The types and applications of flange gate valves
Flanged gate valves are a type of gate valve connected by flanges. They mainly open and close by the vertical movement of the gate along the centerline of the passage and are widely used in the shut-off control of pipeline systems.
(Picture: Carbon steel flanged gate valve DN65)
Its types can be classified into two categories based on structural characteristics: according to the movement form of the gate stem, there are exposed stem and concealed stem types. When the exposed stem cast iron gate valve is opened or closed, the stem extends out of the valve cover, allowing for a direct observation of the opening degree. It is suitable for scenarios that require real-time monitoring, such as municipal water supply and drainage pumping stations. The stem of the concealed stem gate valve handwheel does not extend beyond the valve cover. It has a compact structure and is suitable for space-constrained occasions such as underground pipeline Wells and chemical plants with dense equipment. According to the structure of the gate plate, there are wedge type and parallel type. The wedge gate plate is wedge-shaped, with a tight seal fit, and is suitable for medium and high-pressure working conditions (PN1.6~16MPa). Among them, the elastic gate plate can compensate for the temperature gap and is often used in steam and hot oil transportation pipelines. Parallel gate plates have two parallel sides and are sealed by the pressure of the medium. They are mostly used in low-pressure and large-diameter scenarios with a diameter of DN300 or more, such as main water supply pipes. They have low opening and closing resistance and are suitable for frequent operations.
In application, due to the outstanding stability and cut-off performance of flange connections, they are widely used in many industries: concealed rod type or parallel gate plate type is commonly used in municipal and building water supply and drainage, as well as fire protection pipelines. In the petrochemical industry, wedge stem gate valves are often used in the transportation pipelines of crude oil and refined oil products under high-pressure conditions. In the field of power and energy, elastic wedge gate valves with better temperature resistance are often selected for power station cooling water and boiler steam pipelines. Low-pressure parallel gate valves with strong resistance to impurities are suitable for industrial wastewater and circulating water systems in metallurgy and water treatment. When making a selection, pressure, space and medium characteristics should be taken into account. Its reliable performance makes it a core control component of pipeline systems in various industries.
The type selection of flanged gate valves needs to take into account pressure, space and medium characteristics. Its reliable shut-off performance makes it a core control component in pipeline systems of various industries. If you have any related needs, please contact us below. As a 20-year-old Industrial gate valve manufacturer, Jinbin Valve provides you with professional solutions.（Gate Valve With Prices）
