Valve accessories

Valve accessories refer to various parts used for installing, repairing and operating valves. They play a vital role in the valve system and can improve the performance, reliability and safety of the valve. The following are some common valve accessories and their functions:

1. Main structural components

Valve body: The main part of the valve, used to connect the pipeline, contains fluid channels and control elements inside.

Valve cover: Covers the valve body, protects the internal components of the valve, and provides sealing.

Valve stem: Connects the valve handle or actuator with the valve body, and controls the opening and closing of the valve by rotation or movement.

Valve disc/valve plate: Located in valves such as stop valves and butterfly valves, it controls the flow of fluid by rotation or lifting.

Valve seat: Located on the valve body, in contact with the valve disc or valve ball to achieve sealing.

2. Sealing components

Sealing ring/sealing pad: Used for valve sealing to ensure the airtightness of the valve and prevent fluid leakage. Common materials include rubber, polytetrafluoroethylene, etc.

3. Operating components

Handle: Used to manually operate the valve to transmit the force of rotation or movement to the valve stem.

Actuator: used to automatically control the opening and closing of the valve, and drive the movement of the valve stem according to the input signal. Actuators can be divided into many types, such as pneumatic actuators, electric actuators, hydraulic actuators, etc.

4. Other auxiliary components

Spring: used to provide elastic force in some valves to keep the valve in normal working condition.

Positioner and accessories: such as pneumatic valve positioner, electrical valve positioner, intelligent valve positioner, etc., used to accurately control the opening of the valve.

Bolts, nuts, clamps: used to fix and connect various parts of the valve.

Packing, packing: used for sealing between the valve stem and the valve cover to prevent fluid leakage.

Flange: used to connect the valve to the pipeline or other equipment.

5. Special purpose parts

Valve muffler: used to reduce the noise generated when the valve is opened or closed.

Flowmeter, pressure gauge: used to measure and control the flow and pressure of the fluid.

There are many types of valve accessories, and their use depends on different types of valves and application scenarios. These accessories work together to ensure the normal operation of the valve and achieve accurate control and regulation of the fluid. When selecting valve accessories, it is necessary to comprehensively consider factors such as specific use conditions, fluid properties and safety requirements.