How many valves are there for heating? What is the full open state?

There are many types of valves for heating, but they can be simplified into two categories:

1. The first category, lifting opening and closing valves; Such as: various types of gate valves, globe valves, etc., the opening and closing parts of this kind of valve are driven by the door stem rotation to drive the valve disc to lift and switch the valve, clockwise rotation of the handwheel is closed, the door rod of the open rod valve falls to the lowest point, the handwheel rotates very laboriously when the valve is closed. On the contrary, turning the handwheel counterclockwise is closed, the door lever of the open rod valve is raised to the highest, and the handwheel is fully open when it rotates laboriously.

Some of the large-diameter valves have an indication of the switching status;

2. The second category, rotary opening valves; Such as: butterfly valve, ball valve, etc., this kind of valve rotates 90 degrees to open and close the valve, and the handle of the small valve is generally closed when it is perpendicular to the pipeline, and the handle is fully open when it is parallel to the pipeline. Some of the large-diameter valves have an indication of the switching status;

3. There are also check valves, pressure reducing valves, safety valves, etc., and the switch state is not discussed here.

Valves for heating.

Generally, there will be a threaded ball valve, or a gate valve.

If the ball valve has a handle, the vertical pipe of the handle (the section where the ball valve is installed) is closed, and the horizontal parallel to the pipe is open.

The gate valve is closed clockwise and open counterclockwise.

The temperature control valve is on the scale, and it is closed when the pointer points to the snowflake (*), and there are generally about 5 openings, which are used to adjust the amount of hot water, and the scale corresponds to the temperature, you can read the manual.

Common ball valves, gate valves, globe valves. The ball valve handle follows the direction of the valve body. The gate valve globe valve is open counterclockwise to the valve handwheel, and vice versa. Turn it on until it can't be twisted, and you can twist it back half a turn.

The method of judging whether the heating valve is open is as follows:

Generally speaking, the heating valve will be marked with the word switch, just twist the handle of the valve in the direction marked open. However, in the process of opening, it is necessary to pay attention to the fact that if the handle is stuck due to rust, do not force it to be twisted open, otherwise it is easy to break.

A little common sense about using heating

1. In the process of using heating, it is necessary to pay attention to the timely payment of heating fees. Generally speaking, most heating areas start heating from October every year, if you do not pay in time, then not only face the risk of being shut down, but also pay a certain late fee.

2. Usually before heating, a trial heating will be carried out for a period of time in advance, and the heating will be officially carried out when the temperature officially enters the cold stage. After formal heating, we must pay attention to the temperature changes in the room, as well as the temperature changes in the heating pipes.

3. If the heating is faulty during the heating period, then it is best to report for repair in time and let professionals come to the door for maintenance. Do not carry out repairs without permission, otherwise it is easy to repair or damage its parts.

4. During the heating period, most families are in a sealed state, which will make the indoor air not circulated, which will affect people's health. In the process of using heating, you should pay attention to ventilation, that is to say, it is best to open the doors and windows of the home every few days for ventilation to maintain the flow of indoor air.

The heater can be opened by turning the handwheel clockwise through the bypass valve, and the manual bleed valve of each radiator can be opened in turn to make the heating function.

The installation of radiators is also inseparable from radiator valves, if the air and cold water in the radiator can not be cleaned, the heat dissipation effect of the new radiator will be greatly reduced. If you install the radiator after the heating starts, you can close the radiator outlet valve and open the water inlet valve (the pipe valve with temperature by hand).

As the primary safety barrier of radiators, radiator valves play a pivotal role. If it is found that the radiator valve is faulty, it should be stopped immediately, the cause should be found out and the fault should be cleared in time.

At present, in order to adapt to the application of indoor horizontal single pipe plus pipe system, some manufacturers have introduced a special bypass temperature control valve, which takes the radiator channel (including the temperature control valve) and the bypass branch as a whole, and the bypass branch becomes an adjustable bypass valve. Resist. The advantage is that the calculation and installation are simplified, and the system can be individually adjusted according to the specific situation due to the adjustable bypass ratio.

The bypass thermostat can also calculate the inlet factor of the radiator. At present, it has been gradually adopted in some engineering projects.

First of all. The valves on the heating pipes should not be opened and closed at will. If you are running a heating system for the first time, commissioning is usually required.

Specifically, adjust the valve of each riser to the appropriate position, open the manual release valve of each radiator to discharge the air accumulated in the radiator, or open the exhaust valve of the gas collection tank installed on the top of the system to exhaust until each radiator is warmed up, the commissioning is completed, once the commissioning is completed, the valve should be fixed and cannot be opened and closed at will.

Secondly. When opening the valve, turn the handwheel clockwise, turn the handwheel counterclockwise when closing, and rotate in place according to the opening and closing indication marks. The radiator can not change the position arbitrarily, nor can it release water from the system at will, because if the hot water is lost, the water temperature in the pipe network will decrease rapidly, resulting in a decrease in indoor temperature.

In addition, if you find that the valve is faulty when you use it, you should stop using it immediately, find out the cause and clear the fault. If you can't solve it yourself, you should notify your unit or maintenance personnel in time to solve it.

The valves of the central heating cannot be opened by themselves. If you want to open it, you must first apply to the local heating company, and only after obtaining the consent of the staff can you open the heating valve. If you open the heating valve yourself, you are likely to face a fine, and the regulations are different in each region, and the local regulations shall prevail.

Heating refers to the supply of heat to the building and maintains a certain indoor temperature, which is a social service to solve the basic living needs of residents in northern China for winter heating.

Heating is the earliest building environment control technology developed by human beings. Since human beings know how to use fire, in order to resist the threat of cold to survival, they have invented heating methods such as ondols, stoves, fire walls, and fire grounds.

Central heating is a clean and high-quality heating method for the heating group to transport municipal heat to the user's home through the pipeline.

Answer: The valves commonly used in the heating system are: globe valve, gate valve (or gate valve), butterfly valve, ball valve, check valve (check valve), safety valve, pressure reducing valve, pressure stabilizing valve, balance valve, regulating valve and a variety of self-operated control valves and electric control valves.

Among them, the globe valve: used to cut off the flow of the medium, has a certain tempering performance, the pressure loss is large, and is commonly used in the heating system to cut off the flow of steam, and the gate valve with "J" indicates the globe valve in the valve model: it is used to cut off the flow of the medium, when the valve is fully opened, the medium can pass through the general pipe without changing the flow direction, so the pressure loss is small.

The regulation performance of the gate valve is very poor, and the "z" is used in the valve model to indicate the gate valve.

Check valve: also known as check valve or check valve, it allows the medium to flow in one direction, if the pressure behind the valve is higher than the pressure before the valve, the check valve will automatically close. There are many types of check valves, mainly including:

Lifting, swinging, etc. The lifting valve has a large pressure loss, so it is rarely used in the new heat exchange station system. It is indicated by an "H" in the valve model.

Butterfly valve: by changing the angle of the disc to achieve adjustment and switching, because the disc is always in the middle of the flowing medium, so the resistance formed is larger, so it is rarely used. It is indicated by a "D" in the valve model.

Safety valve: It is mainly used to relieve pressure when the medium is overpressurized to protect equipment and systems. In some cases, the micro-opening hydraulic relief valve has been modified to be used as a system pressure regulator. There are many structural forms of safety valves, which are indicated by "Y" in the valve model. Center.

Why is the first valve of the heating pipe: it can't be fully opened.

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Why is the first valve of the heating pipe: can not be fully opened, I feel as follows; 1. The valve is stuck, and there are debris in the valve, which causes the valve to be open normally. When this happens, try opening and closing the valve several times to allow the fluid to wash away the impurities.

2. The valve is overtorque, causing the valve to be stuck. When the torque is excessive, the limit of the corresponding combustion line can be adjusted by artificial methods, so that the limit value is changed, so that the stuck position becomes the normal position, and then returns to the original limit value after adjustment. 3. Hold pressure, the pressure difference between the two ends of the valve is too large, resulting in the valve cannot be opened.

When the valve is holding pressure, the safe way to take is to relieve the pressure, so that the pressure at the end of the high pressure drops, so as to reduce the pressure difference and open the valve.