... in 1,3,6,8,12 and 21 round models with swing bolt and clamp closures are a proven design, suited for ... chemical and pharmaceutical applications. Inside of shell was mirror polished with no roughness and sanitary dead corner. Gauge ports and drain ... purity and critical applications All housings are standard with 2226 /222style cartridge adaptors with removable tube sheet, givingyou a positive locking tab ...