1, the instrument must have a good grounding.
2. Turn on the power and connect the console output terminal and the generator input terminal. The meter and the instrument are connected and the air switch is turned on. At this time, the riser waits for the rise.
3. Rotate the regulator clockwise and evenly, paying attention to the output current indication on the console until the required large current.
4. In the course of the riser test, once abnormal phenomena are found, the air switching power supply shall be cut off immediately and the cause must be ascertained before testing.
5. After the test is completed, the regulator must be returned to zero. The air switch should be used to cut off the power supply, cut off the power supply, and remove the test wiring in the direction to ensure safety.
Stainless steel ball valve, its closing part is a sphere, and the sphere rotates around the center line of the valve body to open and close a valve.
Stainless steel ball Valves are mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It is a new type of valve that is widely used.
The stainless steel ball valve can be closed tightly with only a 90-degree rotation and a small torque. The completely equal valve body cavity provides a low resistance, straight-through flow path for the medium. The main feature of the ball valve is its compact structure, easy operation and maintenance, stainless steel ball valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. The ball valve body can be integral or combined. This type of valve should generally be installed horizontally in the pipeline.
Stainless steel ball valve classification: stainless steel pneumatic ball valve, stainless steel electric ball valve, stainless steel manual ball valve.
Stainless steel ball valve material: 202, 304, 316, 321
The working principle of stainless steel ball valve is to make the valve unblocked or blocked by rotating the valve core. It is easy to switch, small in size, can be made into a large diameter, reliable sealing, simple structure, convenient maintenance, sealing surface and spherical surface are often in a closed state, not easy to be eroded by medium, wide application range, diameter from small to several millimeters, As large as several meters, it can be applied from high vacuum to high pressure.
Stainless steel ball valves have been widely used in petroleum, chemical, power generation, papermaking, atomic energy, aviation, rockets and other sectors, as well as people's daily life.
Stainless steel ball valves are divided into one-piece, two-piece and three-piece according to their composition.
Features of stainless steel ball valve
1. The fluid resistance is small, and its resistance coefficient is equal to the pipe section of the same length.
2. Simple structure, small size and light weight.
3. Tight and reliable, the sealing surface material of the ball valve is widely used in plastic, which has good sealing performance, and has also been widely used in vacuum systems.
4. Easy to operate, open and close quickly, just rotate 90° from fully open to fully closed, which is convenient for long-distance control.
5. The maintenance is convenient, the structure of the ball valve is simple, the sealing ring is generally movable, and the disassembly and replacement are more convenient.
6. When fully open or fully closed, the sealing surfaces of the ball and the valve seat are isolated from the medium, and the sealing surface of the valve will not be eroded when the medium passes through.
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