Check valves for water are a type of protective fittings for pipelines, which is designed to counter the change in the flow of medium in the return direction inside the technological system. For example, if the pump fails, it will not allow water to move in the opposite direction.
Check valves for water can be spring-loaded, spherical, wafer, angled, flap. Their installation can be carried out on a vertical or horizontal section of the pipeline. These devices are widely used in water intake systems from wells or wells using pumps, when an autonomous
water supply system is being installed
. They are also indispensable for sewage systems, since in the case of blockages they prevent the
return of wastewater
. Check valves for water have such an important and special function as work in the mode of not only normal operation, but also in an emergency.
If there is a nuisance in the water supply system in the form of a leak, shutdown of the pump, pressure reduction in a certain area, this device will serve as a rather effective protection. The non-return valve for water, the price of which depends on the material of manufacture and varies between 300-1000 rubles, is quite simple in a constructive plan. It closes automatically, counteracting the flow in the opposite direction. Valves are made of steel, cast iron, brass and plastic. Stainless steel fixtures are renowned for their high quality and superior performance.
The single-flange wafer version is characterized by a wide range of possible environmental temperature conditions, quick installation, reliability, and also excellent indicators of the maximum pressure that can be in the network. To prevent the flow direction from changing in the pipeline, a two-way valve is installed. These devices do not use gaskets, because the case itself is equipped with additional gaskets. Check valves for water have many advantages: low weight and length, a high degree of tightness and reliability, and are also easy to install.
According to the principle of operation, this type of reinforcement is very simple. If there is no pressure, and the flow rate in the pipeline is zero, then the shut-off element is in the closed position. This is achieved by its own weight or by means of a spring, which puts pressure on it. If the flow rate is above zero, then the saddle opens with a locking element, providing fluid movement with minimal resistance. When the flow begins to return movement or stops, it is blocked by this element, which is pressed against the saddle. Plastic
water non
- return
valve works on the same principle as all other types. When using this type of reinforcement, it should be borne in mind that the weight of the locking element and the force of the spring sometimes require
excessive pressure to open it.