pneumatic flow control valve came out in the 1950s, with the rapid development of science and technology, production technology and product structure of continuous improvement, in a short period of 40 years, has rapidly developed into a major valve class. In industrialized countries, the use of ball valves is increasing year by year.
In China, the ball valve is widely used in petroleum refining, long-distance pipeline, chemical, paper, pharmaceutical, water, electricity, municipal, steel and other industries, occupies a pivotal position in the national economy. It has a 90 degree rotation action, the swivel body is a sphere, with a circular through hole or passage through its axis.
The high temperature solenoid valve is mainly used in the pipeline to cut, distribute and change the direction of flow of the media, it only needs to rotate 90 degrees of operation and a small turning torque can be closed tight. Ball valve is most suitable for the switch, cut off the valve to use.

Installation must be careful to avoid cracking the brittle material produced by the solenoid valve. Before installation, the solenoid valve should be a check, check the specifications model, identify whether the damage, especially for the stem. But also turn a few times to see if the skew, because the transport process, the most vulnerable to hit the stem. Also remove the debris from the valve.
   When the stainless steel solenoid valve is lifted, the rope should not be on the hand wheel or stem, so as not to damage these parts, should be on the flange. For the solenoid valve connected to the pipeline, be sure to clean. You can use compressed air to blow iron oxide chips, mud, welding slag and other debris. These debris, not only easy to scratch the sealing surface of the solenoid valve, which install the screw solenoid valve, it should be sealed packing, wrapped in the pipe thread, do not get the solenoid valve, so as not to accumulate the valve, affecting the media circulation.
    When installing the flange two way solenoid valve, pay attention to the symmetrical even tightening bolts. Solenoid valve flange and pipe flange must be parallel, the gap is reasonable, so as to avoid excessive pressure on the solenoid valve, or even cracking. For the brittle material and the strength of the solenoid valve is not high, with particular attention. To be welded with the tube solenoid valve, should first spot welding, and then the closure of the full open, and then welded to death.

Ball valves are: floating ball valve, fixed ball valve, ball valve, V ball valve, three ball valve, stainless steel ball valve, cast steel ball valve, forged steel ball valve, ash ball valve, anti-sulfur ball valve, pneumatic ball valve, electric ball valve Ball valve, solder ball valve.
Floating ball valve
Ball of the ball is floating, under the action of the medium pressure, the ball can produce a certain displacement and pressed on the outlet side of the sealing surface to ensure that the export side of the seal. Floating ball valve structure is simple, good sealing, but the ball to bear the working medium of the load all passed to the export seal, so consider the sealing material can withstand the work of the ball media load. This structure is widely used in medium and low pressure ball valves.
2. Fixed ball valve
Ball of the ball is fixed, after the pressure does not produce movement. Fixed ball valve with a floating seat, by the media pressure, the high temperature solenoid valve suppliers seat movement, so that the seal on the ball to ensure that the seal. Usually with the ball on the lower shaft with bearings, operating torque is small, suitable for high pressure and large diameter valves. In order to reduce the operating torque of the ball valve and increase the reliability of the seal, in recent years there have been oil seal ball valve, both in the sealing surface between the injection of special lubricants to form a layer of oil film, which enhances the seal, but also reduces the operating torque , More suitable for high pressure large diameter ball valve.
3. Elastic ball valve
The ball of the ball is elastic. Spherical and direct acting solenoid valves price seat seals are made of metal materials, sealing a lot of pressure, relying on the pressure of the media itself has been less than the requirements of the seal, you must exert external force. This valve is suitable for high temperature and high pressure medium. The elastic sphere is an elastic groove at the lower end of the inner wall of the sphere, and is elastic. When closing the channel, use the wedge of the stem to keep the ball open and seal against the seat. Before turning the ball, loosen the wedge head, and the sphere restores the original shape, so that there is a small gap between the ball and the seat, which can reduce the friction and operating torque of the sealing surface.

The role of the trap is to automatically discharge the steam Pilot Air Control Valves and equipment generated in the condensate and non-condensable gas, and can effectively prevent the steam emissions, to ensure the normal operation of steam equipment. In the chemical design, often encountered steam traps (also known as traps), but because the trap system is only a small attachment, and often not the designer attention. According to reports, China's annual about 300 million sets of traps in use, but up to 70% to 75% of the poor use, which in addition to the middle of the trap itself because of the reasons, the main reason is in the system design and selection There is a problem.

The trap can not discharge condensate, the trap for a long time without response, the 4A Air Control Valve surface temperature drop, which is the trap can not open the state.
The reason for this failure:
1, the filter or pipe is impurity, stolen goods blocked, condensate can not flow into the steam trap. The filter, tubing and valve dirt must be cleaned.
2, the amount of condensate discharged from the trap is very small or the action interval length, then it is necessary to replace the small capacity of the trap.
3, do not drain condensate water trap is hot, steam or secondary steam produced by the phenomenon of steam plug Once the steam is condensed, the steam seal that disappeared. This is due to the installation of steam traps caused by unreasonable, the middle of the entrance pipe can not have place to stay condensate.
4, water attack float damage water can not be floating, should replace the new float.
5, the pressure is too large. The pressure of the steam equipment exceeds the maximum working pressure of the trap so that the trap can not be opened. Replace the working pressure of the trap or adjust the working pressure to reduce the steam equipment.
6, water heater coil vacuum, hinder emissions. Install a vacuum damper between the heat exchanger and the pneumatic solenoid water valve.
How to determine the trap is different from the different methods of judging the trap, the simple method requires very professional experience, of course, there are many professional methods of traps, which require some equipment. Since you say that the condensate is serious, that is, the trap does not drain, or the displacement is lower than the amount of condensate produced, which can be seen in the field is very simple. However, there are many reasons for the serious cause of water hammer, may be improper selection, the installation is wrong, there is no filter before the filter or filter failure, resulting in trap clogging.

China's refrigeration accessories electric valve market prospects can be expected

Industry stakeholders said that the valve in the industrial process, mostly used to control the flow of various fluids and flow, such as water, oil, chemical liquids, based on the parameters of temperature, pressure and flow. The factory commonly used 5v Series Solenoid Valve with pressure relief valve, pneumatic temperature control valve, solenoid valve temperature system, proportional control valve temperature control system, temperature control valve and other types. In the selection of various types of automatic valve, should consider the type of heat engine, the required accuracy, control valve quality, pressure drop, flow and its structure, failure rate, manufacturers credit and after-sales service and other factors, in order to achieve economic and practical purposes.
In terms of the product itself, the electric valve is easy to install, the failure rate is low, and meet the advantages of industry automation needs, the industry is more cost-effective choice. Because the use of the traditional traditional pneumatic valve, will inevitably have piping, solenoid valves and compressors to become, and the 5 way 3 position valve is driven by a motor, easy installation, and the installation of electric valve with the original control of the original line can save other Cost of expenditure. In addition, the motor-driven way to open and close more smoothly, no instantaneous impact is too large shortcomings, the failure rate can be greatly reduced. With the continuous development of market science and technology, but also to the high-tech, high parameters, strong corrosion resistance, high life direction.
At present, China's valve industry and foreign valve industry gap is more obvious, there are four major differences: First, the gap between the technological innovation capacity; Second, the processing technology on the gap; Third, the quality management and equipment gap; Fourth, Management gap. This also allows us to see their own shortcomings, in order to find gaps and problems in essence, so as to improve and improve.