Description
Flow Regulating Valve is a valve used to regulate and control fluid flow. It adjusts the fluid flow through the valve by changing the size or shape of the flow channel, thereby achieving precise control of the flow. Depending on the application requirements, the flow regulating valve can be manual or automatically controlled. Automated flow regulating valves are usually equipped with an actuator, which can receive signals from the control system and automatically adjust the opening of the valve to achieve remote control and precise adjustment of flow.
What is the function of the flow regulating valve?
The flow regulating valve has multiple functions in the fluid control system, including:
Adjust flow: The main function of the flow regulating valve is to control the fluid flow by adjusting the opening of the valve to meet process requirements. It can control the fluid flow within the set range and keep the system running stably.
Stable system pressure: In many fluid systems, stable flow often means stable pressure. By controlling the flow regulating valve, the pressure fluctuation of the system can be effectively stabilized to ensure safe and reliable operation of the system.
Energy saving and consumption reduction: Through precise flow control, the flow regulating valve can avoid unnecessary fluid waste, thereby achieving the effect of energy saving and consumption reduction.
Prevent overload: In some situations where equipment needs to be protected, by controlling the flow regulating valve, the equipment can be prevented from being overloaded due to excessive flow or pressure, thereby protecting the safety of the equipment.
Several driving methods of commonly used flow regulating valves:
There are various driving methods for flow regulating valves. Depending on the application requirements and site conditions, common driving methods include manual, electric, pneumatic and hydraulic. Each driving method has its unique advantages and applicable scenarios.
These driving methods are introduced in detail below:
Manual drive
Features:
– Manually adjust the valve core position through the handwheel or handle to control the flow.
– Simple structure, low cost, no need for additional power or gas source support.
– Suitable for occasions where the flow rate changes slightly and frequent adjustments are not required.
Applicable scenarios:
– Small equipment or systems with little flow change and low operating frequency.
– Places without power or gas supply, or environments where on-site maintenance is convenient.
Electric drive
Features:
– Driven by an electric actuator, the valve core position is adjusted by the motor to achieve automatic flow control.
– Can be connected to the control system to receive control signals (such as 4-20mA or 0-10V) to achieve remote or automatic control.
– Rapid response and high control accuracy, suitable for occasions requiring fine flow adjustment.
Applicable scenarios:
– Working conditions that require remote or automated control, such as industrial process control systems and building automation systems.
– An environment with sufficient power supply.
Pneumatic drive
Features:
– Driven by a pneumatic actuator, using compressed air as the power source, the position of the valve core is adjusted by controlling the pressure of the air source.
– Fast response speed, suitable for frequent switching situations.
– Pneumatic actuators are intrinsically safe (no risk of sparks) and suitable for use in flammable and explosive environments.
Applicable scenarios:
– Petrochemical, natural gas processing and other occasions where explosion protection is required.
– Control systems that require fast response, such as rapid switching or emergency shutdown applications.
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