Inspection and maintenance of air-conditioning thermostat

If the air conditioner does not run as usual, you have to do some tests. Moreover, you should check the electrical control system controls the protection and enforcement components, temperature control main selector switch. Here are a few common methods to check the thermostat.


First, the thermostat of the hot and cold dual

Using the same hot and cold temperature sensing bellows of control. Its failure to check the thermostat and general inspection method is basically the same, but it should be noted that you should also check hot and cold switching operation is sensitive, that is, turn on the compressor cooling circuit should be in the position, the heating should be in the ON position electric heater circuit. Electric air conditioner used in the thermostat, contact the control box has two sets of contacts mechanism (cold contact and thermal contact).

Second, the bellows or diaphragm thermostat

Symptom: temperature controller contacts since the ignition occurs after adhesion. Contacts are not automatically jump, the compressor can not stop.
How to repair: If disconnected. Show contact adhesion, available flat screwdriver to move the mechanical forced contact is open; if contacts can jump, Table H-month thermostat temperature range and low drift, adjustable temperature range adjustment screw clockwise.

The bulb on the refrigerator double door refrigerator (5 ~ lO ℃) within the measured temperature controller two-wire terminals are disconnected. 1. Symptom: Contact bad or burned, causing the circuit can not be turned on; frequent contact arcing motion adhesions, resulting circuit can not be broken; temperature refrigerant leak temperature chamber, causing the contacts can not lose control of its operation and the like.

How to repair: if not pass, may be temperature refrigerant leakage. Leaks can first visual inspection, the observed temperature sensor seal welding head is broken, whether the bulb is damaged and cracks, the temperature sensing tube bending Have marks, etc., and then release the bulb 30 ~ 40 ~ C's warm water, test contact is closed, if the contact is still closed. Temperature sensing agent showed temperature within the package has been completed leakage; if the contacts can be closed, then the bulb was removed from the water and place some time after contact and off at low temperatures, indicating thermostat range improper adjustment screw can be corrected by adjusting the temperature range, counter-clockwise l.

Two terminals being the thermostat knob, turn the opposite direction after a few times, with a multimeter R × l range measuring temperature controller on state, if the resistance value is very small, indicating that the contact normal; If the resistance is large, show contact poor contact.

fan coil unit thermostat

Third, the temperature-sensitive resistor

Temperature sensing control characteristic curve or characteristic table of values ​​to determine whether normal when thermistor aging, drift performance, namely when the corresponding relationship between temperature and resistance to change, should be replaced with a new thermistor sensor. Electronic thermostat or microcomputer-controlled air conditioner, are thermistor for temperature sensing element. Is a thermistor whose resistance changes with temperature significantly change elements. For an air conditioner return air temperature measured ten stand thermistor. Generally having a negative temperature coefficient characteristics: resistance value decreases with increasing temperature. Thermistor specific to a certain brand of deep space is used, its resistance changes with temperature characteristics are generally plotted in random specification chart for detection use can be detected under certain circumstances. Measured with a semiconductor thermometer and multimeter.

Fourth, the defrost temperature controller

The method is to detect the temperature sensing portion disposed corresponding to the temperature of the water or air. Measured with a multimeter two terminals is disconnected or turned on. You will know good or bad. Thermal bimetal thermostat is also used for anti-cold indoor side control. Defrost temperature controller is provided in the thermal-type air conditioner control circuit is designed for the switching element electromagnetic valve. Its temperature sensing tube in the outdoor heat exchanger coil on. When winter heating, the outdoor heat exchanger frost thickened the temperature falls below a set value. Defrost controller contact action. Disconnect the solenoid valve. So that the original heating cycle becomes refrigeration cycle. There are two common forms of structure: one is sensitive bimetal: one is ordinary thermostat.

Fan coil noise reduction measures

Fan coil air conditioning noise reduction measures are designers, hotel managers and accommodation problems are very concerned about guests. Therefore, we must from the design stage to strive to reduce noise.

Room air conditioning system caused by noise pollution has three aspects: the fresh air system, exhaust system and fan coil system. The first two can be reduced through the installation of mufflers and noise damping measures, except direct result of fan coil fitted in all parts of the room must be in accordance with the different forms and installation location, take some special measures in order to reduce its muffler noise.

4-way cassette fan coil unit(K-style)

Noise reduction measures are:
(1) selection of a low-noise fan coil, the first prototype of the selected noise measured response, and the difference is expected to be the prototype and mass production, usually 5DB (A).

(2) allowed by room noise standards, a reasonable choice of fan coil configurations:

1) requirements for in-room noise is not greater than 30DB (A) and a 20 Nc noise evaluation curve: If conditions permit, fan coil can be disposed in the conduit between and within the room fan outlet to outlet piping as pretty sonication.

2) the requirements for in-room noise is not greater than 35dB (A) and a 25 Nc time: an upper horizontal fan coil should be installed on the ceiling of the hall of the rooms can be set up in front of the outlet plus flail. 700 long pipe muffler to reduce sound night about 6dB (A) * about the school legislation fan coil should be installed away from the bed and desk area, and in the upper part (the outlet) plus set up a "Room" type muffler.

3) requirements for in-room noise is not greater than 40dB and a NC 30: Waste selection medium noise level of horizontal, vertical or school-type fan coil cabinet open at night during sleep low block to reduce noise levels. Water fan coil system and operation method of adjusting water fan coil system design, fan coil operation, should be immediately removed water pipeline system gas, to ensure that the system is not water, should be regularly cleaned return air filter set net dust. Note that the fan coil drain pan drain is not clogged debris, pay attention to the smooth discharge of condensate water.

Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in heating and air conditioning parts.Brightbest own the wide products include fan coil unit,valve( ball valve, brass ball valve,check valve,angle valve,air vent valve,stop valve,strainer valve),air conditioning stainess steel corrugated tube ,air conditioning thermostat and air curtains.

Brightbest is provided with quality certification according to ISO9001:2000 , SO14001:2004 ,CE and is strongly committed to customer satisfaction.

Our goal is to provide quality products on a timely basis. We pride ourselves on our ability to offer technical knowledge and advice to our customers as well as product of the highest quality.

Our products have been exported to UK, France, Italy, Middle East, Australia,and Africa etc. Our development vision will keep on persisting in principle of practicability, pioneer and innovation, and research & develop more efficient, energy-saving, eco-friendly and safer products to make great contribution to Chinese & worldwide energy saving and emission reduction.

Technical performance of the valve

Strength properties of the valve is the valve's ability to withstand the media pressure. Valve is a pressure of mechanical products, and therefore must have sufficient strength and rigidity to ensure the long-term use without breakage or deformation.

Sealing performance
The sealing performance of the valve is the valve part of the sealing ability to prevent media leaks, it is the valve most important technical performance indicators. Sealing valve has three parts: opening and closing pieces and valve seat sealing surface between the contact points; filler stem and the stuffing of the distribution and office; junction body and bonnet. Which is called before a leak within the leak, also known as loose relationship, it will affect the ability of the valve cut off media. For the cut valve, the internal leakage is not allowed. Leakage after the two called the leak, that media leaks from the valve to the valve outside. Leakage will result in material losses, environmental pollution, can also cause serious accidents. The explosive, radioactive medium, leakage is allowed, and therefore, the valve must have a * sealing performance.

Flowing medium
Will produce medium flow through the valve after the pressure loss (both before and after the valve pressure difference), which is the flow valve on the media have a certain resistance, medium to overcome the resistance of the valve, it takes some energy. From the conservation of energy considerations, the design and manufacture of valves, to minimize the resistance of the valve on the flow medium.

Hoisting force and hoisting moment
Hoisting force and hoisting moment is the valve to open or close the force or torque must be imposed. Close the valve, the need to open and close between the two pieces with the fat seat sealing surface of the seal formed between certain specific pressure, but also to overcome between the stem and the packing between the stem and the nut thread between the stem end bearing at and other friction parts of friction, and therefore must apply the closing force and closing moments, in the valve opening and closing process, the need to stop force and the opening and closing moments of change, and its maximum is close to the final instant or open the initial transient. Design and manufacture of valves should strive to reduce the closing force and closing moments.

brass valve

Hoisting Speed
Hoisting speed is used to open or close the valve to complete a movement time required to represent. Valves open and close the general speed is not critical, but some conditions have special requirements for opening and closing speed, the prompt to open or close, to prevent accidents, and some asked slowly shut down to prevent water hammer, etc., this should be taken into account in the selection of valve type.

Action sensitivity
This refers to the valve for the medium parameters, and make the appropriate degree of sensitivity. The throttle valve, reducing valve, regulating valve used to adjust the medium parameters valve and safety valve, trap with a specific function such as valves, the sensitivity of its function is very important technical performance indicators.

Life
It indicates the durability of the valve, the valve is an important performance indicators and has great economic significance. Usually guarantee the number of seals required to open and close that can also be used to indicate the time.

what is air curtain ?

I. What is air curtain?
Air Curtain is a powerful air current generated by the wind turbine tubular form one side of the invisible curtain. Therefore, also known as air curtain, air curtain air curtain air, dampers, air door.

II. Application of air curtain
Air curtain is installed above the door of the refrigeration, air conditioning, dust, insulation of shopping malls, theaters, hotels, restaurants, conference rooms, cold storage, operating theaters and home, etc., start the machine, indoor and outdoor air spaced able, played both accessible, but also to prevent the exchange of indoor and outdoor hot and cold air, at the same time, with dust, pollution prevention, anti-mosquito effect. Widely used in electronics, instrumentation, pharmaceutical, food, precision machining, chemical, footwear, and services, business, etc. industries.

 low noise centrifugal cross flow air curtain

III. Features and Functions air curtain

Wind-screen machines produce high-speed air flow will be divided into two separate indoor and outdoor temperature zones to create a comfortable indoor environment, maintain indoor air conditioning and air purification effect, save energy at the same time, and to make air circulation, effective separation of dust, smoke, smell gas and other microorganisms and insects. Prevent cold (warm) air outflow, continuous electricity saving air gate formation, can effectively prevent the cold (warm) air leakage, save energy, the interior is divided into two separate temperature zones, long-term operation in the air conditioner, the assisted circulation adjust the temperature, save energy environmental improvements. Dust, insects, air-screen machines produce high-speed air stream to form a protective door, can effectively block the outdoor dust and insects invade, keep the room clean. Smoke and harmful gases in the air, air-screen machine circulatory system make a strong barrier each indoor corner drift and industrial emissions, car exhaust fumes and other harmful gases into the interior spicy flavor. When the effect of air circulation in the gym, cinemas, entertainment and other large space generated by the uneven distribution of energy of air conditioning, air circulation system features air curtain reaches room temperature equilibrium.

1, thermal insulation: air curtain such as restaurants, shops and entertainment venues such as the customer places frequented no longer need to constantly switch door. Thus 60-80% efficiency to keep the interior of the cold and warm air temperature. And it will allow only a slight temperature change.

2, pest control function: You can find most annoying harmful insects can not wind curtain. So we can better and more easily maintain the fruit counter, fast food restaurants and other places of health.

3, dust-proof function: If the air curtain is installed in the precision machine shop or grocery store or face bus lane clothing hallways, can effectively shield the outside dust, 60-80% level to keep clean .

4, preservation of function: air curtain can prevent odor emitted from such chemical laboratory or store room and save frozen meat machine. And can block the harmful gases emitted outside the car. How to prevent cold air conditioning, heat outflow, the experts recommend: the wind-screen machines used in combination with organic air conditioning, air conditioning can be an effective solution to cold, heat outflow of these issues.

Principles and characteristics of fan coil system

Fan coil is one of the important types of central air-conditioning, due to the ease of installation, use of effective, less capital investment and the high popularity.

Fan coil advantage

Fan coil air conditioning system is a semi-centralized air-conditioning system in the central air conditioning system, as a terminal device system, to be located in each air-conditioned room. Central air-conditioning fan coil system with its flexible layout, easy adjustment, saving return air duct, lower operating pressures and high degree of standardization of the outstanding advantages, has been widely used in hotels, office buildings, commercial buildings, apartments, hospitals and other high-level multi-room air conditioning systems.

Fan coil system principle and characteristics - works

Fan coil units driven by the motor, by changing the input voltage regulator wind speed, so that the amount of wind turbines to meet the needs of different interior. Fans from the power control, the indoor fan coil has a great supply of hot and cold regulation. Thus, even if the power system fan air transport, but also serve to strengthen air convection and heat transfer effects.

When the refrigerant flowing in the pipe, since the temperature of the refrigerant is lower than the air temperature, surface of the pipe is easy to form condensed water in wet condition under the mediation of the coil also has the role of heat exchange and mass exchange. To make the coil sufficient to bear the entire load of air conditioning in the room, it normally takes three to four rows of tube rows.

Condensate in the bottom-mounted coil condensate drain pan, close the disc can be discharged quickly to prevent excessive condensation of water on the affected system.

Fan coil system principle and characteristics - attention problems

Fan coil units require a higher quality of the unit. Otherwise, the maintenance workload. Units require low noise, when the noise is limited, the unit sanctuary pressure head small, and thus indoor air distribution restrictions applicable to the depth less than 6M, air-conditioned room. Water disc content easy to breed bacteria, environmental pollution restrictions.

Fan coil central air conditioning system is a common type of central air-conditioning, in a small space plays an important role. Whether the effect is conditioned from an economic point of view, fan coil units are ordinary household use central air conditioning better choice.

Four-pipe fan coil

Shortcoming of four-pipe fan coil system is, ① large investment, operation and management of the pipeline due to the relatively complex ② more system design becomes more complex, larger pipeline space.

Four-pipe air conditioning means mounted air box while cold and heat pipe coils, each coil back into a total of four, so called four controls. Two water access were cold and hot water, that is, throughout the year no matter what time, cooling and heating can be switched at any time, you can achieve some of the rooms, while the heating, cooling and some rooms. So it's high standards, the cost is high. Two air-conditioning control box in just a coil, into a back pass summer cold water, hot water through the winter. Such a system makes the whole region can only heating or cooling at the same time. Compared with the four-pipe, a water system to save it, so it's relatively low standard, low cost.

 4-way cassette fan coil unit(4-pipe system)

Advantages of four-pipe system is that, ① each end device at any time freely choose the heating or cooling mode of operation, no mutual interference, air conditioning service region can independently control temperature and other parameters; ② save energy, all energy systems available by the end of the request, unlike the three control systems, as the presence of hot and cold against the problem. In a fresh air fan coil system or fan coil systems. Refrigerant and heat medium pipes in the winter and summer operation, all using the same piping system, namely winter and return hot water, the summer using the same piped chilled water ( and return), the heat source is switched in the freezing water pump and heat exchange stations, called two-pipe system. Two-pipe system can save investment costs, reduced maintenance, control the air conditioning system is a commonly used, but can not meet the needs of year-round air conditioning system.

Three controls are cold and hot water are provided two pipe system, and then return to share the same piping system.

Four-pipe is a separate hot and cold water supply pipe and a return pipe system, inlet and outlet pipe installation switching control valve, primarily for air conditioning systems used throughout the year, that at any time of cold and heat source used by the temperature control valve switch valve regulate cold, hot water. Three, four control systems due to the high investment and operating costs, usually with special needs air-conditioning systems in use.

Advantages and disadvantages of fan coil

Fan coil is an important part of the central air conditioning is generally installed in the room to hide in the ceiling, so many people are not familiar with them. In fact, fan coil plays an important role in the central air conditioning system, installed for the use of effects and effect of the product have a major impact.

First, Introduction fan coil

Fan coil is an important part of the central air-conditioning, which is mainly composed of heat exchangers, pipes, filters, fans, drain pan, exhaust valves, stents and other components.
As a terminal device central air conditioning system, fan coil works: constant air recirculation inside the room where the unit of the air through the cold (hot) coil after cooling (heating) to maintain a constant room temperature , under normal circumstances, fresh air into the room by fresh air unit after processing, to meet the needs of fresh air-conditioned room.

Second, analysis of the advantages of fan coil

1. Run the noise. In the run-time low, the noise is generally 30 ~ 40 db (A).
2. Control flexible and cost-saving. Fan speed can be divided into high, medium temperature, low grades, automatic water system pump control thermostat, etc. can be flexibly adjusted each room, in a room no one can stop.
3. Small size, layout, and easy to install. Fan coil units, terminal units belonging to types of systems, the smaller.
4. easy to install. If the building needs to be expanded, the corresponding increase in fan coil units is relatively easy to implement.

Third, the fan coil disadvantage analysis

1. The dispersion unit set, when a larger number of maintenance and management of a large workload.
2. Due to the small unit static pressure, so the unit can not use a high-performance air filters, causing air cleanliness is not high.
3. The layout of the building and conflict would require the installation and construction coordination and cooperation.

Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in heating and air conditioning parts.Brightbest own the wide products include fan coil unit,valve( ball valve, brass ball valve,check valve,angle valve,air vent valve,stop valve,strainer valve),air conditioning stainess steel corrugated tube ,air conditioning thermostat and air curtains.

Brightbest is provided with quality certification according to ISO9001:2000 , SO14001:2004 ,CE and is strongly committed to customer satisfaction.

Our products have been exported to UK, France, Italy, Middle East, Australia,and Africa etc. Our development vision will keep on persisting in principle of practicability, pioneer and innovation, and research & develop more efficient, energy-saving, eco-friendly and safer products to make great contribution to Chinese & worldwide energy saving and emission reduction.

Air forms of air curtain

The air curtain is a strong air flow generated by the wind turbine tubular form one side of the invisible curtain, therefore, also known as air curtain machine, air curtain, air curtain air, dampers, air door.

Blowing air curtain, there are three forms:  upper blower, side blower and  lower blower.

1. upper blower  air curtain

The air curtain is installed in the upper part of the doorway. Get on the air curtain installation is simple and does not occupy floor space, the building does not affect the appearance, the airflow of better sanitary conditions for the general public buildings. Despite sending air curtain blocking efficiency is not as cold outdoor air curtain feed, but it is still a form of the most promising. Usually the door air curtain whose purpose is to block the outdoor cold (hot) air, usually only set air outlet, no return air, so free jet and spread to the interior surface after exposure, this is called a simple door air curtain air curtain. For demanding building, in order to better organize the airflow, the air outlet is located at the top of the door, set back ground air, circulating air through a filter after use, heating and other processing.

2. side blower air curtain

The air curtain is installed on the side of the doorway, unilateral and bilateral divided into two kinds. Industrial buildings, when the outer door width less than 3M, should adopt unilateral air, when the outer gate width of 3 ~ 18M, should adopt unilateral or bilateral air or down on the air. In order not to block the air flow, equipped with side curtain air delivery doors open inward prohibited.

 Cross flow door ion air curtain

3.  lower blower air curtain

Centrifugal hot air curtain

The air curtain is installed under the ground. Since the bottom feed air curtain jet strongest region in the lower part of the doorway, so resist the cold winter wind invasion efficiency from the lower openings at best, but also affect the direction of the door is not open. But the bottom feed air curtain outlet at the ground, easy to be stolen goods blocked, and the air supply flow easily raised from people dress welcome. Under the current formula feed air curtain has been rarely used. Special Features Air Curtain: You can replace "alloy wheel style" (New \ available with remote control); available with "anion" (available with remote control); "explosion-proof motor" (can be customized) brand available in the market now are more more, the quality of the product are relatively mature, but better than the plastic metal housing, it does not fade! in addition, there are also hot air curtain function of the machine.

Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in heating and air conditioning parts.Brightbest own the wide products include fan coil unit,valve( ball valve, brass ball valve,check valve,angle valve,air vent valve,stop valve,strainer valve),air conditioning stainess steel corrugated tube ,air conditioning thermostat and air curtains.

Brightbest is provided with quality certification according to ISO9001:2000 , SO14001:2004 ,CE and is strongly committed to customer satisfaction.

Our products have been exported to UK, France, Italy, Middle East, Australia,and Africa etc. Our development vision will keep on persisting in principle of practicability, pioneer and innovation, and research & develop more efficient, energy-saving, eco-friendly and safer products to make great contribution to Chinese & worldwide energy saving and emission reduction.

Air Curtain maintenance and installation Precautions

Air curtain is widely used in hotels and restaurants catering and food processing pharmaceutical clean workplace, they are often used in the underground garage refrigerator door. Install air Curtain benefit is the ability to produce high-speed air flow, the interior is divided into two separate temperature zones D to create a comfortable indoor environment, maintain indoor air conditioning and air purification effect, save energy at the same time, and air circulation, isolated dust, smoke, odors and insects and other microorganisms. With the popularization and application of large amounts of wind-screen machines, many users there are many non-standard problems during use, always in the air curtain is a problem even burned remembered maintenance.

Common faults are:
1. heating and no hot air curtain
2. The air curtain noise
3. The air curtain no wind
4. electricity, air curtain does not work
5. The air curtain remote control malfunction
6. Hot air curtain running water leaks
7. Electric air curtain while the hot side of the natural wind
8. The work, the relay noise, the issue of harsh noise
9. influenced by the surrounding air curtain machine malfunctioning
10. The air curtain frequent trips after installation
11. Hot air curtain impeller off

Industrial centrifugal air curtain

Daily maintenance of content:
1. The air curtain air into and out of checks, to prevent clogging
2. Check the electrical components, check for loose screws, wiring is solid
3. Check the air curtain hanging bolt is loose,
4. Check the air curtain power cord is aging

Diagnosis is mainly for air curtain is inside the fan, the fan is a blower or exhaust devices. A blower fan is blowing air into the conduit between the pressure, room or other space. The exhaust fan is a fan sucked air in the room. First, check out the fan uneven material. Many repairman will find there is something stuck fan rack. Repair Note: The removal of these things, and check for damage. Followed by the transmission of more than a fan ratings. Repair Description: Reduce fan speed. Finally, high fan speed or rotating in the wrong direction. Repair Description: Reduce the speed of the fan or the fan correct direction.

Warm air curtain air curtain to remind you to install matters confidential note of:
1. The best installation height: Installation height is determined according to the choice of models.
2. Installation To secure the machine level, does not allow the erection and installation inclined to prohibit any debris from falling into the machine.
3. The installation of machinery and heating requirements shall be in accordance with the size of the door, select one or more, generally require the total length of the machine is slightly wider than the door number.
4. The first test machine, it was prohibited under the machine.
5. The use of the process there is abnormal sound should immediately stop inspection.

Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in heating and air conditioning parts.Brightbest own the wide products include fan coil unit,valve( ball valve, brass ball valve,check valve,angle valve,air vent valve,stop valve,strainer valve),air conditioning stainess steel corrugated tube ,air conditioning thermostat and air curtains.

Brightbest is provided with quality certification according to ISO9001:2000 , SO14001:2004 ,CE and is strongly committed to customer satisfaction.

Our products have been exported to UK, France, Italy, Middle East, Australia,and Africa etc. Our development vision will keep on persisting in principle of practicability, pioneer and innovation, and research & develop more efficient, energy-saving, eco-friendly and safer products to make great contribution to Chinese & worldwide energy saving and emission reduction.

6 major functions of air curtain

 Insulation function:
Air curtain so that restaurants, shops and entertainment venues such as the customer places frequented often do not need to switch the door. Thus 60-80% efficiency to keep the interior of the cold and warm air temperature. And it will allow only a slight temperature change.

Pest control function:
Air curtain prevents harmful insects through the air curtain. Can better and more easily maintain the fruit counter, fast food restaurants and other places of health.


Dust-proof function:
In the precision machinery factory, located near street food shops and clothing stores foyer installed air curtain can effectively shield the outside dust, 60-80% level to keep clean.

Preservation of function:
Air curtain can prevent chemical laboratory or store room and frozen meat stored mechanical exudes the smell. And can block harmful gases. How to prevent cold air conditioning, heat outflow, the experts recommend: the wind-screen machines used in combination with organic air conditioning, air conditioning can be an effective solution to cold, heat outflow of these issues.


The anion
Produce reactive oxygen species, improve lung function, promote metabolism, improve sleep, sterilization, manufacture of fresh air, smoke and dust, prevention of myopia, prevent hair split ends.

Remote control
Now many brands are plus infrared receiver function air curtain machine. However, in the application is not very popular promotion, because unlike air curtain air curtain from time to time require transformation temperature.

Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in heating and air conditioning parts.Brightbest own the wide products include fan coil unit,valve( ball valve, brass ball valve,check valve,angle valve,air vent valve,stop valve,strainer valve),air conditioning stainess steel corrugated tube ,air conditioning thermostat and air curtains.

Brightbest is provided with quality certification according to ISO9001:2000 , SO14001:2004 ,CE and is strongly committed to customer satisfaction.

Our products have been exported to UK, France, Italy, Middle East, Australia,and Africa etc. Our development vision will keep on persisting in principle of practicability, pioneer and innovation, and research & develop more efficient, energy-saving, eco-friendly and safer products to make great contribution to Chinese & worldwide energy saving and emission reduction.

Butterfly valve types

They do not supply the good manage that might be needed in throttling apps but are sometimes utilised for this purpose.

As Butterfly Valve

butterfly valve is equivalent to a ball valve except that the ball-shaped mechanism inside of is replaced by a disc or plate that rotates on a rod or trunnion. Not like the ball valve, which presents a perpendicular experience to the flow, the butterfly valve can be positioned both perpendicular to parallel to the flow. This development makes it possible for for movement management (termed throttling) that the ball valve is not ready to attain. Given that the disc is always existing in the flow, a butterfly valve triggers a strain drop, irregardless of its state.

Varieties of Butterfly Valves

wafer style butterfly valve is a frequent and fairly economical development that is made to prevent back flow in unidirectional movement techniques by retaining a seal against strain in possibly course. This is accomplished as a result of with tightly fitting seals this kind of as gaskets, o-rings, or precision machined seals. Lug-type butterfly valves are diminished stress rating valves employing threaded inserts on the two sides of the valve entire body. They are installed involving two flanges, which makes it possible for a single side of the movement program to be disconnected not having disturbing the other side.

 Triple Offset Torque Seated (TOTS) butterfly valve is one particular in which the offset style does not enable the metal seal to arrive into get hold of with the metal seat except at complete closure.

Butterfly Valve Makes use of

Butterfly valves are employed for a lot of of the identical purposes as ball valves, but given that they present a fantastic measure of handle, they can be utilized on bigger lines, this sort of as firefighting apparatus, front and rear suction ports and tank-to-pump lines.

manual operate butterfly valve

Butterfly Valve Design

Like ball valves, butterfly valves are quarter-turn devices that can be operated manually or by an actuator. While the operation executed by butterfly valve is quite related to ball valve, but it is typically a more chosen option because of to its minimal price and it is lighter in pounds. The metal disc, which is held by the rod is called the butterfly and the disc is turned when the valve closes thus totally blocking the passageway. Lists various varieties of butterfly valves There are undoubtedly diverse sorts of butterfly valves exactly where every single of the forms are meant to cater to various pressures and serve distinctive functions.

Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in heating and air conditioning parts.Brightbest own the wide products include fan coil unit,valve( ball valve, brass ball valve,check valve,angle valve,air vent valve,stop valve,strainer valve),air conditioning stainess steel corrugated tube ,air conditioning thermostat and air curtains.

Brightbest is provided with quality certification according to ISO9001:2000 , SO14001:2004 ,CE and is strongly committed to customer satisfaction.

Our products have been exported to UK, France, Italy, Middle East, Australia,and Africa etc. Our development vision will keep on persisting in principle of practicability, pioneer and innovation, and research & develop more efficient, energy-saving, eco-friendly and safer products to make great contribution to Chinese & worldwide energy saving and emission reduction.

Fan coil technology

As a semi-centralized air-conditioning system is an important and indispensable equipment, from the time it appears on the development of society constantly improve their technology in order to accommodate a wider range of applications. In order to improve the effectiveness of practical engineering fan coil has long been the main scientific and technical personnel from the fan coil structure, improve heat transfer efficiency, reduce noise, improve indoor air quality aspects and the level of automation in a bid to make an in-depth research, many new forms and structures of fan coil units are being developed to more broadly meet the needs of different occasions. For example, vertical surface mounted fan coil fan coil Column and so on.

In order to meet the needs of different occasions. Mounting type fan coil is numerous and varied, such as 1993-based film screenings and other high-Jay's need to make a new type of wall-mounted fan coil, can better solve the problem of large space use fan coil. This fan coil applied to the large space supermarket shopping malls have some inspiration. As we all know, the general construction of the supermarket, the use of a fan coil plus fresh air system, fan coil almost always placed in the room with the ceiling. Also for this reason, only the leaching system is not suitable for use "inconclusive." In addition, in order to reduce the space required for installation of fan coil units, Shandong Group in early spring and Thermal Engineering, Tsinghua University, axial flow fan used to replace the traditional flow fan, optimize the structure of the heat exchanger, developed ultra-thin fan coil and greatly reduce the height of the coil, to further improve the fan coil applications in commercial and residential buildings. The development of this new product, you can better solve the problem of the ceiling take up a lot of space, so that if the fan coil unit can solve their own "historic" problem, it will be more competitive in the system selection.

In order to ensure good indoor air quality, adsorption, photocatalytic technology has been cited to the fan coil system, in 1992, Zhu Yaokun first "multi-functional air-conditioner fan coil" in the proposed use of the sterilizer, 1994, Huang Bin incense who proposed a more comprehensive "essence fan coil air conditioner, by adding in the system, such as air filters, electrostatic precipitators, negative ion generator, ultraviolet generator or layer of activated carbon fiber layer 7 in order to ensure a thorough clean indoor air new indoor air content of the fresh air fan coil technology has also been considerable development.

 exposed type wall mounted fan coil unit

Bright Best air conditioning is a chinese private group of companies established in 2012 and specialised in heating and air conditioning parts.Brightbest own the wide products include fan coil unit,valve( ball valve, brass ball valve,check valve,angle valve,air vent valve,stop valve,strainer valve),air conditioning stainess steel corrugated tube ,air conditioning thermostat and air curtains.

Brightbest is provided with quality certification according to ISO9001:2000 , SO14001:2004 ,CE and is strongly committed to customer satisfaction.

Our products have been exported to UK, France, Italy, Middle East, Australia,and Africa etc. Our development vision will keep on persisting in principle of practicability, pioneer and innovation, and research & develop more efficient, energy-saving, eco-friendly and safer products to make great contribution to Chinese & worldwide energy saving and emission reduction.