What is a bypass valve and how does it work?
It is impossible to feel comfort even in the most comfortable andModern apartment, if the room is cold. Therefore, the first priority task should be to equip an efficient heating system. Heating should provide the most pleasant microclimate, because too high temperatures - it's even worse than cold. To avoid falling into such extremes, engineers created a simple, yet functional and practical device. This is a bypass valve. People who are far from heating may not be aware of the existence of such a device. Let's find out what it is, why and how it works.
What it is?
This device is a tube jumper that is mounted between the straight line and the reverse of the heating battery. The transverse diameter is smaller than the size of the main tube.
The main function of the bypass valve is the returnexcess water back into the riser from the radiators, when a manual or automatic regulator measures the volume of the coolant. The latter, by means of this valve, moves parallel to the control and shut-off valves.If the heating systems did not have thisdevice, the repair of radiators would be impossible at the time the system is in working order. With the help of valves, the filling and emptying processes are simplified.
In addition, the installation of a bypass for heatingprovides reliable operation of equipment when there is no electricity in the network. At the time of power failure, the bypass closes the taps that supply the coolant to the pump. And on the main pipe the central tap is turned away. Using bypass, you do not have to turn the cranes manually. With this device, everything will happen automatically. This is a huge plus - the users note.
Most often in apartments installedsingle-pipe heating systems. In such systems, the heat transfer of the first radiator affects the operation of the following. This is true for vertical as well as horizontal schemes. If there is no bypass, the batteries will be connected in series. As a result, all the heat will be taken away by the first battery, and the rest will get at best a warm, if not cool, coolant.To prevent this from happening, the feed pipe and the return flownear each radiator is connected by a bridge, guiding part of the water around the battery. The principle of the bypass valve is to give the same amount of heat to near and far radiators and to reduce their dependence on each other.
Bypasses are used in a variety of heating systems. There are two main types - with or without a check valve:
- The former are used with circulation pumps. Involved them as necessary. When the pump is running, the valve turns on and opens, and then, under the pressure that is created by the pump, flows the coolant.
- Valveless bypasses make it possible to repair one part of the system without disconnecting the whole heating.
This device can perform several functions and apply in different ways. Below we will look at what the bypass valve is responsible for in different heating system circuits.
Bypass in single-pipe heating
In heating systems, this device helpsForm alternative heat carrier flows around the heating main and components. In multi-storey houses, the valve will help in the process of repairing the batteries in winter. By redirecting the flow bypass, you can easily replace or repair the structural part of the system. You can install the device in any part of the heating main.In addition, in single-pipe systems, the bypassthe valve regulates the heat transfer. The main function is to remove the excess coolant back into the riser when the thermostat changes the volume of the coolant. Another function is to accelerate filling and emptying the system even when manual control valves are not installed.
In the temporary absence of electricity in systemswith a circulation pump, the installation of a bypass for heating ensures trouble-free operation. Due to the control valve, the system will operate in natural mode.
Often with the help of these devicesperfect single-pipe heating. The use of bypass is actual in old houses built in the USSR. These houses are already morally obsolete, and in the apartments it is very hot in the winter. To optimize the temperature regime, this valve is used. After installation, the volumes of coolant supply can be regulated.It works like this. The water enters the system from the boiler or from the central heating boiler in series, but by using the bypass it passes the radiators. When she finishes her circle, she will return to the cauldron. Due to heat transfer, the temperature of the liquid is significantly reduced, and then the coolant enters the radiators.
Features of using bypasses in two-pipe systems
Such heating systems can work ondifferent schemes. But it is also useful to install a bypass valve. It will make it much easier to control the flow of the coolant. If necessary, you can control the filling of radiators. It is also possible to adjust the heat transfer.
After we learned what is bypassthe valve in the heating, it is necessary to learn the installation features. At installation it is necessary to consider the certain factors on which the efficiency of the heating system depends.So, the diameter of the valve should be less thanthe size of the heating pipe. The temperatures at the bypass installation locations must be the lowest. The device should be as close to the battery as possible, and, on the contrary, away from the riser. Installing the bypass valve horizontally avoids the entry of air into the system. For prompt dismantling, it is necessary to have shut-off elements on the bypass.
Installing the bypass channel for heating batteries
By installing new batteries in a single-tubeheating system, the first step should be to allow the drainage of the liquid. Then they collect the radiator hood - cut out the old cast iron from the bulgarian, untwist unnecessary pipe sections with idle cranes. Then the thread is cut and the design of the tee, extension, and ball valves is assembled.
Installation with circulation pump
If it is necessary to install a circulation pump, a filter is mandatory.Depending on the pump type, a suitablebypass. In the case of a pump that has contact between the rotor and the coolant, a bypass is set on the return and on the supply line. When the rotor of the pump with water does not contact, the bypass is placed only on the return pipe.
Saving with bypass
Installation of a bypass valve will not only lead tomore comfortable operation of the heating system, but also to save electricity. So, on average, the volume of coolant in systems equipped with a valve grows by 30-35 percent. This increases the overall heat dissipation of the batteries.
Now it is clear how the bypass valve works,where and in what cases it is applied. Specialists recommend installing this device in all modern heating systems. The bypass valve greatly simplifies the operation of the heating system and makes it possible to repair individual units without completely turning it off, which is very convenient.