PGD PGS series are the pneumatic actuators designed using a scotch-yoke technology from PGD PGS 50 to 200. Scotch-yoke technology is well-known as the most suitable actuator mechanism for valve and damper operation because it can produce a higher torque at both end positions. All specifications follow international standards to mount the valve accessories like solenoid valves, limit switches, valve positioners. Torque is available from 10Nm through 4000Nm double acting and from 5Nm through 1900Nm spring return. The operating ambient temperature range is -20o C~ +80o C as standard (For higher and lower temperature applications, please contact us before placing order). Mounting dimensions follow standards of ISO5211, DIN3337, NAMUR and VDIVDE3845. The drive shafts can be provided in various sizes with double square shaped female bore to accomodate valve shaft. Spring package is pre-compressed for safety. Extremely long service life and reliable performance. POWER-GENEX Ltd. also provides LSB series limit switch boxes (weather proof, explosion proof), solenoid valves and valve positioners. Side hand-wheel and de-clutchable gear box for manual operation are also optionally available.