The maintenance of the butterfly valve can not be ignored

The butterfly valve is one of the more common types of valves in industrial pipelines. The butterfly valve itself has a relatively small structure. It is only necessary to put the butterfly valve in the middle of the flanges at both ends of the pipe, and use the stud bolt to pass through the pipe flange and the wafer type butterfly valve lock. Tightly, the fluid medium in the pipeline can be controlled. It is especially suitable for places with narrow space or short distance between pipes. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the resistance when the medium flows through the valve body. Therefore, the pressure drop generated by the valve is small, so it has a relatively small Good flow control features.

The butterfly valve is driven by the motor of the electric actuator to drive the valve shaft of the butterfly valve. The valve shaft drives the butterfly plate to rotate 90° to realize the opening and closing of the valve, which can be used for cutting and adjusting the flow. The electric actuator has an end limit switch, which can automatically cut off the circuit to the end point. At the same time, in order to ensure the safety of the project, the electric overload protection device and the signal indicator are provided.

working principle:

The pair of butterfly valves have two left and right air chambers, and the air source signal pressures outputted by the double acting positioners are respectively input into the left and right air chambers of the actuator piston. Due to the different pressures of the air supply to the air chambers on both sides, a pressure difference is formed between the two air chambers, thereby pushing the piston to move linearly. Through the gear and rack drive, the linear motion of the piston is converted into the rotary motion of the spindle of the actuator. When the pressure of the left and right air chambers is balanced, the motion stops. If it is necessary to adjust the flow rate, it is necessary to rotate the valve stem and the valve core while the actuator rotates to change the flow area between the valve core and the valve seat to achieve the adjustment purpose.

As is known to all, the butterfly valve is designed and manufactured by the new structure of the middle-line butterfly plate and the short-structure steel plate. The structure is compact, light in weight, easy to install, small in flow resistance, large in circulation, avoiding the influence of high temperature expansion, and light in operation. At the same time, the butterfly valve is a non-closed butterfly valve, which is widely used in the production process, metallurgy, mining, electric power and other production processes. The medium temperature is ≤300°C and the nominal pressure is 0.1Mpa. It is used to connect, open and close or adjust the medium volume. . After daily use, we can't take care of the maintenance of the butterfly valve. Today, Xiaobian will tell you about it!

(1) Always check the voltage of the power supply. The power supply voltage fluctuation range is within ±10% of the rated voltage. Pay special attention to the supply voltage. The supply voltage deviation range is within ±10% of the rated voltage to ensure that the butterfly valve can operate normally. Check the filter of each device frequently. When the oil contamination alarm is found, replace the filter element in time. If the filter element is found to be severely damaged, the tank fluid must be replaced or filtered.

(2) After the device is put into operation, it is necessary to frequently observe the operation of the device locally. If abnormal phenomena such as fault indication and oil leakage occur, timely treatment is required, and the working pressure and work are properly adjusted according to design regulations and work requirements. speed. When the pressure valve and speed control valve are adjusted to the required values, the adjusting screw should be tightened to prevent loosening.

(3) Pay attention to moisture, anti-loose, anti-corrosion, dustproof and anti-collision. The working temperature of the oil should not exceed 55 °C. If the working temperature of the oil on the butterfly valve exceeds 55 °C, the cause must be found to be solved.

EDM graphite, also known as graphite block for EDM, is a new type of material, which is now more and more widely used in the precision mold processing industry. At present, in mold processing plants in developed European countries, more than 90% of mold processing electrode materials are graphite. Copper, the once dominant electrode material, has almost lost its advantages compared with graphite electrodes.

Our isostatic graphite and Molded Graphite were tested at the National Electrical Carbon Products Quality Supervision and Inspection Center. The main physical and chemical performance index as follows: the compressive strength--125 mpa, shore hardness -- 65 degrees, resistivity --12 mu Ω m. At the same time, the 10μm,8μm,6μm,4μm products have already began Large-scale production,.and unanimously acknowledged by customers. The 2μm,1μm graphite products are under trial. Our company high quality of isostatic pressing special graphite yield above 90%, far ahead of industry the yield of 70%, the first in the country.

Company main products:

1.Isostatic Graphite Block

2.Molded graphite block

3.Graphite rod

4.Graphite tube

5.Graphite plate

6.Graphite Parts

7.Graphite crucible

Customized High Pure and density graphite products/graphite block for EDM