SMP mixproof valves are a simplified alternative to Unique mixproof valves. Designed as a cost-effective solution that stil gives you the advantages of mixproof valves.     SMP valves are available in both on-off and change-over versions. These are double-seat, self-draining units with no seat lift. They provide maximum safety with a minimum of moving parts, and are top-loaded to give easy access for dismantling and service.   Keeps liquids separate by using two seals on the same plug, with a leakage chamber in between. Often used as part of CIP set-ups, with leakage detection for greater safety. In such installations, seat lift is not necessary.   As SMP-BC, but fitted with a PTFE/ rubber diaphragm, designed for use under aseptic conditions, and sterilization involving high temperatures.