How to choose copper valve
2021/06/24
Selection of copper valve:
1. According to the selection of control functions, various valves have their own functions, and attention should be paid to their corresponding functions when selecting.
2. According to the selection of working conditions, the technical parameters of commonly used valves include working scale pressure, maximum allowable working pressure, working temperature (minimum and maximum temperature) and medium (corrosiveness, flammability). When selecting, pay attention to the above-mentioned parameters of working conditions and The technical parameters of the valve are consistent.
3. Choose according to the installation structure. The installation structure of the piping system includes pipe thread, flange, ferrule, welding, hose and so on. Therefore, the installation structure of the valve must be consistent with the installation structure of the pipeline, and the specifications and dimensions must be consistent.
2021-06-24
The development direction of special metal bellows materials for copper valves
The material of the copper valve suitable for the production of bellows must have good plasticity, high elastic limit, tensile strength and fatigue strength, good welding performance, and stable elastic performance. Because of these performance characteristics, austenitic stainless steel is widely used in the manufacture of bellows.
2021-06-24
What is a parallel double gate valve? Main material of double gate valve
What is a parallel double gate valve? Parallel double gate valve is also called rising stem gate valve. When opened, the valve stem is exposed to the outside of the valve body and moves up and down. The stem nut is located on the valve cover or bracket, even if the nut rotates, the stem will not rotate, and the opening/closing part will move up and down to open and close the valve.
2021-06-24
Introduction and subsequent use treatment of double gate valve
The lower end of the valve stem of the double gate valve is integrated with the wedge-shaped cone through the screw and pin shaft. The trapezoidal thread on the top is matched with the stem nut. The rotation of the stem nut is carried out by a manual wheel, wheel, bevel gear, electric or pneumatic device. The valve disc is composed of the upper and lower parts of the finite ring and the wedge regulating valve, respectively, it cannot be raised or lowered by the cone, it can only be translated or rotated by the wedge cone in a horizontally long space.
