Servo-positioner for a micro-regulating valve

A servo-positioner for a micro-regulating valve, said servo-positioner comprising:

• a digital control system configured to operate at high pressure rates and at high pressure and micro flow rates;
• a servomotor having a shaft, said shaft having a first end and a second end opposite said first end;
• a micrometric valve having a rod and a needle, and being connected to said first end of said shaft of said servomotor;
• a coupling part;
• and
• a high resolution encoder coupled to said servomotor at said second end of said shaft by said coupling part, so as to know, at any time, the position of said micrometric valve, wherein said high resolution encoder continuously measures and retransmits the position of said shaft of said servomotor, and therefore, the distance between the rod and an opening of the micrometric valve to said digital control system, said opening being made of polyetheretherketone,
• wherein said needle of said micrometric valve progressively adjusts an opening as said needle shifts position, generating a flow-through varying in cross-section based on the proportion in which said needle has shifted position, said needle being moved by a turning action of said rod by a micrometric screw,
• a support secures said micrometric valve to said servomotor,
• a flexible coupler connects said micrometric valve to said shaft of the servomotor, thus enabling forward and backward movement of said rod of said micrometric valve, and
• wherein said control system comprises a comparator which recursively and automatically compares a control signal received from an external control system and the position of the rod of the micrometric valve read by the high resolution encoder calculating a number of steps that the servomotor has to move the rod for adjusting the position of the micrometric valve.