This is the standard, round, full-size, one-piece valve that has been used successfully in columns around the world for over 50 years.
It is provided in several leg lengths to accommodate various tray deck thicknesses
It is normally dimpled to help prevent sticking to the deck, but can be flush-seated if needed
The orifice can be made to prevent the valve from spinning
Dual valve weights may be used in alternating rows to extend the already wide operating range