Double adjustment tap - an important element that reduces

16-06-2018

Water supply

The double-adjustment crane of the KRDP is used in one-pipe systems with closing sections and is necessary in order to quickly and efficiently regulate the quantitative and qualitative characteristics of the coolant.

Simply put, using this node, you can increase or decrease the flow of fluid in the system, thereby raising or lowering the temperature of the radiators. Despite the undoubted usefulness, this type of device is unfamiliar to many buyers, so we will consider it in this article.

In the photo: externally, the cranes of this group are no different from ordinary, the whole difference lies in the design and principle of operation.

Key Product Features

Consider the most important criteria that must be met by the nodes of double adjustment:

Manufacturing material	According to GOST 17711-93, brass of high grades serves as a material for manufacturing. This material fits perfectly as it has the necessary strength and durability and effectively resists corrosion processes.
Performance indicators	Cranes are used in systems where water or steam acts as a working medium, they are not suitable for other substances. The working pressure in the system should not exceed 10 kgf / cm2
Temperature readings	The permissible ambient temperature is 150 degrees, which is enough to work in most existing communications. At the same time the equipment works without problems at ambient temperature up to 45 degrees
Nominal diameter	Most often there are three main options -?,? and 1 inch. Other sizes can be made only on special order, so their price will be several times higher.
Connection type	It is always made in the form of couplings, with the help of this option, the valve is securely fixed in the system, but it is important to foresee its location for device screw connections
Control method	The necessary adjustments are made using the handle, which can be in the form of a round valve or in the form of a lever, it all depends on the manufacturer and brand of product

Note! Some of the cranes are labeled, with which management becomes even easier. The main thing is to get acquainted with the information in the technical passport in order to know which valve position corresponds to each of the tags.

Labels are made under the valve, which has a small arrow

Important Product Information

Let us see what is the difference between the structures of the group in question and ordinary cranes, so that you understand the features of their functioning and understand the device. (See also the article How to choose a sink: features.)

Features of the device

The principle of the double-adjustment valve is that it can be used to adjust the system twice. Primary is carried out in the process of installation, and after the completion of work and the launch of the system, you can adjust the flow rate to the desired parameters.

Depending on the type of locking mechanism, two groups of products can be distinguished:

Cork cone cranes, in which the gate valve is made in the shape of a truncated cone. The principle of operation of the structure is very simple - there is a through hole in the gate through which liquid or vapor circulates in the open position, when the knob is turned, the cavity partially or cavity closes, and this is how the adjustment takes place. The classic version, which is popular with experts for simplicity and durability.

Cone taps are abbreviated to the KRDP and have a service life of at least 25 years.

The device of double adjustment valves with ball locking mechanism resembles ordinary valves of this type, inside the case there is a ball made of brass or stainless steel, in which there is a cavity through which the fluid circulates. Partial rotation of the valve reduces the capacity of the element, and turning it by 90 degrees completely blocks the flow. A more modern version, and many experts believe that it is the future.

Ball valves are designated by the KRDS and can be operated for more than three decades.

Note! All products of this group must have a certificate of quality and comply with GOST standards. Only in this case it is possible to guarantee their compliance with the declared characteristics.

Recommendations for operation and maintenance

The double-acting water-saving faucet functions correctly only with proper installation. In this case, any violations during installation entail the termination of the warranty, so if you are not sure of your own qualifications, it is better not to do the work with your own hands.

The instruction manual includes the following measures:

At least once a year, it is necessary to inspect the body of the product for damage and leaks, as it is collapsible, there are connections to the structures that may eventually begin to leak due to the loss of elasticity and initial properties of the gaskets. (See also the article Connecting heating radiators: features.)

The collapsible case, despite its complexity, is a great advantage, since thanks to it the product is maintainable

Once every five years it is necessary to remove the structure and disassemble it for cleaning and checking for damage and corrosion. This will prevent emergency situations and significantly extend the life of the crane itself.

The life span of double-adjustment cranes is 25 years or more, the warranty is at least 18 months. All faults that occurred during this period are eliminated at the expense of the manufacturer.

During disassembly, each of the elements is carefully inspected and, if necessary, replaced.

Conclusion

Whichever option you choose, be it a popular 11b25bk double cone valve with a cone valve or more modern versions with ball systems, they all have excellent performance characteristics and allow you to save on heating. The video in this article will cover some important aspects in more detail.