３．
Construction and Operation Principles
When the knob is rotated, the flapper is pushed through the spring, and a gap is generated
between the nozzle and flapper. The supply pressure flows to the inlet passes through the path
between the nozzle and flapper and acts on the supply / exhaust diaphragm as nozzle pressure.
The force generated by the diaphragm pushes down the valve, and the supply pressure flows to
the outlet. The discharged air pressure acts on the static pressure chamber side of the supply/
exhaust diaphragm, and counteracts against the force generated by the nozzle back pressure
chamber side. The air pressure acts on the nozzle diaphragm at the same time, and counteracts
against the compression force of the adjusting spring to adjust the set pressure. When the set
