Southern Cross JCD-900 Series, Инструкция по эксплуатации

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LGCY Series Page 15
Function: for ensuring the compressor normally operates under the set rated pressure.
A. LOAD/UNLOAD switching valve
The LOAD/UNLOAD switching valve is manual and used to switch load/unload. Unload during startup
and before shutdown, and load during working time. The equipment full-automatically regulates the
operation relying on the proportional valve. Two-position and three-way switching valve has the
function of air release valve during shutdown.
B. Proportional valve
The proportional valve is a pressure regulating valve, which is a key component for pressure control. It
converts the working pressure (input pressure) into control pressure (output pressure), and the output
pressure decides the amount of expansion and contraction of two servo cylinders.
C. Air intake valve servo cylinder
The servo cylinder is the actuator. The air intake valve servo cylinder controls the opening degree of the
intake valve disc according to the output pressure of the pressure regulator, thereby controlling the
intake air amount.
D. Air release valve
The vent valve is installed behind the oil core and in front of the minimum pressure valve. It is also
controlled by the pressure regulator output pressure, and vents to the atmosphere in time to gradually
reduce the pressure in the oil-air tank.
E. Safety valve
The safety valve is a component that ensures the safe operation of the equipment and does not operate
under normal working conditions. If the safety valve continuously operates, the cause should be checked