The basic components of heating systems private homes are, of course, boilers, pipelines and radiators. However, providing quality heating rural buildings is impossible without the use in such communications, various additional elements. For example, to increase the efficiency of the heating system in some cases, using this device as a bypass. Related articles:
The question of «boilers» — 1 reply
Used sites of this type in the Assembly as one-pipe and two-pipe heating systems. Also bypasses are often the elements of design of modern systems of «warm floor». Quite often such devices are used in small loops of strapping wood-fired boilers.
What is a bypass
Is this device a piece of pipe embedded in the circuit between the outlet and inlet sections of the pipeline of any element of the system. Most often, in heating networks bypasses are used for mounting:
- circulation pump.
In English the word «bypass» is translated as «the bypass». That is, through a cut in the heating system if necessary, you can let the coolant flow in the bypass highways of the wiring.
The bypass in one pipe communications
The largest number of bypasses is typically used in such heating systems. One of the main drawbacks of heating systems of this type is uneven heating radiators. This is due to the fact that moving from battery to battery, heated in the boiler water begins to cool.
Through the last in the chain, radiators coolant as the result is already not hot, but warm. Accordingly, the premises in which installed these battery heated much worse than others.
To solve this problem in one-pipe networks and are structurally simple device as bypasses. Nodes of this type in such systems are usually collected for each radiator. In case of partial overlap of the valve on the outlet of the battery some of the water begins to flow through the bypass. As a result, until the last of the radiators it comes a lot faster not having to cool.
What else can be used
In addition to providing uniform heating of areas, using bypasses in single-tube wiring, home owners get the opportunity:
- quickly switch the network for the natural flow of water in case of breakdown of pump or power outage;
- to change or repair the radiator and pump without having to disconnect the whole system;
- to carry out quick draining and filling of the heating system of the house.
Pumps in one-pipe heating network is often cut into the road on the bypass with three valves. During a power outage that shut-off valves just shut off. As a result, the water begins to flow through the pipe freely, bypassing the pump, simply due to the difference of pressures at the inlet exit.
In the presence of a bypass pump or the radiator, among other things, with absolutely no problems at any time may be removed for repair or replacement. After closing water faucets in this case also will bypass the jumper, and the owners don’t have to turn the boiler off.
The main types of bypasses
Mounted when the installation of heating systems can the nodes of this variety:
The second type bypasses the heating system is a simple section of pipe. The design of the automatic bypass devices further included a check valve. Such bypasses are intended to tie-in loop heating systems circulation pumps.
The design of the bypass valve performs the following functions:
- protects the pump from water hammer and, consequently, jamming of the shaft and destruction of the impeller;
- facilitates the operation of the pump;
- prevents recirculation of the coolant.
The benefits of using bypasses
The installation of such equipment, thus allows:
- to simplify repair and maintenance of the heating system a country house;
- to increase the efficiency of the network;
- to reduce fuel consumption for heating.
Insert the bypass circuit heating system in a horizontal position, among other things, allows you to avoid getting into the pipes and radiators of air. And this, in turn, prevents rusting of the equipment and significantly increases its service life.
Installation of radiators on the bypass
The pipes of the heating system, depending on the circuit wiring, the batteries can connect:
Bypasses at adjustment of heat sinks can be used in all these three cases. Is the installation of bypass jumpers shall observe such rules:
- the diameter of the bypass shall be on the smaller size section of the main pipe system;
- with one-sided connection by-pass jumper is mounted as far away from the riser and closer to the radiator;
- between the bypass and the riser is not installed, no valves.
Used for radiators bypasses, design elements which are:
- a section of pipe, the length of which slightly exceeds the width of the battery;
- two tee mounted on both sides of the cut;
- two short pipes connecting the tees with the connections of the battery.
A bypass in the piping of the circulation pump
Single-pipe heating system forced type going today in most cases using a ready factory of by-pass pumping groups. But sometimes sites of this variety, the design of which is nothing complicated is not represented, the owners of country houses and harvested with your own hands.
In any case, and factory, and a home-made pump units heating systems usually consist of the following elements:
- two tees;
- two tubes G-shaped with embedded in them taps;
- sump mounted before the pump;
- the pump itself.
Sometimes, as already mentioned, the bypass injection equipment also contribute to the non-return valve. On the stretch of highway between G-tubes pump groups in the sidebar to the system in most cases set the third tap.
Mounted the pumps on the bypass to the feed pipe and outlet. In any case, they crash the system usually in the vicinity of the boiler.
Most often this type of group is still installed on the return pipe. The supply in the Assembly of heating systems private homes the nodes are installed with modern expensive pumps capable of working with very hot coolant.
A bypass two-pipe systems
When mounting the radiators in such networks bypasses are not used. Indeed, in this case, the heat transfer medium to each battery originally supplied by one circuit and discharged at another. This design ensures uniform heating of all radiators in the house. Disable any battery in need of replacement or repair of such systems and without the bypass jumper is possible without turning off the heating unit.
Radiators in two-pipe networks, thus, connected directly to the mains. However, the bypasses, of course, used in systems of this kind. As in the single-pipe networks in two-pipe with their application mounted circulating pumps. Function stroke the jumper in this case do the same.
The system «warm floor»
Equipment of this type can make living in a country house or apartment very comfortable. Therefore, it is mounted by owners of residential property quite often. In the systems «warm floor» is installed in the bypass distribution reservoirs. In such nodes, this element is additionally equipped with a control valve.
A bypass is installed in the system «warm floor» between the outlet and inlet combs. The main purpose in this case is the elimination of water hammer and education sparse areas. Through the use of bypass valves in the system «warm floor» in this case it is possible to accurately set the required pressure level.
The bypass for the boiler, working on solid fuel
In heating units of this type, cast iron heat exchangers during the heating of the coolant for the entire heating system at very high loads. In the lower part of them in this period comes the cold water. On top of the heat exchanger enters the coolant heated to very high temperatures.
Cast iron is known — the material is relatively fragile. So serious difference in heating parts of the heat exchanger can easily lead to cracking of its walls. To avoid this, when performing strapping solid fuel boiler by-pass, embedded in the system between the flow and return, creates a small loop of coolant flow.
Included by-pass jumper to the system in this case with the use of the three-way valve. Upon reaching the desired temperature in a small loop, this node reveals the entrance of the return, whereby in circulation the coolant switches on the main circuit.
The use of bypass in the piping a wood boiler allows, thus, to ensure a smooth release of the equipment at a given heating power. Through the heat exchanger in the presence of the embedded circuit jumper is always water about the same temperature. The heating after the arrangement of the small boiler circuit runs smoothly without harmful spikes.