Plymovent SparkShield-500 Spark Arrestor for Ø 500mm Duct - 9760001030 The cyclone spark arrester, SparkShield, is a fire safety product, developed to reduce the risk of fire and to increase the filter’s lifespan. SparkShield prevents sparks, spatters and cigarette butts from entering the ductwork in welding fume extraction systems and reaching the combustible filter cartridge. In addition, SparkShield is also very suitable as pre separator for high-dust applications. The SparkShield comes with a dustbin of 13 and 27 litres. The distance between the spark arrester and dustbin can be enlarged by a duct of Ø 200mm.