1100 SERIES Power Cylinder with Electro Pneumatic Positioner
Power cylinder consists of double acting cylinder with different mountings and having modified Valve positioner /Electro Pneumatic converter with a provision to increase the functional strokes as desired. Piston rod carries a ball socket joint for making a flexible connection with the final control element such as a Damper / Butterfly / Ball / Plug valve & other Rotary & Linear devices where automation is needed. If the cylinder is assembled with positioner alone then input to the positioner is 3 to 15 psig (0.2 to 1.0 kg/cm) and supply pressure to the positioner may vary form 4 to 6kg/cm and Filter Pressure Regulator is provided to maintain the set air supply pressure as required. If the cylinder is assembled with Electro Pneumatic converter then Inputs to it will be 4-20mA and 6.0 to 8.0kg/cm air pressure. Valve positioner incorporates a four way relay, zero and range adjustments and two pressure gauges to indicate pressures on both sides of stroke requirement. Additional accessories can be provided such as Air-locks to obtain stay put fail safe position, boosters to increase stroking rate, limit switches etc.
Clean and dry instrument air is generally adequate for cylinder operation. Air lubricator is recommended for cylinder size above 4‚ÄĚ or where piston rings need lubrication.
Maintenance generally is negligible except for routine cleaning of the piston rod a drop of oil is sufficient for smooth movement. Once a while a few drops of lubrication oil if filled in the cylinder [when external air lubricator is not used] to give a satisfactory performance over a long period. Unit is supplied fully calibrated and piped with accessories. If any field calibration becomes necessary the setting could be field adjusted. These cylinders are made of high quality seamless tubes and give a long service life without much maintenance. Every cylinder undergoes repeated inspection and 100% testing before dispatch.
Maximum Working Pressure: 150 psig Maximum Working Temperature: 80 C, for higher the viton sealing is used or with standard seals the mounting position of the cylinder is selected in such a way were high temperature is not in contact.
Control Signal Pressure range : 3 to 15 psig [0.2 to 1.0kg/cm g]
Air consumption : SCFM [1.76NMCH] of free air at 80 psig [5.6kg/cm g]
Thrust-available thrust may be considered as 70% of Cylinder bore area multiplied by operating air pressure.