Rating of the best pressure switches for a pump for 2022

Decentralized or autonomous water supply systems are installed strictly according to the schemes. They provide a list of requirements and calculations that are mandatory. However, to ensure the reliability and efficiency of the water supply, just installing a quality source and laying pipes 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 most budgetary solution is to buy a pressure switch that can be turned on and off as needed. A compact and thoughtful device is responsible for maintaining the pressure inside the structure, making the pressure 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, the preference for more advanced block-type automation, which includes a variety of sensors, should be noted.

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 switches on automatically. At the moment when the maximum coefficient (set by the user) is reached, the pumping unit will turn off, as the contacts will open. The design is equipped with special adjustment 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 may have auxiliary connectors (instead of the usual terminals) necessary for connection, a soft start key and an operation indicator.

Operating parameters

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

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

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

There are such types of structures:

1. manager. The signal is sent to the power control unit.
2. Power. Power contacts are connected to the pumping unit.

Before buying, you must check the allowable switching power of the structure.

Characteristics and pressure setting

This equipment is small in size, which includes a fitting, with the help of which the subsequent connection to the pipeline network is carried out by means of a terminal group. These components will be needed 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 registering 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 work. A significant difference in pressure coefficients is also allowed. The increase in the coefficient occurs by clamping the spring. You should pay attention to the fact that in domestic conditions, factory settings are used that are fully consistent with the tasks. Used in popular models and hydraulic accumulators. Even if there are optimal standards, in some cases personal intervention of the user and manual adjustments may be required.

How to regulate

Numbering	Sequence of operations/adjustments
1.	Conventional models are equipped with several springs, the diameter of which varies.
2.	A large-sized spring is used to control the coefficients.
3.	A small spring detects the current level difference.
4.	In the process of compressing a large spring, there will be an increase in the maximum and minimum rates at the same time.
5.	In the process of compressing a small spring, the superiority of the maximum coefficient will become more obvious. Thus, the indicator of the maximum will become predominant.

DIY installation

The pressure switch, according to buyers, is best installed directly at the outlet (on the accumulator). In this section, there is a significant leveling of the turbulence of flows and pressure surges during the normal operation of the pump and when it is started. 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 popular models function normally at temperatures of +4 ° and above, as well as humidity of 65% or less. Such equipment must be installed in well-heated rooms. Before installing pumping equipment control sensors, you should install the following elements yourself (most of them are mounted at the construction stage):

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

Novelties 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 pump unit. Units that have appropriate protection against water can be mounted in a well, 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 optimal coefficient of humidity and temperature for the operation of the structure, which has a huge impact on the device, its service life and performance.

What you should pay attention to when buying a product in an online store

1. Before starting the installation of the unit, it is necessary to 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 wrong.
2. Preference should be given to the rating of quality manufacturers. Counterfeits adversely affect the operation of the system, which can lead to an emergency and breakage of individual elements.

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

3. Household kits showed themselves better in conditions of regular use. In this case, the maximum coefficient should not exceed 4 atm. Operating range - 1.4-2.8 atm, for plumbing.

How much is the kit

When choosing high-quality electrical equipment, it is necessary to focus on several criteria simultaneously. An important aspect is considered to be the cost. In construction markets, the offered products will cost the 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 save a lot and spend as much time on choosing a product as you need.

Which company is better to buy

The principle of the devices below has no visible differences. The simplest algorithm for their functioning is used:

• the relay connects to the pumping system at the moment when the coefficient in it reaches a critical level;
• when the maximum indicator is reached inside the system, 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 characteristics and scheme provided, it can be concluded that they differ. The advantages include the price of the kit.This value also has a dark side. 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 clear.

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

Based on numerous reviews, we can conclude that the cost of designs, as well as product recognition, is based on brand popularity. Products of a domestic manufacturer similar in characteristics are in no way inferior to foreign ones, moreover, their average price is much lower.

Italtecnica

Production from the Italian concern. It is this set that is better to buy for a private house. Along with pumping equipment, a modification called -PM / 5 is used. Conquers the markets due to high indicators of 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, then the equipment 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;
• the 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 you to connect a pressure gauge;
• ease of repair;
• have universal settings, in comparison with similar devices;
• through rotation, adjustment is carried out;
• the main element is bipolar (both zero and phase open at the same time).

• overpriced.

Unipamp

Domestic manufacturer whose products are oriented to the European market. In addition to an acceptable cost, they are characterized by the release of high-quality products. A high rating was acquired largely due to various modifications.

• connection is only ¼ inch;
• manometer included;
• works in combination with pumps with a power of 1.5 kW or less.

• marriage is common.

Danfoss

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

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

Popular relay models

Among the numerous components of 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 are advised to purchase 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 possibility of self-adjustment. It should be noted that both models belong to the category of low-voltage products, so it is not advisable to connect the units to a 220 V network. For ease of use, it is recommended to use a special control panel. Also, such a purchase is far from affordable for every family.

Often the buyer makes a choice in favor of a cheap and affordable unit. For example, a 4 atm device will cost 4,000 rubles, while its 8 atm counterpart will cost 6,000 rubles.

Inexpensive models also have a limit of 5-8 atm. An example is the designs MDR 5-8 and MDR 5-5. The upper limit indicator is 8 and 5 atm, respectively. The first acquisition will cost 2.9 thousand rubles, while the second one will cost 2.1 thousand rubles. Both devices are mounted on a membrane tank. It is allowed to connect to a network of 220 V, 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 ratings are high. Also characterized by an excellent degree of reliability.

Budget designs. These include PM-5 from the Italian concern. He copes with the tasks set by 100%. It is worth noting that the average price for a similar product is several times less than that stated by Grundfos. The price of the device is 400 rubles. Works great in combination 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 network of 220 V. However, during the connection process, you may encounter some difficulties.It is not possible to connect to a 320 V network.

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 lies in the operational period. 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 big expenses are not planned, but it is necessary to establish uninterrupted water supply, then you should pay attention to the average 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, it should be noted excellent functionality at an affordable cost. Due to this, they are in high demand among modern consumers.

Best Cheap Relay Models

Italtecnica PM/5-G

Relay made in Italy. Optimal make-up is carried out from a network of 220 V. 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. ¼ threaded fitting included. Permissible power indicator - 15.4 thousand watts.

Price - 700 rubles.

• acceptable price;
• manual adjustment;
• assembly.

• not detected.

Aquario PS-5/2

Italian assembly from a famous brand. It is powered by 220 V. In this case, the operating pressure coefficient will be 10 bar.Factory settings are standardized: off - 2.8 bar, on 1.4 bar or less. Manual adjustment allows and allows you to work in the range of 1-5 bar. Declared protection class IP54. Operates in systems with cold water, while the temperature of the working medium should not exceed 40 ° C.

Cost - 650 rubles.

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

• there are fakes.

Gilex RDM-5

An excellent model from a domestic manufacturer. Power supply from the mains is carried out from 220 V. The declared protection class is IP44, which allows installation in rooms with a high level of humidity. It becomes possible to install auxiliary pumps, whose power will not exceed 1100 watts. The water temperature in the system must not exceed 35°C.

Price - 600 rubles.

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

• marriage often comes across;
• the declared protection class will not save the case from early 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. The ¼ thread 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 by a 220 V mains supply. The manufacturer designates the IP44 protection class. This allows installation in rooms with a high level of humidity. Also, the case is protected from getting small litter inside the product.

The price for the set is 550 rubles.

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

• the dimensions of the connecting pipe may not be sufficient for comfortable installation.

Unipamp LP-3

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

Price - 500 rubles.

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

• operational period.

Rating of the best expensive relays

Pressure switches for water - a huge variety, and sometimes making a choice is not at all easy. The category of expensive devices includes electronic mechanisms. Their main advantage can be called ease of use, including making settings. Due to this, they are characterized by the presence of high accuracy of operations.

However, it should be noted that for private houses (domestic needs), this indicator cannot be called a key one. The accuracy of the operation does not play a role in the correctness of the operation.

For domestic water supply systems, expensive devices may simply not be suitable.This is due to the increased sensitivity of the sensors. As a result, higher voltage is required. If the choice was made in favor of such devices, you will need to purchase auxiliary and no less expensive equipment that would allow you to maintain a certain indicator on 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 rightly 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 more than 10 quality certificates and diplomas, which testify to the high reliability and efficiency of the products. The setting range allows you to work with indicators in the range of 0.2-28 bar. Drops can also be adjusted. It is intended for work with gaseous and liquid environments. Able to withstand significant loads. On request, the manufacturer can equip the device with gold-plated contacts.

Price - 6100 rubles.

• ability to work under high loads;
• 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 for operation with a working pressure of 4 bar. The connecting branch pipe has a carving in 3/8 inches.Compared with various Chinese appliances of the same type, this equipment is no match. The power of the equipment, the quality of the assembly and the materials used are quite high. At the same time, the ease of use of the purchased equipment should be noted.

Price - 6000 rubles.

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

• price.

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 load capacity of 5500 watts. In fact, the pumps have sufficient power and are powered by a 220 V network. The designated protection class is IP54. Can be installed on a hot water line with a working pressure of 5 bar. The coolant must not exceed 80°C.

Cost - 4700 rubles.

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

• significant price.

Whirlwind ARD-1

A product of Russian production, the assembly of which is carried out in China. The functionality of the unit meets all the needs of the modern consumer. Irrigation mode. In the presence of the function of protection against frequent inclusions, system breaks and leaks. If necessary, the system will automatically restart, which will allow you to receive data regarding the water level. There is also protection against idle (dry) running. It is powered by 220 V. The maximum load indicator is 1500 W. Equipped with IP65 protection.

Price - 3550 rubles.

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

• not detected.

Aquacontrol RDS-M 1-2

Domestic product. This electronic equipment has a fairly extensive functionality. Leak protection available. It is possible to automatically restart the system. Dry running protection delay - 0.5 minutes. Make-up from a network of 220 V. In this case, the temperature of the liquid should not exceed 40 ° C. For connection, a 1.5 cm branch pipe is used. Power indicator - 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
Shutdown	0-6.5 bar
Inclusion	0-6 bar

The changes made can be observed using the arrow, which is available on the pressure gauge scale provided by the manufacturer.

The price for the set is 3000 rubles.

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

• 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 the margin of suppliers. It would be better to visit several online stores and compare prices. It is also not superfluous to get experienced advice from a specialist and study the instructions for installing the relay before buying. This will help to understand whether it is possible to independently install the structure 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 water supply. When choosing a model, it is necessary to build on not only financial capabilities, but also needs. Choosing the right relay is only half the battle, as it still needs to be installed correctly.