Insert for dynamic flow control

An insert for being mounted in a valve housing (80) or a tubular member for dynamic flow control of a flowing medium, which insert comprises:

• a first cup-shaped part (1) provided with an outflow area comprising at least one axial outflow slot (2) provided in a sidewall (3) of the first cup-shaped part;
• a second cup-shaped part (10) arranged axially displaceably within the first cup-shaped part (1) and provided with an inflow area;
• a pressure spring (30) arranged for exerting a force (f) that seeks to force the two cup-shaped parts (1, 10) away from each other;
• said second cup-shaped part (10) being configured such in relation to the first cup-shaped part (1) that the at least axial outflow slot (2) provided in the sidewall (3) of the first cup-shaped part (1) is closed in response to a displacement of the second cup-shaped part (10) in relation to the first cup-shaped part (1),
• wherein the inflow area of the second cup-shaped part (10) comprises at least one axial inflow slot (12) provided in a sidewall (18) of the second cup-shaped part (10), which inflow slot (12) is closed in response to the displacement of the second cup-shaped part (10) in relation to the first cup-shaped part (1).