ohjausventtiiliä

An ohjausventtiili, or control valve in English, is a crucial component in many industrial and hydraulic systems. Its primary function is to regulate the flow, pressure, or temperature of a fluid, such as oil, water, or gas, by varying the size of the flow passage. This regulation is typically achieved through a movable element, like a spool, plug, or diaphragm, that obstructs or opens the fluid path in response to a control signal.

Control valves are actuated in various ways. They can be manually operated, mechanically driven, or, most commonly, pneumatically or electrically actuated. Electrical actuation often involves a solenoid or an electric motor, while pneumatic actuation uses compressed air. The control signal can originate from a manual setting, a feedback loop from a sensor monitoring the system's state, or a programmable logic controller (PLC).

The design and type of an ohjausventtiili are dependent on the specific application requirements. Common types include directional control valves, which direct flow to different parts of a system, proportional valves, which offer precise control over flow rate or pressure, and servo valves, which provide highly accurate and rapid response. Safety relief valves are another important category, designed to open automatically when system pressure exceeds a predetermined limit, preventing damage or hazardous situations. The selection of an ohjausventtiili involves considering factors such as flow capacity, operating pressure, fluid type, required response time, and environmental conditions.