Program control valves specially developed by Techairs adopt the world’s advanced low flow resistance valve body, streamlined flow channel, combines with anti-erosion, anti-fatigue technology, and features fast valve switching speed, good sealing performance, two-way pressure capacity and anti-high-speed airflow capacity. The number of times of leak-tightness of the switch exceeds 1,000,000.J641A/J641B/J641C products are specially used for PSA, with good sealing performance, short action time, erosion resistance, pressure resistance, temperature resistance.