Products Details

Power station stop valve, also known as power station regulating valve or Globe regulating valve, is an important valve widely used in the power industry, mainly used for accurate adjustment of the flow, temperature, pressure and liquid level of the medium. This valve has a variety of characteristics and advantages, suitable for high temperature and high pressure working environment, such as petrochemical industry, coal chemical industry, basic chemical industry, fine chemical industry, metallurgy, thermal power and other fields.

The structural features of the power station stop valve include the pressure self-tightening sealing structure, which makes the sealing performance of the valve improve with the increase of pressure. Both ends of the valve body and branch pipe are usually welded, and the sealing surface of the valve disc and seat is made of materials with good wear resistance, high temperature resistance and abrasion resistance, such as cobalt-based cemented carbide plasma spray welding. In addition, the valve stem has been tempered and surface nitriding treatment, with good corrosion resistance and abrasion resistance.

The working principle of the power station stop valve is to control the switching of the fluid through the valve driven by the motor. It is composed of motor, valve body, valve cover, valve stem and valve seat. When the motor starts, the spool or valve plate is lifted to allow the fluid to pass through; When the motor stops, the spool or valve plate is depressed and makes contact with the seat, preventing fluid flow.

When selecting a power station stop valve, it is necessary to consider factors such as its nominal diameter, nominal pressure, applicable temperature and main materials. For example, Hufa Holding Co., Ltd. provides the power station stop valve model J61Y, nominal diameter from DN20 to 300mm, nominal pressure from PN1.6 to 3.2MPa, suitable for high temperature and high pressure environment, the main materials include carbon steel, stainless steel, forged steel, chromium molybdenum steel and chromium molybdenum vanadium steel.

The selection and design of the power station stop valve is also very critical, and the type, specification and material of the valve need to be determined according to the specific working conditions and requirements. For example, the power station shut-off valve provided by Shanghai Yinai Company is suitable for thermal power plant high-addition drainage, reheater drainage and superheater drainage system, with high sealing requirements and fast opening and closing characteristics, and has fault protection function, automatic control function and high reliability.

There are also some precautions in the installation and use of the power station stop valve, such as the handwheel, handle operation of the stop valve can be installed in any position of the pipeline, but the handwheel, handle and transmission mechanism are not allowed to be used as lifting. The flow direction of the medium should be consistent with the direction indicated by the arrow on the valve body to ensure the normal operation of the valve and extend the service life.

Because of its high temperature and high pressure resistance, power station stop valve has been widely used in steel, chemical industry, metallurgy, thermal power generation and other enterprises. For example, the power station stop valve provided by China Guogong Holding Group is suitable for a variety of media, including water, oil and steam, with excellent sealing performance and corrosion resistance.

To sum up, the power station shut-off valve is one of the indispensable key equipment in the power industry, and its design, manufacturing and application need to be carried out in strict accordance with relevant standards and specifications to ensure its reliability and safety under harsh conditions such as high temperature and high pressure.