It incorporates a unique shut off valve which automatically controls the vacuum supply to each liner during milking; as soon as the teat enters the liner the valve automatically opens. When the teat is removed at the end of milking rapid air intake creates a vacuum in the valve which automatically closes it. During washing there is a small lever which must be pushed down to prevent the valve from closing due to water turbulence.
Milfos also recommend a snap clamp is used to enable a complete vacuum shutoff during machine start up. The cluster is made of tough impact resistant plastics and has a silicone liner which is easily replaceable.
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