The check valve for the pump is an essential element of the pumping stations. With it, you can determine the direction of movement of water. The device shuts off the pipeline section, any equipment or pump in case of emergency. The operation occurs automatically, the energy of the working environment acts on it. This reinforcement has a direct effect.
Principle of operation
The non-return valve for the pump has the purpose, expressed in protecting the system from critical changes in flow parameters. Reverse spinning of the wheel can occur if the pump stops or the fluid drains into a well or well. The result may be damage to the unit.
The valve has an actuator that eliminates the return flow, preventing hydraulic shocks that can affect plumbing equipment and piping. The non-return valve for the pump has a sealed spring-loaded shutter, which increases the efficiency of the self-priming submersible pumps.
If we are talking about a non-return spring valve for domestic use, then their conditional passage can vary from 15 to 50 mm. Protective devices guarantee:
- bandwidth
- low noise level;
- operational reliability in the working position.
The spring counteracts the flow. If the valve is opened, the pressure of the pump will be reduced by 0.25 to 0.5 atmosphere.
Check Valve Characteristics
The non-return valve for the pump is made of brass, which forms the basis of stampings of the housing elements. The alloy is characterized by resistance to aggressive substances by type:
- mineral salts;
- manganese;
- sulfur;
- oxygen;
- organics;
- iron compounds.
They are in suspension or dissolved in water. The outer surface of the valve is plated. The check valve for the water pump has a spool, which is made of an alloy of zinc with copper. A high-strength polymer can also be used for this. The sealing gasket located between the locking discs can be made of silicone or rubber. As for the spring, it is made of special grade stainless steel.
Additional Features: Basic Features
If you want to get acquainted with the design of the check valve, then it is important to know its main elements, among them:
- compound body;
- working body;
- executive body constipation.
As for the composite housing, it consists of a spool chamber, coupling elements with threads at the outlet and inlet. The working body is a spool of the rod, a tight interdisc gasket and two spool plates. The actuator is a spring located between the seat and valve plates. She acts as a limiter in the body of the body.
Reviews of different types of check valves
The non-return valve may have a spring-loaded coupling form. He has a collapsible case, which has a threaded connection. Buyers emphasize that this design has a sealed gasket, which is located between the shutter elements. On sale you can also find valves that have brass spool. According to customers, the main distinguishing features are throughput.
This quality should be noted, especially when compared with traditional fittings. Consumers quite often also choose combination valves, which can reduce the number of mounting connections, reduce the hydraulic resistance of valves and ensure system reliability, simplifying the installation and maintenance process.
Reviews about the features of installing a valve for a vacuum pump
The non-return valve for the pump, the price of which is 1650 rubles, is installed on the suction pipe, it is necessary to position the device in front of the pump or after ratchet. The latter option is most often used, because other installation methods sometimes limit the amount of water to drain into the suction pipe. Among other things, the pump along with the liquid in this case sometimes traps air. Such work can be accompanied by noise.
The non-return valve for the vacuum pump can be located upstream of the receiver, in which case it is installed anywhere in the discharge pipe. It is recommended to do this in a place that will be convenient for maintenance of the structure. According to consumers, the valve must be connected in front of the pump through the slope, which is required to replace the design. If you install the device in the suction pipe, then the drive in this case, according to consumers, is not required. The check valve for the submersible pump can be installed in an existing system. In this case, according to consumers, it is necessary to position the device between the station and the pump. A gap is made in the pipeline, and an aggregate is installed on one part of it with the help of a drive.
Valve principle for a well pump
The check valve for the downhole pump is necessary to exclude the movement of the water flow in different directions. And to understand the need for valve installation, you should consider the processes that occur in the system when the pump is turned off and on. If it is turned on, water will rise from the well and flow to the points of water intake. In the absence of the required water consumption, it will accumulate in the accumulator until the upper pressure threshold is reached. In this case, the relay will turn off the pump. A reverse water flow will not occur, as this will be prevented by the pressure created by the pump.
If it is turned off, then the pressure will disappear and nothing will prevent the water from flowing back into the well. In order to avoid this, a check valve is used. Without it, when the pump is off, there will be no pressure in the system. Each time you turn on the pump, you would have to refill it with water.
Conclusion
When choosing a non-return valve, it must be taken into account that it can have certain design features, which allows us to classify these devices. They can be represented by gates and, in fact, valves. The first are in the form of round disks that are installed on vertical and horizontal sections of the pipeline.
As for the valves, they have the form represented by spools, which can only be operated on horizontal sections of the pipeline. As for the design of the locking element, it allows us to subdivide the valves into several more groups, among them are lifting devices, ball valves and rotary check valves .