A trunnion mounted ball valve is a type of ball valve where the ball is supported by trunnions (pins) at the top and bottom, rather than floating freely within the valve body. This design allows the ball to remain fixed in place and reduces the stress on the ball during operation. The trunnion mounted configuration makes it ideal for high-pressure, high-flow applications, as it requires less torque to operate compared to a floating ball valve. In a trunnion mounted ball valve, the ball is attached to two fixed supports, or trunnions, which are typically connected to the valve body. These trunnions allow the ball to rotate with minimal movement, ensuring a reliable seal and preventing wear caused by axial motion. The design offers a significant advantage in large diameter valves or high-pressure systems where torque would otherwise be excessively high.

Cast Iron Dual Plate Check Valve is a type of check valve designed to allow fluid (typically liquid or gas) to flow in only one direction and prevent backflow. The "dual plate" refers to the valve's internal mechanism, which consists of two hinged plates that open to allow fluid flow and close to prevent reverse flow. As a check valve, its primary function is to prevent backflow. The dual plates open when the flow is in the intended direction, and they automatically close when the flow reverses, preventing reverse flow or siphoning.

An API Bellows-Sealed Globe Valve is a specialized type of globe valve that meets the requirements of the American Petroleum Institute (API) standards, commonly used in the oil, gas, and petrochemical industries. The primary feature of this valve is the metallic bellows seal, which ensures that the valve stem area is sealed effectively, preventing leakage of hazardous fluids or gases.