How to choose the right electric valve? Analysis of function characteristics of explosion-proof electric valve
Electric valve in the pipeline is mainly used to do blocking, distribution and change the direction of activity of the medium, it only needs to rotate 90 degrees of control and a small rolling moment can be closed tightly, choose accurate electrical installation to prevent the torque is too small, can not switch electric valve, choose electrical installation should pay attention to: The operating torque is the main parameter for selecting the electric valve device. The output torque of the electric device should be 1.2 ~ 1.5 times of the maximum torque of the valve operating tripod.
There are two main structure of the thrust electric valve device: one is not configured with thrust disc, direct output torque; The other is the configuration of a thrust disc, the output torque through the thrust disc stem nut into the output thrust.
The number of rolling rings of the output shaft of the electric valve device is related to the nominal diameter of the valve stem pitch and the number of threads. It is calculated according to M=H/ZS (M is the total number of rolling rings that the electric device should be satisfied with, H is the opening height of the valve stem, S is the pitch of the valve stem drive thread and Z is the number of valve stem thread).
Stem diameter for multi-turn type open stem valve, if the electric device agreed to pass the largest stem diameter can not pass through the valve stem of the valve, it can not be assembled into an electric valve.
Therefore, the inner diameter of the hollow output shaft of the electric device must be greater than the outer diameter of the valve stem of the open rod valve. For the dark rod valves in the department rotary valves and multi-rotary valves, although the valve stem diameter does not need to be considered, the valve stem diameter and the key way size should also be fully considered in the selection, so that the assembly can work normally.
If the opening and closing speed of the output speed valve is too fast, it is easy to produce water percussion phenomenon. Therefore, the appropriate opening and closing speed should be selected according to different use conditions.
Analysis of function characteristics of explosion-proof electric valve
Analysis of function characteristics of explosion-proof electric valve
Explosion-proof electric valve is mainly divided into: explosion-proof electric ball valve; Explosion-proof electric butterfly valve; Explosion-proof electric ventilation butterfly valve; Explosion-proof electric fluorine lined ball valve; Explosion-proof electric fluorine lined butterfly valve; Explosion-proof electric V-type ball valve; Explosion-proof electric soft seal butterfly valve; Explosion-proof electric clamp butterfly valve; Explosion-proof adjustment electric butterfly valve; Explosion-proof electric ball valve and so on in the current life has been in a very popular position, and the use of the above let us can be very effective to understand and familiar with it, it has a lot of functions, so that we can be very effective use will not make mistakes, its use environment we need to pay attention to should not be placed in a high temperature environment, And according to the actual relevant space factors for effective use, we are very necessary to determine and understand its own characteristics, can not be placed in direct sunlight, so that the machine case damage phenomenon, or the internal line occurred above the problem resulting in the overall use of the above.
Explosion-proof electric actuator and ball valve ball, the actuator adopts integrated design, input 220V power supply can be directly for switching quantity adjustment, also built-in servo module, input control signal (4 ~ 20mADC or 1 ~ 5VDC) and single-phase power can control operation. Electric explosion-proof ball valve explosion-proof grade for d¢òBT4, protection grade for IP67, with field control device. Electric explosion-proof ball valve is characterized by: no power, the clutch handle can be manually operated. When energized, the clutch automatically resets. The flow direction can be arbitrary, adjustable range, can be used for high pressure and large diameter occasions, control high viscosity, with fiber and fine particle media.
Electric explosion-proof butterfly valve is composed of three eccentric butterfly valve and electric actuator. Electric explosion-proof butterfly valve structure form: three eccentric structure and single eccentric structure, seal form: metal seal and soft seal structure. Electric explosion-proof butterfly valve is divided into two types: flange type and clamp type. In the temperature below 150 degrees can be selected PTFE seal butterfly valve, high temperature conditions can be selected three eccentric hard seal valve body. Explosion-proof electric regulating butterfly valve can be widely used in food, environmental protection, light industry, petroleum, chemical industry, teaching equipment, paper making, electric power and other industries of industrial process automatic control system. Electric explosion-proof butterfly valve in food, medicine, chemical, petroleum, electric power, textile, paper and other water supply and drainage, gas pipeline for regulating the flow and intercepting medium.
Do you know how to accurately operate the explosion-proof electric valve so that the life and function of the equipment can be put to good use? In case you don’t know, here’s a sneak peek.
1. If you are using explosion-proof electric valves, you must first confirm repeatedly that all the premises are in line with each other before you can run. Many customers are affected by careless inspection, which affects the service life and function of the equipment.
2, after the operation of explosion-proof electric valve, do not too hard to control the equipment, but slowly to control if the external force is too large, it is not able to increase the function of the equipment will make the parts of the equipment due to excessive external force and distortion, thus affecting the equipment.
Function characteristics of explosion-proof electric valve:
1, improve the predecessor of no pin connection technology, so that the sealing function is more reliable, long service life, easy maintenance
2, the use of electroplating, nylon and other different coatings, corrosion resistance is improved, can meet the needs of different mining.
3, the valve appearance using spray coating, so that the product appearance anticorrosion function progress, beautiful appearance.
4, electric drive device function, its characteristics are as follows:
1) Small and light, easy to disassemble and repair, and can be installed at any Angle
2) Aluminum alloy die-cast shell can reduce electromagnetic interference
3) Integrated design of worm gear output shaft to avoid the gap of key connection and high transmission accuracy
4) The output shaft of the worm gear cast with copper alloy has high strength and good wear resistance
5) Microswitch with full entrance, more agile on and off, more safe to use
6) A variety of output signals: switch type, regulator type, intelligent type
7) With overheating protection, overload protection function, safety is guaranteed
Post time: Jan-05-2023
