Electro-hydraulic regulating valve - has servo to drive worm gear connected via nut to valve piston

摘要

The housing (1) has a feed pipe (2) and an outlet pipe (3) for hydraulic fluid. A valve chamber (4) contains a valve seat (5) located between inlet (2) and outlet pipes, and a valve cage (6) acted on by a spring and in contact with a control piston (10), beyond the bearing surfaces of which (11) is formed a control chamber (12). Hydraulic pressure in the control chamber is generated by an electrically controlled servo (13). This consists of a chamber (15) filled with hydraulic fluid, a pressure line (16), an electric servo motor (30) which drives a worm gear (25) with nut (31), which connects with a piston (17),. USE/ADVANTAGE - Sensitive, fast, accurate and reliable regulation of vavle. Low energy loss.