Industry Information
Introduction:
Wedge gate valve is a type of gate valve. It is named because its sealing surface is at an angle to the vertical centerline, i.e. the two sealing surfaces are wedge-shaped. In general, for a gate valve with two sealing surfaces forming a wedge shape, the angle between the sealing surface and the vertical centerline is 2 ° 52 ', 3 ° 30', 5 °, 8 °, 10 °, etc. Wedge gate valves are divided into rising stem gate valves and non rising stem gate valves, wedge single gate valves, and wedge double gate valves. The driving methods include: electric, pneumatic, manual, pneumatic, etc. The connection methods include flange type, welding type, and wafer type.
Structural features:
Unlike parallel gate valves, wedge-shaped gate valves also have wedge-shaped single gate valves. The two sealing surfaces of the most commonly used wedge gate valve form a wedge shape, and the wedge angle varies depending on the valve parameters, usually 50. The gate of a wedge gate valve can be made into a whole, called a rigid gate; It can also be made into a gate that can produce slight deformation to improve its processability and compensate for the deviation of the sealing surface angle during the processing. This type of gate is called an elastic gate.
Wedge gate valves commonly used in the market are generally designed and manufactured according to the GB/T12234-2019 standard, with reliable sealing and excellent performance; Usually, a wedge type elastic gate structure is used, and rolling bearings are set up for medium and large diameters, making it easy to open and close; The wedge gate valve has a simple shape, short structural length, good manufacturing process, and a wide range of applications. Received welcome from a large number of users.
Working principle:
The opening and closing component of the wedge gate valve is the gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The wedge gate valve can only be fully opened and fully closed, and is not suitable for adjustment and throttling. Wedge gate valves generally complete the opening and closing of the valve by moving the valve stem up and down with the rotating handwheel. There are two types of wedge gate valves: open stem and non rising stem. Rising stem wedge gate valves move the valve stem up and down, and the valve stem nut is fixed. The non rising stem gate valve is a fixed valve stem, and the valve stem nut has been moved up and down to complete the opening and closing.
Application scope:
Wedge gate valves can withstand high pressure because their sealing surface is at an angle to the vertical centerline, resulting in good sealing. In general, the valve stem of a wedge gate valve has been tempered and surface nitrided to provide good corrosion resistance and scratch resistance; The sealing of the gate and valve seat is made of hard alloy overlay welding, which is wear-resistant, high-temperature resistant, corrosion-resistant, with good scratch resistance and long service life; The valve body material variety is complete, and the packing and gasket are reasonably selected according to actual working conditions or user requirements, which can be suitable for various pressure, temperature, and medium working conditions; Generally, it can withstand pressure up to PN16 and is widely used in industrial fields such as power, petroleum, chemical, metallurgy, mining, sewage treatment, etc. It plays a huge role in equipment such as ash removal and coal washing plants in power plants!