3-Inch Stainless Steel L-Type Three-Way Ball Valve with Hard-Faced Seats for High-Temperature Steam Boiler Sampling

A pneumatic ball valve is driven by compressed air to open and close. The difference is: Pneumatic ball valve: faster response, better explosion-proof performance, but requires an air compressor. Electric ball valve: powered by electricity, no air supply needed, but slightly slower in action.

Single-acting (spring return): opens with air supply and closes automatically when air is cut off, safer for anti-leakage applications. Double-acting: opens and closes by air supply separately, and stays in position when air is cut off, with greater driving force and faster speed.

Yes, it can realize automatic switching. It is usually equipped with a solenoid valve; by powering on or off the solenoid valve, the air path is controlled to achieve automatic opening and closing. It can also be remotely controlled via PLC or control panel.

Most pneumatic ball valves are equipped with a manual override. In case of power failure, air cut-off or maintenance, the valve can be manually operated with a handle or handwheel for emergency use.

Cast iron: lower cost, only suitable for clean water, easy to rust, poor corrosion resistance. Stainless steel (304/316): rust-proof and corrosion-resistant, suitable for water, gas, oil and other media, more durable and longer service life. Stainless steel is strongly recommended for long-term use.