Why use a shut-off valve
Shut-off valves - what, how, where and when?
Who himself Hands on his lines, is initially faced with a tangle of pipes, lines and valves. But before you connect the new dishwasher or bathroom faucet, for example, you should deal with one valve in particular: the Shut-off valve.
Table of Contents
What are shut-off valves?
In principle, a shut-off valve is always there to do that Open and close of Check pipelines. They are used in both liquid and gas lines and are primarily used when components need to be replaced or serviced in order to stop or restart the flow.
But also for regulation one uses these valves. They can therefore be seen most frequently on the Water pipes, usually near the water meter, and on the pipes to radiators.
Where are shut-off valves used?
Shut-off valves are generally used in the various areas used. These include, among other things, the drinking water installation, heating and cooling systems as well as solar equipment. Depending on the area in which you need a shut-off valve, between A distinction is made between taps, valves, gate valves and flapswhich each have different properties.
Why should a shut-off valve be used?
In contrast to others Shut-off valves it is possible with shut-off valves to use a uniform flow pattern to create. This means that you can use it not only to turn off the current, but also to turn it off regulation.
How are shut-off valves used?
The valves are there for that Flow rates in a pipe too check and to specify and to conclude them securely at the same time. The more you close the valve, the lower the flow will be until it finally stops completely.
Which shut-off valves are there?
Generally be four forms of the shut-off valves, which we would like to briefly introduce here. It is important to know for which purposes the various valves are used.
Straight or straight seat valve
At Straight or straight seat valve the inlet and outlet for the liquid or gas are in the same direction. It should be noted that the four deflections at right angles can lead to enormous pressure losses. This valve is most often found on heating pipes for temperature control.
Angle valve and angle seat or free-flow valve
The Angle valve offers an entry and exit angle of 90 degrees. At the Angle seat or free-flow valve In contrast, the inlet and outlet pipes are at a 180-degree angle to each other, but the valve itself is attached at a 45-degree angle. Both promise a lower pressure loss than the globe valve, as the flow does not have to be diverted as much. These valves are used, for example, when installing dishwashers.
The combined free-flow valve with non-return valve (in short: KFR valve) is a special form of the angle seat valve. This is particularly important for drinking water pipes, as it prevents the water used from flowing back into the outlet pipe. This backflow preventer must always be used in the direction of flow and must be located behind the water meter.
The Three-way valve is a special form in which two inlet pipes are connected to one outlet pipe and which is used to mix two streams. The latter is mostly used to regulate the temperature of the heating fluid.
Manual vs. electromagnetic valves
In addition, between manual and solenoid operated shut-off valves. The former have a handwheel or spindle that regulates the flow. The electromagnetic valves are set in motion by a valve drive.
Maintenance is important!
It should be noted that Isolation valves should always be serviced. Otherwise, leaky valves can cause enormous water damage or the valves can rust and thus no longer be used to close a pipe.
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