What is SDV Valve?

SDV Valve is a kind of safety equipment commonly used in petrochemical, pharmaceutical, food and other industries as well as offshore oil platforms, the full name is “shut-off valve”, and the Chinese name is cut off Valve or Shut off valve. The following is a detailed introduction to the SDV valve:

First, composition and structure

SDV valve is mainly composed of two parts: the actuator and the valve body. The actuator includes a piston, a spring and a hand, and an automatic switching part. It is a pneumatic actuator of the air opening type, and is equipped with a solenoid valve to open or close the gas path, which is used to control the opening or closing of the valve.

Second, the working principle

The operating principle of the SDV valve is based on the pneumatic actuator. After receiving the instruction of the FSC system or the emergency shutdown system (ESD), the valve is automatically opened or closed by controlling the on-off of the compressed air source through the solenoid valve.

Third, function and application

The SDV valve plays the role of emergency shutdown protection in the system, and is generally located on the exit pipeline of the equipment. When abnormal conditions occur, it can quickly cut off the air source loop to prevent the medium from continuing to flow, thus ensuring the safety of the system.

SDV valves are widely used in offshore oil platforms as well as in the onshore petrochemical industry. On offshore oil platforms, large SDV valves (e.g., valve size ≥16 inches, pound class ≥900LB) are usually located at the exit of the pigging ball launcher or at the entrance of the pigging ball receiver, and are important safety equipment in the process.

Fourth, characteristics and advantages

The SDV valve has the characteristics of safe, reliable and easy maintenance of the pneumatic actuator, especially suitable for dangerous areas.

SDV valves are only fully open and fully closed, so they are also known as two-position valves. This design enables SDV valves to perform well when the medium flow needs to be cut off quickly and accurately.

To sum up, SDV valves are an important safety device that plays a key role in the petrochemical, pharmaceutical, food and other industries, as well as in offshore oil platforms. It realizes the automatic opening or closing function through the pneumatic actuator, has the characteristics of safety, reliability, easy maintenance, and can quickly cut off the medium flow in emergency to ensure the safety of the system.