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2022

How to choose high quality temperature control valve

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With the reform of the heating system, household heat metering and room temperature control have begun to enter the implementation stage. It is very common to install temperature control valves on radiators. Using temperature control valves to achieve room temperature control can not only maximize the Saving energy and meeting the needs of different users for indoor temperature regulation to the greatest extent is a good thing for the country and the people, but how to choose a temperature control valve is not fully grasped by users. If you cannot choose the product correctly, not only can you not To meet the needs, and may bring unnecessary economic losses to users, here are some options for small theft doors.

The temperature control valve refers to a device for temperature regulation (actually flow regulation) installed on the radiator water supply pipe. It is divided into two types: manual temperature control valve and automatic temperature control valve. Automatic temperature control valve is also called self-operated temperature control valve or automatic temperature control valve, and is also referred to as thermostatic valve.

The automatic temperature control valve is composed of a self-operated actuator of a temperature sensor and a special matching temperature control valve body. There are two most common two-way valves in the structure of the temperature control valve body. Two-way valves are mainly used in two-pipe systems or new specially designed single-pipe systems.

In recent years, according to the difference between single-pipe and double-pipe systems, three-way temperature control valves specially suitable for single-pipe systems and special four-way valves suitable for single-pipe and double-pipe systems are researched and produced. These four-way valves are currently more common in imported products, such as the four-way valve of GIACOMI-NI, which is not only suitable for various radiators, but also suitable for single and double pipe systems. Concealed connection of various pipes.

There are usually two types of temperature control valves: manual and automatic, and their valve action principles are very different. The manual temperature control valve usually adopts the screw lift valve core, and the rotation of the handle becomes the linear displacement of the valve core through the screw. In order to adapt to the unique linear movement mode of the self-acting actuator of the temperature control sensor, the movement of the valve core is usually directly designed as a linear displacement that can automatically reset, so the two valve bodies are generally not interchangeable.

However, there are also interchangeable specially designed valve bodies that can be used universally, that is, the valve body of the automatic temperature control valve is added with a suitable manual screw lifting mechanism, which can realize the universal interchange of manual and automatic. This improvement is particularly suitable for China's national conditions and has great practical value. In many current projects, in order to save the initial investment of developers, a valve body with automatic temperature control function and a special screw lift handle are installed first, so that both The manual temperature control valve is realized with 1/3 of the cost of the automatic temperature control valve (the price is basically equivalent to the manual temperature control valve), which leaves room for users to upgrade and replace the automatic temperature control in the future.
This kind of product is rare even in imported products. Italian Jiecomini is in the forefront of the market in this regard, providing a kind of double adjustment between manual and automatic temperature control valves. Temperature control valve, eight gear settings, the indoor temperature can be set with you, which is extremely convenient. It is worthy of being the world's largest supplier of HVAC valves. Because of the particularity of the valve between manual and automatic temperature control valves, the choice will be a little more complicated, and this complexity has caused some inexperienced personnel and speculative salesmen to "mixed eyes".

In the current market, there are many automatic temperature control valve suppliers who recommend to users that the pure automatic temperature control valve body with a simple adjustment handle is used as a double adjustment function temperature control valve, and some users have adopted this This is not very appropriate, and there are great hidden dangers. Although the valve body of such an automatic temperature control valve is attached with a simple adjustment handle, the design idea of the handle is to meet the needs of the automatic temperature control valve. Before the valve head is installed, it is temporarily used for system adjustment to meet the engineering pressure test and water test. After the pressure test and water test process is completed, it is replaced by the automatic temperature control valve head. Due to its temporary nature, this simple adjustment is required. The handle borrows the original common thread on the valve body for fixing the temperature control valve head for screw lifting.

We all know that the simple adjustment handle is generally made of plastic because of its temporary and disposable nature. If it is used as the final frequent adjustment, the thread wear will be very fast. Lifting is carried out under a certain pressure. Even in a system without pressure, the spring pressure of the valve core itself will greatly accelerate the wear of the handle thread, so use this product as an automatic temperature control valve. The manual thermostatic valve is inappropriate. Italian Jiecomini's temperature control valve can be upgraded to an automatic temperature control valve called double adjustment. The biggest difference from other brands is that its adjustment handle is not a temporary one-time product, but a specially designed durable. The final product of the application, the thread profile of the screw lift is a special trapezoid with force and wear resistance, and the pitch reaches 4.5mm.

There is no worries for long-term use, and of course, there is no problem for temporary use. The thread borrowed by the general temporary adjustment handle is a fine-tooth fixed thread, the thread shape is an ordinary triangle, and the thread pitch is only 1.5mm. This kind of temporary handle turns the displacement of the valve core for three turns to be equivalent to one turn of the 4.5mm pitch trapezoidal thread, which means that it takes three times as long as you open the valve from the minimum to the maximum. The inconvenience of valve adjustment is also obvious.