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Butterfly valve outlet valve
In the past, the multi-valve system consisting of check valve, globe valve and water hammer eliminator was widely used in the cooling and circulating water supply equipment of industrial production to meet the specific requirements of starting and closing the pump, so as to achieve the purpose of starting and eliminating water hammer with light load.
time：2018-09-21 11:09:02
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Technical requirements of multi-function pump control valve
This standard is applicable to multifunctional pump control valves with nominal pressure of PN1.0MPa - PN4.0MPa and nominal diameter of DN50mm - DN1200mm. Standard technical requirements are introduced as follows: 1 pressure - temperature level multifunction pump control valve pressure - temperature grade from shell, inner part and control pipe system material
This standard is applicable to multifunctional pump control valves with nominal pressure of PN1.0MPa - PN4.0MPa and nominal diameter of DN50mm - DN1200mm.
time：2018-05-25 15:46:51
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Common failures and preventive measures for automatic valves
Fault one: the valve is not through. The reasons are as follows: (1) the control channel is blocked by the sundries (the passage is small and easy to be blocked); and the piston is stuck in the highest position because of rust stains; although the upper part is stressed, it can not move down and can not open the main channel. Therefore, before the piston pressure relief valve must be installed filters, for newly installed or long-term discontinued pressure relief valve, must be disassembled for inspection and cleaning.
time：2018-05-25 15:46:51
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How to install stainless steel valves
1, when the valve is lifted, the rope should not be tied to the handwheel or stem, so as not to damage the components and should be tied to the flange.
2, before installation, the valve should be checked to check the specifications and types, identify damage, especially for stem. It also needs to rotate a few times to see if it is skewed, because the most easily inclined stem is in the transportation process. And remove the sundries in the valve.
time：2018-05-25 15:46:51
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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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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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