China Custom Stop Valves Suppliers Manufacturing For Sale
The valve body is the main housing of the China stop valve, providing a sturdy enclosure for the internal components and facilitating the connection to the pipeline. It is typically made of cast iron, ductile iron, carbon steel, or stainless steel, depending on the application requirements and the fluid being handled. The valve body is designed to withstand high pressures and temperatures encountered in industrial environments.
The bonnet is a cover that encloses the valve internals and provides a mounting point for the actuator. It is usually bolted or threaded to the valve body and can be removed for maintenance or repair of the internal components. The bonnet helps protect the valve stem, packing, and other internal parts from external damage and contamination.
The stem is a cylindrical shaft that connects the actuator to the movable element of the valve, such as the gate or disc. It transmits the actuating force from the actuator to the valve internals, allowing for the opening and closing of the valve. The stem is typically made of stainless steel or other corrosion-resistant materials to withstand the rigors of operation.
The gate or disc is the movable element of the China stop valve that controls the flow of fluid through the valve body. In a gate valve, the gate is a flat or wedge-shaped barrier that moves perpendicular to the direction of flow to open or close the valve. In a globe valve, the disc is a circular or spherical component that moves linearly to regulate flow. The gate or disc is designed to create a tight seal against the valve seat when closed, preventing leakage.
The seat is a sealing surface located within the valve body against which the gate or disc makes contact when closed. It ensures a tight seal to prevent fluid from leaking past the gate or disc when the valve is shut. The seat is typically made of resilient materials such as brass, bronze, or elastomers, which provide a secure seal even under high pressures and temperatures.
The actuator is a mechanism that controls the movement of the valve's movable element, such as the gate or disc. It can be manually operated, using a handwheel or lever, or automatically operated, using pneumatic, hydraulic, or electric actuators. The actuator provides the force necessary to open or close the valve and may include additional features such as position indicators or limit switches for remote monitoring and control.
Packing is a sealing material used to prevent leakage along the stem of the China stop valve. It is typically made of flexible materials such as graphite, PTFE (polytetrafluoroethylene), or braided packing yarns. Packing is installed around the stem within the bonnet and compressed against the stem to create a seal. It helps maintain the integrity of the valve by preventing fluid from escaping into the environment.
The yoke is a structural component that supports the bonnet and actuator assembly above the valve body. It provides stability and rigidity to the valve assembly, especially in larger sizes or high-pressure applications. The yoke is usually bolted or welded to the valve body and may include provisions for mounting accessories such as handwheels or actuators.
Many China stop valves feature a bolted bonnet design, which allows for easy access to the valve internals for maintenance or repair. The bonnet is secured to the valve body using bolts or studs, which can be removed to disassemble the valve for servicing. This design facilitates quick and convenient maintenance without the need for specialized tools or equipment.
In some China stop valves, the stem is designed as a rising stem, meaning that it moves vertically as the valve is opened or closed. This rising stem design provides a visual indication of the valve position, allowing operators to easily determine whether the valve is open or closed by observing the position of the stem relative to the valve body.
