FAQ

• 3/4/5 Port Solenoid Valves
• Fieldbus System/
  Serial Transmission System
• Air Cylinders
• Auto Switches
• Rotary Actuators
• Vacuum Equipment
• Air Dryers
• Regulators
• Modular F.R.L.
• Boosters
• Auto Drain
• Fittings
• Pressure Switches
• Flow Switches
• Process Valves
• Chemical Liquid Valves
  (Fluoropolymer Equipment)
• Temperature Control Equipment
• Electric Actuators

|Regulators

There is a buzzing noise from the ITV when the power is ON with no air supply or no input signal. What is the problem?

Depending on the change in atmospheric pressure and temperature, the pressure sensor zero point may fluctuate and it may cause the internal ITV solenoid valves to operate to achieve OUT pressure proportional to the input signal of "0 MPa". This may adversely affect the product life.
Also, if the ITV minimum adjustment pressure parameter is not 0 MPa (e.g. F_1=0.1 MPa), with no input signal, the ITV will try to achieve the target pressure of 0.1 MPa by operating the solenoid valve ON/OFF all the time (a buzzing noise) but never increasing the pressure as there is no air supply pressure.
In all these cases, please turn OFF the voltage power supply.