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Causes and elimination of valve stem leakage
When the ball valve is used, the valve rod leakage often occurs. It is necessary to find the reason for the leakage of the valve stem according to the specific conditions, so as to eliminate the failure and ensure the ball valve to be used normally. If the pressure of the pipe is too high and the ball valve stem leakage is caused by the pressure range of the ball valve, the ball valve must be replaced, and the ball valve is selected to meet the pressure of the pipe to ensure the normal operation of the pipe and the related equipment.
time：2018-05-25 15:46:51
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How to solve the noise problem in different conditions of the regulating valve
1) elimination of resonance noise method
Only when the regulating valve resonates, there is a superposition of energy to produce a strong noise of more than 100 decibels. Some are characterized by strong vibration, little noise, weak vibration, and very large noise; some vibration and noise are larger. This noise produces a single tone sound of 3000~7000 hertz. Obviously, resonance, noise elimination is clearly eliminated. Nature vanishes. Methods and examples see 4 of the above 4.5, 5), 6).
time：2018-05-25 15:46:51
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Environmental protection will become the focus of attention in 2014. Valve industry will also usher in new development opportunities.
Under a series of policy incentives, the energy saving and environmental protection industry in 2014 will usher in better development opportunities. In recent years, China's investment in environmental pollution control has continued to grow, but its proportion in GDP is still low, and it is expected to continue to increase capital investment in 2014.
time：2018-05-25 15:46:51
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How to correctly adjust the electric device of the valve
In the process of production and water supply in industrial enterprises, especially in urban water works, a large number of ordinary gate valves, butterfly valves, and liquid controlled butterfly valves are used to control the production of water, which is a major equipment for the water supply enterprises. The number of valves used in various valves is large. This article will discuss how to adjust the electric valve of electric valve.
time：2018-05-25 15:46:51
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How to choose and check the principles of high quality valve blanks
Commonly used blanks for machining are castings, forgings, profiles and weldments. The different types of blanks and the accuracy, roughness and hardness of blanks have a direct impact on the machining process.
time：2018-05-25 15:46:51
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Reasons for the inability of automatic valves to be opened
1, pneumatic solenoid valve blockage, leakage or out of control, damage, remove inspection, damage to be replaced;
2, compressed air pressure is insufficient, should maintain 0.5-0.7Mpa;
3, cylinder piston "O" ring damage, remove replacement;
4, the stem is stuck to the foreign body, and dismantled and overhauled.
time：2018-05-25 15:46:51
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What is the difference between the ball valve and the butterfly valve
The biggest difference between the ball valve and the butterfly valve is that the opening and closing of the butterfly valve is a plate, and the ball valve is a ball, the valve and the valve core of the butterfly valve are all revolving around its axis; the valve plate of the gate valve is moving along the axis; the butterfly valve and gate valve can adjust the flow through opening degree; the ball valve is not easy to do. To this point.
time：2018-05-25 15:46:51
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Seven points of attention for the selection of hydraulic control valves
The specifications and models of the various hydraulic control valves can be based on the maximum pressure of the system and the actual flow through the valve (from the working condition map and the system diagram) and considering the control characteristics of the valve, the stability and the size of the oil port, the size of the shape, the way of installation and connection, the mode of manipulation, etc., from the sample or the catalogue of the product.
time：2018-05-25 15:46:51
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Installation and maintenance of hydraulic control valve
The hydraulic control valve mainly uses its own pressure in the pipeline to control the movement of the main valve disc through the pressure difference of the upper and lower chamber control chamber, and then produces various series of valves through the bypass pipe and various different structure guide valves, thus achieving the purpose of various requirements.
time：2018-05-25 15:46:51
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Structure and working principle of liquid controlled one-way valve
When the control oil outlet does not pass the pressure oil, the oil can only go from PA to PB. When the oil pressure is passed through the oil outlet, the positive and reverse oil can be freely passed. One-way valve cover: right angle check valve, one-way valve function, controllable one-way valve, low pressure one-way valve.
time：2018-05-25 15:46:50
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