Proportional Flow Control Valve

  • Proportional solenoid valve:

The proportional solenoid converts the input current signal into a mechanical signal output, and then controls the flow. This type of proportional valve has fast response time, compact in size, and is suitable for installation on manifolds. Available flow ranges are 0-32L/min, 0-140L/min, 0-300L/min.

  • Stepper-controlled proportional valve:

Kao Lu stepper-motor driven proportional valves control flow ranging from 0 to 20 LPM, 120 LPM, 300 LPM and up to 1000 LPM. Our stepper-motor driven proportional valves are ideal for controlling a variety of media such as water, gas, oil, etc. Kao Lu stepper-motor driven flow proportional valves also have the advantages of low hysteresis (<2%) and high resolution (20ml/min).

Proportional Flow Control Valve Applications

Proportional flow control valve is widely used in medical equipment or industrial applications, such as: gas-control welding equipment, ventilation equipment, laser machines, gas mixing, painting/spray equipment, semiconductor equipment, analytical equipment, anesthesia equipment, nebulizer, respiration measurement, etc.
Proportional Solenoid Valve 0-32L/min
Miniature Proportional Valve 0-32L/min
Proportional Solenoid Valve 0-90L/min
Mid Flow Proportional Valve 0-130L/min
Proportional Solenoid Valve 0-300L/min
High Flow Proportional Valve 0-300L/min
Stepper-Controlled Proportional Valve 0-600L/min
Stepper-Controlled Proportional Valve 0-600L/min
Stepper-Controlled Proportional Valve 0-3200L/min(new)
Stepper-Controlled Proportional Valve 0-600L/min(new)

Introducing latest Stepper-Controlled Proportional Flow Control Valve

What is a Stepper Motor?

Stepper motors are brushless DC motors that rotate in steps electronically set by a controller or drive. Stepper motors are ideal for applications that require speed and precise position control, especially at low speeds such as in automation, motion systems, and 3D printers. Due to their internal design which minimizes mechanical and electrical "delays" that occur in other motors, stepper motors have remarkable stopping accuracy and responsiveness. Often, this makes stepper motors an ideal choice for synchronous and high precision operations.

Energizing the coils of a stepper motor in the right sequence to achieve a single step is a complex task. KaoLu provides PM series stepper motor controller that allows you to solve this task. There are two types of stepper motor drives—constant voltage (L/R drive) and constant current (chopper drive). If you're interested in learning more, please refer to our News section.

Drivers simplify the operation of a stepper motor by interpreting a digital step and direction signal from a controller and energizing the motor coils accordingly. All electronics are governed by Ohm's Law and the relationship between current rise and inductance. With stepper motors, the motor's design (in regard to its coils) prevents current from increasing quickly during pulses (command signals), which means the current can never reach its peak value without very high voltage. This is a problem because without sufficient current, the torque will be low, especially at high motor speeds. To combat this, chopper drives perform what is known as Pulse Width Modulation (PWM).
Motor Type
KaoLu’s FC series proportional flow control valve utilizes an ultra fine thread, which is smooth, proportional, accurate, and stays in the position with high torque.
Now, couple that with a stepper motor that gives you precision, speed, and is ultimately automated with any bipolar chopper drive you wish to use.
Anywhere there is a needle valve that is controlling the flow of gas, can now be remotely located, automated, monitored and automatically adjusted to meet whatever demand you have in your application. Four of the main advantages of this our proportional flow control valve are; System Integration, Very Low Hysteresis, Low Power consumption, & Specific Flow Curve cababilities exceeding 1000 LPM.
Please visit our video for a demo: