2026-Wujing Valve Co., Ltd.

Wujing Valve Co., Ltd. is a general-purpose valve manufacturing enterprise that integrates design, production, sales and casting. The main products include: check valves, carbon steel ball valves, cast steel gate valves, Y-type filters, flange ball valves, stainless steel gate valves, stainless steel globe valves, stainless steel vertical check valves, Q47F ball valves, hard-sealed ball valves, large-diameter ball valves, etc. The products are widely used in fields such as petroleum, chemical industry, natural gas, aerospace, papermaking, metallurgy, dyeing, painting, environmental protection, pharmaceuticals, bioengineering, food and beverage, water treatment or urban construction. The company adheres to the development tenet of "Life lies in movement, enterprises innovate", the quality policy of "Pursuing quality, without end", and the business philosophy of "Advancement in technology, winning by quality, and providing excellent service", and upholds the enterprise spirit of "开拓，进取，创新，求实，拼搏" and the flexible and diverse business system. It closely follows market demands， improves product quality， and sincerely provides users with high-quality products and services to ensure user satisfaction. A check valve refers to a type of valve where the closing element is a circular disc and it operates by itself due to the weight of the medium and the pressure of the medium to prevent the reverse flow of the medium. It belongs to an automatic valve and is also known as an anti-reflux valve， single-way valve， return valve or isolation valve. The movement mode of the disc is divided into vertical type and swing type. The vertical check valve is similar in structure to the globe valve， except that it lacks the valve stem that drives the disc. The medium flows from the inlet end (lower side) and out from the outlet end (upper side). When the inlet pressure is greater than the weight of the disc and the flow resistance， the valve is opened. Conversely， when the medium flows in the opposite direction， the valve closes. The swing check valve has a slanted disc that can rotate around the axis and works in a similar way to the vertical check valve. Check valves are commonly used as bottom valves in pumping devices to prevent water from flowing back. Check valves are combined with globe valves to achieve a safety isolation effect. The disadvantage is high resistance and poor sealing when closing. A ball valve is evolved from the plug valve. Its closing element is a spherical body that rotates 90 degrees around the valve body's center line to achieve opening and closing. Ball valves are mainly used in pipelines to perform cutting， distribution， and changing the direction of the medium flow. Ball valves are a new type of valve that has been widely adopted in recent years. They have the following advantages： 1. The resistance of the fluid is small， and its resistance coefficient is equal to that of the same length of pipe section. 2. Simple structure, small size, and light weight. 3. Compact and reliable. Currently, the sealing surfaces of ball valves are widely made of plastics, and they have good sealing performance. They have also been widely used in vacuum systems. 4. Easy to operate, quick to open and close. From fully open to fully closed, it only requires a 90° rotation. It is convenient for remote control. 5. Easy to maintain. The structure of ball valves is simple, and the sealing rings are usually movable. Disassembly and replacement are relatively convenient. 6. When fully open or fully closed, the sealing surfaces of the ball and the valve seat are isolated from the medium. When the medium passes through, it will not cause erosion of the valve sealing surfaces. 7. Wide application range. The diameter can range from a few millimeters to several meters, from high vacuum to high pressure. Ball valves have been widely used in various departments such as petroleum, chemical industry, power generation, papermaking, atomic energy, aerospace, rockets, etc., as well as in people's daily lives. Gate valves are a type of opening and closing component with a gate plate. The movement direction of the gate plate is perpendicular to the flow direction. Gate valves can only be fully opened or fully closed and cannot be used for regulation and throttling. They seal through the contact between the valve seat and the gate plate. Usually, the sealing surfaces are welded with metal materials to increase wear resistance, such as 1Cr13, STL6, stainless steel, etc. The gate plate has rigid gate plates and elastic gate plates. Depending on the different gate plates, gate valves are classified as rigid gate valves and elastic gate valves. The opening and closing component of the gate valve is the gate plate. The movement direction of the gate plate is perpendicular to the flow direction. Gate valves can only be fully opened or fully closed and cannot be used for regulation and throttling. The gate plate has two sealing surfaces. The most commonly used type of gate valve has the two sealing surfaces forming a wedge shape, and the wedge angle varies with the valve parameters, usually 5°, and 2°52' when the medium temperature is not high. The wedge-shaped gate valve can be made as a whole, called a rigid gate plate; or it can be made as an elastic gate plate to improve its processability and compensate for the deviation of the sealing angle during processing. This type of gate plate is called an elastic gate plate. When the gate valve is closed, the sealing surfaces can rely solely on the medium pressure to seal, that is, the sealing surfaces of the gate plate are pressed against the other side of the valve seat by the medium pressure to ensure the sealing of the sealing surfaces. This is self-sealing. Most gate valves adopt forced sealing, that is, when the valve is closed, an external force is used to forcibly press the gate plate against the valve seat to ensure the sealing of the sealing surfaces.