A pressure seal gate valve is a type of gate valve that is designed to withstand high-pressure and high-temperature applications. It typically features a bolted bonnet and a pressure seal gasket that creates a tight seal when the valve is closed.
The main components of a pressure seal gate valve include the body, bonnet, gate, stem, and seat. The body and bonnet are usually made of forged steel or cast steel, which provides high strength and durability. The gate is typically made of solid or flexible wedge, depending on the application requirements.
The stem is connected to the gate and is used to move it up and down to open and close the valve. The stem is often equipped with a backseat design, which prevents the stem from being ejected when the valve is fully open. The seat is located at the bottom of the valve body and provides a sealing surface for the gate to close against.
The pressure seal gate valves operate by rotating the stem to lift the gate off the seat, allowing the fluid or gas to flow through the valve. To close the valve, the stem is rotated in the opposite direction, causing the gate to move back down onto the seat, sealing off the flow.
Overall, the pressure seal gate valve is a robust and reliable valve design that is commonly used in high-pressure and high-temperature applications, such as in power plants, oil and gas pipelines, and petrochemical processing facilities.
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