, NEMA 4/12, with Special External Pressure Switch Controls: Tork-Mate® Pneumatic Actuator, 890 Series, Spring Return Controls: Automated Seat Inflation, Pilot Operated

    Product Application 21409-1