초록 ▼

The invention concerns a device for controlling a fluid flow, characterised in that said device comprises second valve arrangement means interposed in the circuit in series with first valve arrangement means (20, 22, 34), and wherein a second mobile closure element (38) moves between a pressing posi

The invention concerns a device for controlling a fluid flow, characterised in that said device comprises second valve arrangement means interposed in the circuit in series with first valve arrangement means (20, 22, 34), and wherein a second mobile closure element (38) moves between a pressing position, wherein it is pressed on the seat (32) of a second threshold (30) and an opening position wherein the second closure element (38) is spaced apart from the second seat (32) to allow the fluid through the second threshold (30), and in pressing position, the second closure element (38) allows a reduced flow of the fluid through the second threshold (30).

대표청구항 ▼

The invention concerns a device for controlling a fluid flow, characterised in that said device comprises second valve arrangement means interposed in the circuit in series with first valve arrangement means (20, 22, 34), and wherein a second mobile closure element (38) moves between a pressing posi

The invention concerns a device for controlling a fluid flow, characterised in that said device comprises second valve arrangement means interposed in the circuit in series with first valve arrangement means (20, 22, 34), and wherein a second mobile closure element (38) moves between a pressing position, wherein it is pressed on the seat (32) of a second threshold (30) and an opening position wherein the second closure element (38) is spaced apart from the second seat (32) to allow the fluid through the second threshold (30), and in pressing position, the second closure element (38) allows a reduced flow of the fluid through the second threshold (30). by the process fluid. 7. A swivel apparatus according to claim 6, characterized in that each of the dynamic sealing means (21) consists of at least one primary and one secondary seal (38 resp. 39; 48 resp. 49) which are placed side by side between the distance ring (4) and the axial bearing (17). 8. A swivel apparatus according to claim 5, characterized in that at least some of the sealing means (21, 24) are arranged to be activated by means of a barrier liquid having a higher pressure than the process fluid. 9. A swivel apparatus according to claim 8, characterized in that the axial bearing (55) is placed between a radially inner and a radially outer seal (49 resp. 50), the bearing (55) being a roller bearing which is arranged to be lubricated by a barrier liquid in the form of oil. 10. A swivel apparatus according to claim 8, characterized in that the axial bearing is a roller bearing (54; 55) and the radial bearing is a sliding bearing (53).