Irreversibly closable flow control clamp

A fluid processing set comprising:

• a container adapted for receiving biological fluid from a donor;
• a donor access device;
• a tubing segment defining a flow path that is in flow communication with said container and said access device;
• and
• a flow control clamp associated with said tubing segment, said clamp comprising:
• a body having a first leg and a second leg, said legs being movable from a first spaced apart position to a second irreversibly closed position wherein one of said first and second legs includes in an inwardly extending member having an engagement member and the other of said first and second legs includes a pair of inwardly extending members, one of said pair of inwardly extending members including a first surface engaged by said engagement member when said device is in said second irreversibly closed position and the other of said pair of inwardly extending members limits movement of said inwardly extending member having said engagement member away from said first surface and prevents disengagement of said engagement member from said engagement surface;
• at least one opening provided in said body for receiving said tubing segment therethrough and between said legs;
• and
• at least one tube contacting member carried by one of said legs for clamping said tubing segment when said legs are in the second irreversibly closed position.