Rating of the best pressure switches for a pump for 2024

Decentralized or autonomous water supply systems are installed strictly according to schemes. To them is given a list of requirements and calculations that are mandatory. However, to ensure the reliability and efficiency of the water supply system, installing a high-quality source and laying pipes alone will not be enough. You can't do without a well-thought-out wiring diagram and automation that would be responsible for controlling the pump. The design is based on the use of a water pressure switch, which is installed in the pumps

The simplest and cheapest solution is to buy a pressure switch that can be turned on and off as needed. The compact and well thought-out device is responsible for maintaining the pressure inside the structure, making the head optimal. However, in pipe systems, the installation of such a unit is undesirable due to the complexity of communications, in which it is necessary to constantly monitor the main parameters of the equipment. In this case, it should be noted the preference for more advanced block-type automation, which includes a variety of sensors.

Principle of operation

To fix the unit, a spring pressure group is used in the structure. The contact closes when the minimum pressure is reached. After that, it turns on in automatic mode. At the moment when the maximum ratio (set by the user) is reached, the pumping unit will turn off, since the contacts will open. The design is equipped with special adjusting mechanisms that allow you to manually adjust the value.

It should be noted that the best manufacturers equip their products with a forced or dry start button. Also, the design can have auxiliary connectors (instead of the usual terminals) necessary for connection, a soft start button and an operation indicator.

Functional parameters

The selection criteria for such a device are versatile. Such a choice should be made only after purchasing the pumping station itself, as well as a hydraulic accumulator. During the purchase process, you should focus on the parameters of the working network used:

• the head in the chamber of the installed accumulator;
• the minimum pressure value that is set by the user;
• maximum value at which automatic shutdown will occur.

It should be noted that in the chamber (air) of the accumulator should be 0.2 atm less than in the water supply structure (recorded by the sensor). Otherwise, the elastic plate will soon become unusable.

There are such types of structures:

1. Manager. The signal goes to the power control unit.
2. Powerful. Power contacts are connected to the pumping unit.

Before purchasing, it is necessary to check the permissible switching power of the structure.

Characteristics and pressure setting

This equipment is small in size, the package of which includes a fitting, with the help of which the subsequent connection to the pipeline network through the terminal group is carried out. You will need these accessories to dock the device with electrical cables. More detailed information is provided by the manufacturer in the form of step-by-step instructions that can be applied at home. The springs assist in recording pressure-related parameters by means of a threaded regulator.

The more the springs are compressed, the more force will be applied, and the higher the coefficient must be in order for the relay to operate. A significant difference in pressure ratios is also allowed. The growth of the coefficient occurs by clamping the spring. You should pay attention to the fact that in domestic conditions, factory settings are used, which fully correspond to the tasks set. Used in popular models and accumulators. Even with optimal standards, in some cases personal user intervention and manual adjustments may be required.

How to regulate

Numbering	Sequence of actions / adjustments
1.	Regular models are equipped with several springs with different diameters.
2.	A large spring is used to control the coefficients.
3.	A small spring shows the current difference in levels.
4.	In the process of compressing the large spring, the maximum and minimum indicators will increase simultaneously.
5.	As the small spring is compressed, the superiority of the maximum ratio will become more evident. Thus, the maximum indicator will prevail.

DIY installation

The pressure switch, according to buyers, is best installed directly at the outlet (to the accumulator). In this section, there is a significant leveling of flow turbulence and pressure surges during the normal operation of the pump and during its start-up. Also, among the common mistakes when choosing a device, there is a lack of due attention to the recommendations of the manufacturer itself, regarding the performance of branded equipment.

The main limitations are related to the microclimate. Most of the popular models function normally at temperatures of + 4 ° and above, as well as humidity of 65% or less. Such equipment should be installed in well-heated rooms. Before installing the control sensors for pumping equipment, you should independently install the following elements (most of them are installed at the construction stage):

• sewer drain;
• check valve;
• filter responsible for fine water purification;
• inlet valve;
• pipelines;
• pump;
• coarse filter.

New items in the field of relays are equipped with special fittings that facilitate the process of connecting the structure to other elements of the system. Some budget models can be installed in a unit with a pump. Units that have adequate protection against water can be installed in a well, a caisson or with a pump. Description and equipment will depend on the selected model.

It is recommended, in addition to the main selection criteria, to pay attention to the humidity and temperature coefficient that is optimal for the operation of the structure, which has a huge impact on the device, its operational life and performance.

What to look for when buying a product from an online store

1. Before starting the installation of the unit, you must order a high-quality pressure gauge online, without which it will be difficult to monitor the operation of the product. Installation is carried out on the pipeline. This will help control the pressure ratio within the system. Do not neglect this, because external signs can sometimes be incorrect.
2. The preference should be given to the rating of quality manufacturers. Counterfeits negatively affect the operation of the system, which can lead to an emergency and breakdown of individual elements.

It should be noted that the greater the difference between the maximum and minimum coefficient, the larger the volume of liquid will be in the accumulator. In this case, it is practically not necessary to resort to turning on the pump.

3. Household kits performed better under conditions of regular use. In this case, the maximum coefficient should not exceed 4 atm. Working range - 1.4-2.8 atm, for plumbing.

How much does the kit cost

When choosing high-quality electrical equipment, it is necessary to navigate simultaneously according to several criteria. Cost is considered to be an important aspect. In construction markets, the proposed products will cost a modern buyer $ 5-150, depending on the brand name and basic characteristics. Before going to the store, it will not be superfluous to see what types of relays are and get acquainted with their purpose.

Experts recommend making such purchases online, through numerous online stores. This will allow you to significantly save and spend as much time on choosing a product as it takes.

Which company is better to buy

The principle of the devices below is not visibly different. The simplest algorithm for their functioning is applied:

• the relay connects to the pumping system at the moment when the coefficient in it reaches a critical level;
• when the maximum indicator within the system is reached, the relay will automatically break the connection between the established contacts.

ACP

One of the best and most popular models is the PM-5. Design from a Chinese manufacturer, which is often confused with a dry running product. When reviewing the provided characteristics and schemes, you can come to the conclusion that they differ. The advantages include the price of the kit. This cost has a dark side too. The main disadvantages include:

• the warranty period is a very cloudy value, they do not live up to its end;
• there is no real protection against dust and moisture;
• ordinary contacts are used, not silver-plated (at a key moment, the contacts may not open).

Grundfos

Reliable designs from the time-tested Danish concern. His reputation is clean.

• a huge range of quality products;
• the main difference between the models is the response limits;
• only some devices are classified as low-current (such devices cannot be connected directly to the network, and in rooms with a high humidity indicator);
• high reliability indicator;
• protection level - IP52 (caissons and basements - this is an incomplete list of premises in which their installation is allowed).

Based on numerous reviews, it can be concluded that the cost of structures, like the recognition of products, is based on the popularity of the brand. Products of a domestic manufacturer, similar in characteristics, are in no way inferior to foreign ones, besides, their average price is much lower.

Italtecnica

Products from the Italian concern. It is such a kit that is best bought for a private house. Along with the pumping equipment, a modification called –PM / 5 is used. It conquers the markets due to its high reliability, quality and acceptable cost.Installation takes place in the cold water circuit. The regulation limits are measured in bars and have a value of 1 (for the lower) and 5 (for the upper). The warranty period is one year.

Provided that the general system is connected to the station, and not to the pump, the complete set will be carried out with modification G. The main differences are within the setting, which will be 1.4-2.8.

• insulating gasket on the body;
• use of a special coating (non-stick);
• the contact group consists of copper lamellas;
• case material - plastic.

Condor

An excellent sample from the German concern, which has won many positive reviews from users. A feature of the models is that they show complete reliability in operation.

• the diameter of the connectors allows the connection of the pressure gauge;
• ease of repair;
• have universal settings in comparison with similar devices;
• through rotation, adjustment is carried out;
• the main element is two-pole (both zero and phase open simultaneously).

• overpriced.

Unipump

Domestic manufacturer whose products are focused on the European market. In addition to an acceptable cost, they are characterized by the release of high-quality products. They gained a high rating largely due to various modifications.

• joining is only ¼ inch;
• pressure gauge included;
• works in conjunction with pumps with a capacity of 1.5 kW or less.

• marriage is common.

Danfoss

The most popular series of this Danish manufacturer is considered to be the KP-1. The cost of the kit is high, however, more than justified.

• a tuning scale that does not imply the use of a pressure gauge;
• the contacts used are gold-plated, which makes "sticking" almost impossible.

Popular relay models

Among the numerous components for water supply systems that are present on the Russian market, the main categories can be distinguished. Expensive models have an upper limit of 4-8 atm. Most masters advise purchasing options such as:

• Grundfos FF 4-8;
• Grundfos FF 4-4.

Their limit is standard - 8 and 4 atm. The main advantage of such an acquisition will be the ability to self-adjust. It should be noted that both models belong to the category of low-current products, therefore it is inappropriate to connect the units to a 220 V network. For ease of use, it is recommended to use a special control panel. Also, not every family can afford such a purchase.

Often the buyer makes a choice in favor of a cheap and affordable unit. For example, a 4 atm device will cost 4000 rubles, while its 8 atm counterpart will cost 6000 rubles.

Inexpensive models also have a limit of 5-8 atm. An example is the constructs MDR 5-8 and MDR 5-5. The indicator of the upper limit is 8 and 5 atm, respectively. The first acquisition will cost 2.9 thousand rubles, while the second will cost 2.1 thousand rubles. Installation of both devices is carried out on the diaphragm tank. It is allowed to connect to a 220 V network, as well as with an indicator of 380 V. For the first case, you will need a single-phase pump. Otherwise, you will need to purchase a three-phase model. Their current indicators are high. They are also characterized by an excellent degree of reliability.

Budgetary designs. These include PM-5 from the Italian concern. Copes with the tasks set by 100%. It is worth noting that the average price for such a product is several times less than that stated by Grundfos. The price of the device is 400 rubles. Works well in conjunction with domestic pumping units. Among the positive characteristics, it is necessary to pay attention to the quality indicator and the ability to work with a 220 V network.However, during the connection process, you may encounter some difficulties. Connection to a 320 V network is not possible.

Rating of the best budget relays

If you are looking for inexpensive designs, then they can be purchased for $ 10.They are characterized by a simple device and a set of basic characteristics, as well as low accuracy. However, the main disadvantage is the operational time. The cheapest set is not the best option to buy. The initial cost will be minimal, but the purchase of a new relay or accessories will soon be required.

In the event that large spending is not planned, but it is necessary to establish an uninterrupted water supply, then you should pay attention to the middle price category. Such models are distinguished by an acceptable indicator of accuracy and high reliability. The cost of the set will be $ 20-40. Among the main advantages should be noted excellent functionality at an acceptable cost. It is thanks to this that there is an increased demand for them among modern consumers.

Best cheap relay models

Italtecnica PM / 5-G

The relay is made in Italy. Optimum feeding is carried out from a 220 V network. Inside the system, water should not exceed a temperature of 40 ° C. The main indicator is adjustable in the range of 1.2-2.5 bar. For a switch, this figure is 1.8-4.5 bar. The kit includes a threaded nipple ¼. The permissible power indicator is 15.4 thousand watts.

Price - 700 rubles.

• acceptable price;
• manual adjustment;
• assembly.

• not detected.

Aquario PS-5/2

Italian assembly from a well-known brand. It is powered from a 220 V network. The working pressure coefficient will be 10 bar. Factory settings are standardized: off - 2.8 bar, on - 1.4 bar or less. Manual adjustment permits and allows operation in the range of 1-5 bar. The declared protection class is IP54. Operates in systems with cold water, while the temperature of the working environment should not exceed 40 ° C.

Cost - 650 rubles.

• acceptable cost;
• design;
• there is a possibility of manual settings;
• build quality;
• protection class.

• there are fakes.

Jileks RDM-5

Excellent model from a domestic manufacturer. Make-up from the network is carried out from 220 V. The declared protection class is IP44, which allows installation in rooms with high humidity levels. It becomes possible to install auxiliary pumps, whose power will not exceed the 1100 W mark. The water temperature in the system should not exceed 35 ° C.

Price - 600 rubles.

• acceptable cost;
• quick installation;
• protection class.

• marriage often comes across;
• the declared protection class will not save the case from rapid corrosion;
• contacts burn out quickly.

WWQ RD-2

Model from a Russian manufacturer. The functionality allows you to work in systems where the water temperature does not exceed 40 ° C. Thread ¼ is used to connect the unit to the system. It should be noted that to ensure normal performance, it should not exceed 0.5 MPa. It is powered from a 220 V network. The manufacturer has a protection class IP44. This allows installation in rooms with high humidity levels. Also, the case is protected from small debris getting into the product.

Price per set - 550 rubles.

• acceptable cost;
• reliability indicator;
• ease of installation;
• protection of the case from moisture and dust.

• the dimensions of the connecting pipe may be insufficient for comfortable installation.

Unipamp LP-3

A budget device from a time-tested domestic manufacturer. It is a dry-running protection relay. Make-up is carried out from 220 V. At the same time, the temperature inside the system should not exceed 40 ° C. The declared protection class is IP44, therefore it can be used in rooms with high humidity levels. ¼ - diameter for connection. At a pressure of 0.5 bar or less, the equipment is turned off. Thus, the device will not run dry in the absence of water. It should also be noted that the operating medium used performs the cooling function that the device needs. The circuit will open at 2.8 bar.

Price - RUB 500

• acceptable cost;
• there is protection against idling;
• reliability;
• simplicity of design.

• operational period.

Rating of the best expensive relays

There are a huge variety of pressure switches for water, and sometimes it is not easy to make a choice. The category of expensive devices includes electronic mechanisms. Their main advantage is ease of use, including making settings. Due to this, they are characterized by the presence of a high accuracy of operation.

However, it should be noted that for private houses (household needs), this indicator cannot be called key. The accuracy of the actuation does not matter to the correctness of work.

For domestic water supply systems, expensive devices may simply not be suitable. This is due to the increased sensitivity of the sensors. In this regard, increased voltage will be required. If the choice was made in favor of such devices, it will be necessary to purchase auxiliary and no less expensive equipment that would allow maintaining a certain indicator in the network. Well-known brands produce products in the region of $ 40-75.

The best expensive relay models

Danfoss KPI 35G ¼

This model can rightfully lead any rating of quality designs. Presented by one of the best manufacturers. It is an electromechanical type control device that can be used in any conditions, both domestic and technical. High-quality equipment has received over 10 quality certificates and diplomas, which testify to the high level of reliability and efficiency of the products. The setting range allows you to work with indicators in the range of 0.2-28 bar. The swings can also be adjusted. Designed to work with gaseous and liquid media. Able to withstand significant loads. On request, the manufacturer can complete the device with gold-plated contacts.

Price - 6100 rubles.

• ability to work under high loads;
• high-quality assembly;
• use of quality materials;
• manual adjustment.

• price.

Grundfos FF 4/4 DAY

Equipment of Danish origin. Used to control pumping equipment. The model is an electromechanical device operating from 220 V. The declared protection class is IP54. Designed to function with a working pressure of 4 bar. The port is 3/8 ”threaded. Compared to various Chinese appliances of the same type, this equipment cannot be compared with it. The power of the equipment, the build quality and the materials used are quite high. It should be noted the ease of use of the purchased equipment.

Price - 6000 rubles.

• use of quality materials;
• design;
• reliability;
• ease of use;
• assembly.

• cost.

Condor Werce MDR 5-5

The brand of this device is considered one of the best manufacturers of pumping equipment and automation. Made in Germany and is an electromechanical sample with a permissible load of 5500 W. In fact, the pumps have sufficient power and are powered by a 220 V network. The designated protection class is IP54. Installation on a hot water supply line with a working pressure of 5 bar is permissible. The coolant should not exceed a temperature of 80 ° C.

Cost - 4700 rubles.

• installation is allowed in both hot and cold water supply systems;
• build quality.

• significant price.

Vortex ARD-1

A Russian-made product assembled in China. The functionality of the unit meets all the needs of a modern consumer. Watering mode is provided. In the presence of a function of protection against frequent start-ups, system breaks and leaks. If necessary, the system will carry out an independent restart, which will provide data on the water level. There is also protection against idle (dry) running. Powered by 220 V.The maximum load indicator is 1500 W. Equipped with IP65 protection.

Price - 3550 rubles.

• ease of use;
• quick installation;
• assembly;
• implementation of manual settings;
• initial characteristics;
• wide functionality.

• not detected.

Aquacontrol RDS-M 1-2

A product of a domestic manufacturer. This electronic equipment has quite extensive functionality. Leakage protection available. It is possible to automatically restart the system. Dry-running protection response delay - 0.5 minutes. Make-up from a 220 V network. The liquid temperature should not exceed 40 ° C. For connection, a 1.5 cm pipe is used. The power indicator is 1500 watts. Basic parameters are set quickly and easily. To do this, turn the screw with a screwdriver directly on the control panel.

Session	Adjustment range
Dry run protection	30-180 seconds
Disconnection	0-6.5 bar
Turning on	0-6 bar

The changes made can be observed using the arrow, which is located on the scale of the manometer provided by the manufacturer.

Price per set - 3000 rubles.

• acceptable cost;
• build quality;
• design;
• making adjustments;
• ease of customization.

• not detected.

Conclusion

Before purchasing a product, it is necessary to collect as much information as possible regarding such equipment. In this way, the most common mistakes of buyers can be avoided. The same model may differ in cost based on vendor margins. It would be more correct to visit several online stores and compare prices. Also, it will not be superfluous to get experienced advice from a specialist and study the instructions for installing the relay before purchasing. This will help you understand whether self-installation of the structure is possible at home.

The water pressure switch is used by most owners of private houses to improve the autonomous water supply system. It is used to ensure uninterrupted water supply and normal functioning of the water supply. When choosing a model, it is necessary to build on not only financial capabilities, but also needs. A correctly selected relay is only half the battle, since it still needs to be installed correctly.