pneumatic control system การใช้

-During the year, the company installed microprocessor based digital integrated distributed control system in catalytic reformer and new solvent unit which replaced the pneumatic control system.
By 1985, pneumatic controls could no longer compete with this new technology although pneumatic control systems ( sometimes decades old ) are still common in many older buildings.
The pneumatic control system automatically threw open the LOX boil-off valve to vent tank pressure, which apparently continued until the tanks lost support pressure to the point where their structural integrity failed.
The electro-pneumatic control system ( coded Yellow Triangle ) allowed only one trailing locomotive to be controlled ( by one driver ) : some trains were operated by three locomotives ( all at the front of the train ), but in these cases only two locomotives were connected in multiple, the third having a separate driver.