The Model 91-HF Filter-Regulator is designed to provide clean, accurate air pressure to instruments, valves, and other automatic control equipment.
The Model 2306 instrument air filter is used to remove dirt, oil, water, and other impurities from an instrument-air supply.
The Integral Volume Booster was designed for use on pneumatic actuators that require high flow for fast stroking times. The unit reproduces pneumatic signals in a 1:1 ratio for applications requiring increased flow capacity, while maintaining small step accuracy and reducing piping requirements.
When a Double Acting SIPART PS2 is used with a Single Acting actuator, the following must be considered:
With loss of supply air the Double Acting SIPART PS2 will lock in the last position. This prevents the actuator spring from returning the valve to its fail-safe position. By using the "venting" gauge block and properly piping the positioner to the actuator the air on the side opposite the spring can be exhausted back through the air supply line.