Together with its joint-venture partner DS Control Technologies (Novgorod, Russia), this firm has recently demonstrated a new benchmark in large-valve positioner accuracy. The Smart Valve Interface II Advanced Performance (SVI IIAP) positioner controls a massive ANSI 150 measurement AST ball valve — the largest valve in a natural-gas-compression station designed by contractor Kukdumalakgaz in Uzbekistan. The double-acting positioner delivers a 0.3% valve-control accuracy rate, which is an order of magnitude above the average of 1–3% for this type of application, says the firm. The built-in self-calibration and self-tuning functionality also makes installation and setup easier. The SVI IIAP positioner integrates with the AST valve configuration that includes a Servovalve Engineering actuator and two volume boosters. — Dresser Masoneilan, Houston, Tex.
This large control valve has a high accuracy
| By Chemical Engineering