The support grid is made of several Johnson screen sieve plates. Specification and size is customized. Material: 304, 321, 316 L, 904 L, duplex steel 2205, duplex steel 2207, Monel, Ti.etc.
Due to the good mechanical strength, it effectively prevents its own damage and tear in contact with the filler (quartz sand or porcelain ball, etc.) and catalyst ensuring the safe and smooth operation of the reactor in a long period. Therefore, it has gradually replaced the traditional stainless steel woven mesh and perforated plate tray, and has been widely used in petrochemical field.