ventiel

Ventiel (valve) is a device designed to control the flow of liquids or gases by opening, closing, or partially obstructing passageways. Valves are essential components in plumbing, heating and cooling systems, water treatment, oil and gas production, chemical processing, and various industrial applications. They regulate pressure, direct flow, prevent backflow, and protect equipment by relieving excess pressure or isolating sections of a system.

Valves are commonly classified by function. Isolation valves stop or start flow; control valves modulate flow or pressure in a process; check valves permit one-way flow and prevent reverse movement; safety or relief valves release fluid when pressure exceeds a set limit; and balancing or regulating valves help maintain desired flows and pressures within a system. Actuation methods vary from manual operation, using a handwheel or lever, to automated actuation by electric, pneumatic, or hydraulic actuators. Smart valves can be controlled remotely and integrated into automatic control systems.

Key components include the valve body, bonnet, stem, disc or plug, seats, and packing or seals. Material selection depends on the media, temperature, and pressure, with common choices such as brass, bronze, stainless steel, and plastics like PVC, CPVC, or PVDF. Sealing surfaces and seat design influence shutoff reliability and service life. Valves are rated for specific media compatibility, pressure classes, and temperature ranges, and they often conform to standards from ISO, ASME, API, or DIN.

Maintenance involves checking for leaks, corrosion, or wear, replacing packing or seats as needed, and ensuring actuators and controls respond correctly. Proper installation, orientation, and compatible piping are essential for reliable valve performance.