Discontinuous sampling arrangement for product line - has blocking and dispensing element which seals product line outlet before reaching its closed position

摘要

An arrangement for manual discontinuous sampling from a product line contains a blocking device (17) movable between open and closed positions protruding into the product line (1) cross-section between its outlet (4) and a sampling aperture (7). The blocking and dispensing element is formed in a recess (20) which neither increases nor decreases the line's cross-section in the closed position. As the element moves towards the open position, the product line outlet is sealed w.r.t. the recess and extraction aperture before the closed position is reached. ADVANTAGE - Reliable and safe in operation despite simple design.