Check valve for the pump: characteristics, operating principle and feedback. Check Valve for Vacuum Pump

The check valve for the pump is an obligatory element of the pumping stations. With its help you can determine the direction of water movement. The device disconnects the pipeline section, any equipment or pump in the event of an abnormal situation. The trigger occurs automatically, it affects the energy of the working environment. This fittings has a direct effect.

Principle of operation

The check valve for the pump has an assignment, expressed in protecting the system from critical changes in the flow parameters. The reverse unwinding of the wheel can occur if the pump stops or the liquid drains into the well or well. A consequence may be a failure of the unit.

The valve has an actuator that eliminates the return flow, preventing hydraulic impacts that can affect the plumbing equipment and pipeline. The non-return valve for the pump has a sealed spring-loaded valve that increases the efficiency of self-priming submersible pumps.

If it is a question of the return spring valve of a household purpose, the conditional pass at them can vary within the limits from 15 to 50 mm. Protective devices guarantee:

• Bandwidth;
• Low noise level;
• Operational reliability in working position.

The spring counteracts the flow. If the valve is opened, the pump pressure will be reduced by 0.25 to 0.5 atmosphere.

Characteristics of the non-return valve

The non-return valve for the pump is made of brass, which forms the basis of the stampings of the housing components. The alloy is resistant to aggressive substances of the type:

• Mineral salts;
• Manganese;
• Sulfur;
• Oxygen;
• Organics;
• Iron compounds.

They are in water in a suspended or dissolved form. The outer surface of the valve is covered with galvanic composition. The non-return valve for the water pump has a slide valve, which is made of a zinc alloy with copper. The high-strength polymer can also be used for this. The gasket, located between the locking discs, can be made of silicone or rubber. As for the spring, it is made of stainless steel of a special grade.

Additional characteristics: basic structural elements

If you want to become more familiar with the design of the non-return valve, it is important to know its main elements, among them:

• Compound building;
• working body;
• An executive organ of constipation.

As for the compound housing, it consists of a spool chamber, coupling elements with thread at the outlet and the inlet. The working body is a spool made of a rod, a sealed interdisk gasket and two spool plates. The actuator is a spring located between the seat and the valve plates. It acts as a limiter in the body of the body.

Feedback on check valves of different types

The non-return valve can have a spring-type coupling. He has a dismountable body, which has a threaded connection. Buyers emphasize that this design has a sealed gasket, which is located between the elements of the shutter. On sale, you can also find valves that have a brass spool. As their main distinguishing features, according to customers, is the bandwidth.

This quality should be noted, especially when compared with a traditional-shaped fittings. Consumers quite often choose also combined valves, which can reduce the number of mounting connections, reduce the hydraulic resistance of the valve and ensure the reliability of the system, simplifying the installation and maintenance process.

Reviews about the features of installing a valve for a vacuum pump

The check valve for the pump, the price of which is 1650 rubles., Is installed on the suction pipe, it is necessary to place the device before the pump or after the ratchet. Most often, the latter option is used, because other ways of installation sometimes limit the amount of water for draining into the suction pipe. Among other things, the pump, together with the liquid in this case, sometimes captures air. Such work can be accompanied by noise.

The check valve for the vacuum pump can be located up to the receiver, in this case it is installed anywhere in the discharge pipeline. 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 before the pump through the drill, which is required to replace the structure. If you install the device in the suction pipe, then in this case, in the opinion of consumers, there is no need to drive. The check valve for the submersible pump can be installed in an existing system. In this case, according to consumers, it is necessary to arrange the device between the station and the pump. A rupture is made in the pipeline, and an aggregate is installed on one part with the help of a hose.

The principle of operation of a valve for a downhole pump

A check valve for a downhole pump is necessary to prevent movement of water flow in different directions. And to understand the necessity of installing a valve, you should consider the processes that occur in the system when the pump is turned off and on. If it is turned on, the water will rise from the well and flow to the water intake points. If there is no necessary water consumption, it will accumulate in the accumulator before reaching the upper pressure threshold. In this case, the relay will turn off the pump. The reverse current of the water will not occur, since this will interfere with the pressure created by the pump.

If it is turned off, the pressure will disappear and nothing will stop the water from flowing back into the well. In order to avoid this, a non-return valve is used. Without it, when the pump is off, there will be no pressure in the system. Each time the pump is turned on, you have to re-fill with water.

Conclusion

When choosing a check valve, it must be taken into account that it can have certain design features, which makes it possible to classify these devices. They can be represented by closures and, in fact, by valves. The first look like round discs, which are installed on vertical and horizontal sections of the pipeline.

As for the valves, they have the form represented by the gilders, which can only be operated on horizontal sections of the pipeline. With regard to the execution of the locking element, it allows to subdivide the valves into several groups, among them - lifting devices, ball valves and check valves .