Proportional Valves
 IQ Valves's new breed of solenoid operated, patented proportional valves are unparalleled in the valve industry. Our proportional valve line outperforms the competition in many ways.
The critical specifications engineers evaluate when selecting a high performance proportional flow control valve are linearity, frequency response and hysteresis. Other important features are repeatability, power consumption, leakage, life expectancy and cost.
Engineers at IQ Valves have advanced the
proportional valves by designing units that meet the high performance end of all the above mentioned specifications while keeping the valve simple enough to hold costs down. IQ Valves has achieved an unparalleled linearity, an exceptionally high frequency response of 250 Hz. and low hysteresis using a unique solenoid construction.
True Proportionality
In the past, proportionality in valves was accomplished by using a proportional
solenoid or dithering an on/off solenoid. There are two types of proportional
solenoids. One uses a pulse-width modulated (PWM) electrical input signal to
eliminate the effects of stiction. This reduces the frequency response of the
valve. The second type of proportional solenoid eliminates stiction by suspending
the moving part (the armature) to eliminate metal-to-metal contact. While this has
been the preferred choice, it involves a complex design and is expensive to manufacture. Dithering puts more burden on the complexity of the electronic
circuitry and still does not yield the linearity needed in most closed-loop applications. For these reasons a truly proportional, more sophisticated, proportional solenoid such
as IQ Valves's is preferred.
Proportional Product Line
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