Metal Valve

Start by defining the required function: isolation, throttling, automated control, backflow prevention, air release or filtration. Then confirm the process medium, pipe diameter, operating pressure, temperature, connection standard, body material and actuation method.

Gate valves, ball valves and butterfly valves are commonly used for pipeline isolation. Gate valves are generally selected for full-open or full-close service, ball valves provide fast quarter-turn shut-off, and butterfly valves offer a compact solution for larger pipe sizes. Final selection must be based on the actual operating conditions.

Globe valves and electric control valves are generally more suitable for throttling and modulating control. Standard gate valves are intended primarily for isolation rather than continuous throttling service.

Electric valves use an electric actuator and can be integrated into PLC, DCS, BMS or SCADA systems. Pneumatic valves use compressed air and are suitable for fast, repeatable operation. The preferred actuator depends on available utilities, operating speed, control signal and fail-safe requirements.

An air vent valve automatically releases trapped air from a closed piping system. It is normally installed at pipeline high points to help prevent air lock, flow interruption, pump cavitation and pressure surges.