Characteristics of spherical polypropylene cranes

The modern construction market is replete with a variety of different products, but some products stand out against the general background. In the field of water supply and heating communications, spherical polypropylene taps have become very popular. First of all, they have a high degree of strength. Also, these cranes have a number of other valuable advantages in comparison with analogues made of metallic materials. Let us consider in more detail their features and characteristics.

Polypropylene ball valves are used to block the flow of a substance in a pipeline.They can be included in the system of cold and hot water, as well as heating. The overlapping element has a spherical shape, which is why the structures got this name. This element often has a special hole.

The ball must be made of durable metals with anti-corrosion properties, since the device is often in contact with an aqueous medium. The basis of the product is the case. It is made from modern high-quality material - polypropylene. This allows you to permanently get rid of systematic maintenance, because the installation work in this case is performed in the same way as the joining of polypropylene pipes.

An additional part of the design is the lever. It is with its help that the position of the metal ball is regulated. So, for example, to open or, on the contrary, to stop the flow of fluid, the locking element rotates around its axis. To do this, set the temperature to about 90 degrees Celsius.

An example of such a crane can serve as a widespread model PPRC PN20. It can be used in the range from 0 to 95 degrees Celsius. The section has a distance of 20.63 millimeters. The main advantage of the product is that it has a rather long period of operation: 50 years for cold water and two times less for hot. The pressure indicator limit is 20 bar.

The ball radiator valve basically has only positive feedback and must be installed according to GOST. Change the threaded version is not difficult if its diameter is 25 mm, and its technical characteristics are at the proper level. When cleaning the product it is necessary to avoid the use of aggressive substances.

Polypropylene ball valves have both strengths and weaknesses.

Pluses of devices:

• high duration of operation (up to fifty years subject to the rules of use);
• compactness;
• low weight;
• aesthetically pleasing appearance;
• no rust formation (due to material);
• resistance to various chemical influences;
• simplicity and ease of installation and installation (it can be carried out independently in the presence of a welding machine);
• adequate cost.

Disadvantages of products:

• you can not control the power of movement of the transported working environment;
• the design is not disassembled, therefore it cannot be repaired (it must be replaced immediately).

There are many criteria for the classification of these devices. One of them is the appointment of cranes. They can be used:

• in the hot water supply system;
• in the cold water supply system;
• in the heating system.

Also, products can be divided according to the possibility of structural analysis. They can be of two types.

• Detachable (used in cases where they can be disconnected from the system). In this case, connectors are installed either on one side of the device, or on both at once.
• Collapsible. In this case, flare nuts are used, they provide quick and efficient installation of the equipment. Collapsible polypropylene cranes are of two subspecies: straight and angular. The latter have a significant difference from the first: they can be connected to pipes without couplings, which greatly simplifies the installation process.

Doo (in millimeters) / Length (in millimeters)

50 / 114,5

40 / 100

32 / 85

25 / 71

20 / 65,5

At the initial stage of production, the devices are marked: a blue mark means that the tap can be operated exclusively in the cold water supply systems. The valve can be of any color. It depends on the manufacturer.

Polypropylene ball valves are most often used in everyday life to transfer streams of hot or cold water. Compared to their brass counterparts, they have some differences. For example, in polypropylene cranes there are no elements for sealing from the inside on the rod, because they are located outside the range of the opening section.The handle can have one of two forms: a butterfly or a lever.

The ball has only two polymeric limiter rings. They provide stable preservation of the node in the correct position, have a reliable assembly, are particularly durable. Sometimes the balls themselves can be made of brass, not only stainless steel. In this case, they are protected from corrosion by applying a layer of chromium. Sometimes some manufacturing companies grind the ball from the bottom side to save metal. This has a bad effect on the operation process, since the product becomes subject to frequent clogging.

This process requires a careful approach that will save the buyer from unforeseen expenses for the replacement of equipment in the future. When buying, it is necessary to conduct a detailed inspection of the product for the presence of deformation and defects. It is also worth checking out how to turn the crank handle. If the products are of high quality, this action is accomplished with little effort. In addition, it is recommended to check that the internal cross section of the device is equal to the internal diameter of the communication, which will be the basis for the installation of the device.

Acquire the device is only in proven specialized stores, they contain the smallest percentage of defective and counterfeit goods. It is not worth saving on such products, otherwise in the future the expenditures may take on larger scales in the event of a breakdown.

Installation of the crane is a simple process. It is carried out in the same way as the installation of fittings made of polypropylene. However, for high-quality installation requires special welding equipment, which requires the use of appropriate experience and knowledge.

This type of work is carried out in several stages. Consider in more detail each of them.

• Preparatory stage. At this stage, the necessary equipment is being prepared for operation, the inclusion of a soldering tool and its heating to the required temperature. A special indicator signals that it is ready to work - it should turn green.
• Cleaning the edges of the pipes. This stage takes place only when using reinforced pipe. The edges should not contain burrs.They must be even, cleaned of dirt.

• Insert the tap and pipe into the nozzle. This process requires speed and clarity of movement, because it provides the strength of the connection.
• Warming up the tap and pipe. After completing the work of the previous stage, you need to wait for the time that the instruction defines. It is usually attached to the equipment.
• Connection details. After a certain amount of time, all parts fit together. It is necessary to carefully control this process, make sure that there are no displacements.
• Connect the other side of the crane. At the final stage it is necessary to do everything in the same order from the other side. If you do everything correctly, you get a strong locking knot.

Most consumer reviews confirm that the polypropylene ball valve has several undeniable advantages, including reliability and long service life.That is why such products are often used both in everyday life of ordinary citizens and in the work of large industrial enterprises. The only advice that professionals give is to carefully check the details before installation in order to identify a marriage.

In the next video, see the review of spherical polypropylene cranes Heisskraft.