Overview: Q641F high platform pneumatic valve I plant using ISO5211 standard platform design, without connecting brackets and bushings, the actuator installation becomes simple. Q641F high platform pneumatic valve is widely used in natural gas, oil, chemical, metallurgy, paper making electricity office, mining, printing and dyeing, pharmaceutical, household chemicals, food and beverage, water treatment and air treatment industry automatic control or regulate fluid control, supporting the use of pneumatic and automation. Stem a leak-proof design, the use of anti-blowout stem design. 2, the first stage seal, the tapered stem gasket effectively prevents leakage of the medium during the rotation of the stem, and in the abnormal pressure state, are also effective in preventing leakage. 3, the second stage seal, a set of V-shaped composition after the filler is compressed to expand both sides, thereby preventing leakage. 4, the release of the disc spring preload, automatic compensation packing and stem seal wear. 5, using the stem nut pressed all stem seal system to prevent leakage. 6, only the back pad fixed stem nut to prevent its release. Design manual locking switch must be kept locked to prevent the risk of accidental misuse existing valve position. Ball platforms and handles with lock, padlock the valve in the closed position or open position locked. Actuator: A new series of GT / AT pneumatic actuator, double acting and single acting (spring return), rack and pinion drive, safe and reliable; AW series of large diameter valves using pneumatic actuator fork type transmission, reasonable structure, the output torque, a double acting and single acting (spring return).