The SHV4 manual needle valve of the steam turbine fire resistant oil system is a valve used for high-precision flow control. The needle type valve core adopts a ball pointed needle design, which has linear adjustment characteristics and high-precision control ability.

SHV4 needle valve, also known as globe valve or stop valve, is made of stainless steel and has characteristics such as corrosion resistance and wear resistance. It can adapt to harsh working environments such as high pressure, high temperature, and high viscosity. It is widely used in precise fluid regulation in industries such as chemical, power, petroleum, pharmaceuticals, and food.

Structure of SHV4 Needle Valve

The structure of SHV4 needle stop valve is very simple, mainly composed of valve body, valve core, valve seat, and handle. The key component is the valve core, which is a conical or needle shaped small hole. The valve core is usually made of stainless steel or other corrosion-resistant materials, and the surface is polished or treated to improve sealing performance. During normal operation, simply rotate the handle to drive the valve core to rotate, thereby accurately controlling the flow rate of the medium. The valve seat, also made of stainless steel, is matched with the valve core to achieve flow control and efficient sealing.

Advantages of SHV4 Manual Needle Valve

1. Easy to install and maintain: The SHV4 valve has a simple structure, small size, light weight, and is easy to install and maintain.

2. Good flexibility: The needle valve has flexible operation and can be manually controlled to open and close without the need for electrical or pneumatic assistance.

3. High reliability: The SHV4 needle valve has good sealing and stability, ensuring the safe operation of the system.

Application of Needle Valve SHV4 in Steam Turbines

The EH oil needle valve SHV4 is mainly used in the steam turbine DEH speed control system. EH oil is a high-pressure oil that can be controlled by adjusting its flow rate through the EH oil needle valve to control the operation of the turbine actuator. During the operation of the steam turbine, it is necessary to adjust it due to load changes or other reasons, and the EH oil needle valve is one of the key components used to achieve this function. For example, when it is necessary to replace the EH oil filters and servo valves in the system, the needle valve can be closed to cut off high-pressure oil circuit, and the actuator can be stopped when the turbine is running, and the operator can do the replacement.

It can be learnt that the application of SHV4 stainless steel needle valve in power plants is relatively advantageous. It can be used for flow and pressure regulation in various occasions, ensuring system stability and efficiency, and improving equipment reliability and safety. Meanwhile, due to its stainless steel material, it has characteristics such as corrosion resistance and high temperature resistance, making it suitable for use in various harsh environments.