The structural features of stop valves mainly include the following aspects:
Simple and compact structure: The stop valve is mainly composed of valve body, valve cover, valve disc, valve stem and packing. It has a simple and compact structure, occupies a small space, and is easy to install and maintain.
Low fluid resistance: In a straight-through stop valve, the fluid channel is parallel to the valve stem axis, the flow is relatively smooth, and the fluid resistance is small; the fluid channel of the DC stop valve is perpendicular to the valve stem axis, and the fluid resistance is also small, which is suitable for occasions with high requirements for fluid resistance.
Good sealing performance: The sealing surface of the stop valve usually adopts metal-to-metal sealing or soft sealing, which has good sealing performance and can effectively prevent fluid leakage.
Flexible operation: The stop valve can be operated manually, electrically, pneumatically, etc. When operated manually, the valve stem and valve disc are driven up and down by rotating the handwheel to open and close; electric and pneumatic operations can realize remote control and automatic operation, improving work efficiency and operation accuracy.
Good adjustment performance: The valve disc of the stop valve has a short stroke, and the flow and pressure of the fluid can be accurately controlled by adjusting the opening height of the valve disc. It is suitable for occasions where the flow needs to be accurately adjusted.
High pressure and high temperature resistance: According to different materials and structural designs, the stop valve can withstand higher pressure and temperature. For example, the stop valve made of alloy steel, stainless steel and other materials can operate stably for a long time in harsh environments with high temperature and high pressure.
Wide range of application: The stop valve is suitable for various fluid media, including water, steam, oil, etc., and is widely used in petrochemical, electric power, metallurgy and other industries.