LIAG^® pigging valves have been designed according to hygienic design guidelines to meet the high demands of process engineering applications. They build upon the same design principle as free flow arc valves. By virtue of this principle no products remain in the valves during operation. The prime use of LIAG® pigging valves is with sterile pigging systems as they can be disassembled easily and quickly even when welded in place, and additionally, offer high CIP capability.