FLOW GOVERNOR Russian patent published in 2001 - IPC

FIELD: control over flow of liquid. SUBSTANCE: flow governor has body 7, first and second throttling zones located in body 7. Hydraulic drive 12 controls pressure differential by means of first throttling zone 8,9 via second throttling zone 4, 5 till constant value is set. Hydraulic drive 12 is fitted with membrane 11 one side of which forms wall of first pressure chamber 13 communicating with intake chamber 2 of flow governor. The other side of membrane 11 forms wall of second pressure chamber communicating with chamber 18 behind second throttling zone 4,5. Membrane 11 is linked by means of tie-rod 10 with regulation cone 9 which is element of first throttling zone 8, 9. Second throttling zone 4,5 has cone 4 which is mounted for stepless axial displacement with reference to hole 5 with the use of drive of valve with the help of axle 21 of valve. Cone 4 of second throttling zone 4 has two separate parts 22, 23 as minimum which are mounted for displacement, one relative to another. Effective cross-section of zone 4, 5 can be varied by change of clearance between separate parts 22, 23. EFFECT: invention renders flow passing through flow governor independent of pressure differential with preservation of entire control range. 7 cl, 3 dwg