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Teach you how to choose low-cost high-quality temperature control valve
With the reform of the heating system, household heat metering and sub-room temperature control has begun to enter the implementation stage, the installation of temperature control valve on the radiator has been very common, with the temperature control valve sub-room temperature control, both to the maximum Energy conservation, but also to meet different users to maximize the indoor temperature control needs, is a good thing to benefit the country and the people, but how to choose the temperature control valve does not completely allow users to grasp, if you can not correctly select the product, not only can not Meet the needs, and may give users unnecessary economic losses, here to introduce you to some choice of theft door. Thermostatic valve refers to the radiator in the water supply pipe installed on the temperature adjustment (in fact, flow control) of a device. Divided into manual temperature control valve and automatic temperature control valve two, automatic temperature control valve, also known as self-temperature thermostatic valve or automatic thermostatic valve, also referred to as thermostatic valve. Automatic temperature control valve is a temperature sensor by the self-executing agencies and a special temperature control valve body composition. Temperature control valve body structure often straight through, angle valve two kinds of the most common two-way valve. Two-way valves are mainly used in double pipe systems or specially designed new single pipe systems. In recent years, according to the differences between single and double pipe systems, three-way temperature control valves specially designed for single pipe systems and special four-way valves fitted with dark and fitted single and double pipe systems have also been researched and produced. These four-way valves are now more common in imported products, such as GIACOMI-NI four-way valve, which not only applies to a variety of radiators, but also for single and double pipe systems, but also have to meet Concealed a variety of pipe connections. Thermostatic valves are usually manual, automatic two, the valve movement principle is very different. Manual temperature control valve usually adopts the spiral lift valve core, the screw handle of the handle becomes the linear displacement of the valve core through the spiral. The automatic temperature control valve in order to adapt to the temperature sensor self-executing agencies unique linear movement, the spool movement is usually designed to automatically reset the linear displacement, so the two bodies are not interchangeable under normal circumstances. But there are interchangeable specially designed valve body can be universal, that is, the valve body with automatic temperature control valve, plus a suitable manual screw lift mechanism, you can achieve manual, automatic common interchange of the two. This improvement is particularly suitable for China's national conditions, very practical value, in many current projects, in order to save the initial investment of developers, first installed a body with automatic temperature control function and comes with a special screw lifting handle, so that both Achieved with 1/3 of the automatic temperature control valve costs (the price is basically equivalent to the manual temperature control valve) to achieve a manual temperature control valve, but also to the user in the future to achieve automatic temperature control upgrade space left. This product even in the imported products are rare, Jiekemini Italy in this regard in front of the market, providing this between the manual, automatic thermostatic valve called a double adjustment Thermostatic valve, eight settings, the room temperature set with you, extremely convenient. Worthy of the world's largest HVAC valve supplier. Precisely because of the special nature of the valve between manual and automatic thermostatic valves, the choice is more complicated and this complexity creates opportunities for some of the less fortunate and the more opportunistic salespeople. In the current market, there are many automatic temperature control valve supplier's salesman will be equipped with a simple adjustment of the handle of the pure automatic temperature control valve as a dual-function thermostat valve to recommend to the user, and some users use this Of the thermostatic valve, which is not appropriate, there is a big hidden danger, although the automatic temperature control valve body attached to the simple adjustment handle, but the handle design idea is to meet the automatic temperature control valve Before the valve head is installed, the system is temporarily used for system adjustment to meet the engineering test pressure test water. After the test pressure test water process is completed, the valve head is replaced by an automatic temperature control valve head. Due to its temporary nature, the simple adjustment The handle borrowed from the original body for the fixed temperature control valve for ordinary screw thread for lifting. We all know that the simple adjustment handle because of its temporary, one-time, generally made of plastic, if the final frequent use as its adjustment, the wear of the thread is very fast, not to mention the normal heating system, the spool up and down The lifting is carried out under certain pressure. Even in the absence of pressure, the spring pressure of the valve core alone will greatly accelerate the thread wear of the handle, so the product can be upgraded to an automatic thermostatic valve Manual temperature control valve is not appropriate. Italy Jiekemini can be upgraded to automatic thermostatic valve thermostatic valve called the double adjustment, and other brands of the biggest difference is that the adjustment handle is not a temporary one-time product, but specifically designed with durability The final product to be used, the thread profile of the helical thread, is a special trapezoidal shape with a helical pitch of 4.5 mm. Long-term use is without any worries, of course, temporary use even more no problem. The general temporary adjustment of the borrowed thread for fine teeth fixed thread, the thread of the ordinary triangular tooth form, the pitch is only 1.5mm. This temporary handle rotation of three spool displacement in order to 4.5mm pitch with the trapezoidal thread circle, which means that you will be in the valve from the minimum open up to three times the maximum time, which often need to adjust the temperature control Valve inconvenience is also obvious. Below we will study the automatic thermostatic valve, automatic thermostatic valve is usually divided into two parts of the valve body and the valve head, the valve body generally used copper casting or hot forging production, the valve head temperature sensor generally have liquid and solid points: Solid is divided into two kinds: one is wax system, one is a thermal memory alloy. Currently on the market most popular solid sensor media for stone wax, very few thermal memory alloy. The following on the market are common body and valve head for a brief introduction, for the selection of automatic temperature control valve for reference. Temperature control valve body: Copper casting has the advantage of being capable of casting complex shaped products with less mold cost and lower production cost, but the disadvantage is that there are many casting defects and the material has poor compressive strength. In contrast, High value, forging equipment complex, high production costs, but it can get high-strength products, the pressure capacity is much higher than the castings, while effectively avoiding the casting defects. Therefore, the less complex shape of the body, the professional manufacturers are using hot forging production of the valve body. However, there are some manufacturers using the casting method of production, which requires careful user identification. I think the thermostatic valve used on the heating is a simple valve body, hot forging is very suitable. In choosing the valve body, there should be a detail should pay attention to the design of many of the valve body for easier, straight through the valve body inlet and outlet in the same axis, so the design is simple, but the spool displacement space will be Affect, so this type of valve body displacement generally only 2-3mm. Italy Jiekemini automatic temperature control valve body, the straight-through valve body design is very unique, to ensure that the inlet and outlet in the case of the same axis, the channel with a staggered displacement design, effectively increasing the spool displacement space, making Spool displacement up to 4-5mm, which in the recent design of automatic temperature control valve is rare. Increasing the displacement of the spool is more advantageous for the dirtier HVAC water. Too small displacement of the spool will easily cause blockage in the case of dirty warm water and serious scaling. Thermostatic valve head: Thermostatic valve head temperature sensor filled with medium generally have two kinds of liquid and solid, liquid and solid due to different production processes, the average manufacturer is usually limited by the production scale, often only use Of a process to produce liquid or solid valve head, only some large manufacturers will produce two kinds of valve head at the same time to facilitate customer choice. As for the difference between the two valve heads, I think in HVAC applications should be said that there is not much difference, if we must say something different, I think in the following areas: First, the volume is different. Liquid in general to achieve the same thermal expansion displacement requires a larger amount of liquid, so the temperature sensor larger, so the valve head larger, with a small body after the ratio of a little uncoordinated, it is better to use solid valve Some more beautiful head. Second, liquid sealing technology to be more complex, the cost of production relative to the solid to be slightly higher, so the sales price will tend to be higher. Third, the liquid valve head is more sensitive than the solid point, which is the only advantage of the liquid compared with the solid, but in the field of HVAC this typical large lag system, this advantage is not much effect. All in all, temperature-controlled valve heads, whether liquid or solid, meet the requirements of the EN 215 standard for sensitive times as long as they are qualified products. I have conducted a comparative measurement of the temperature sensors of two media in Jie Gemini, Italy, at the National Construction Engineering Quality Testing Center and found no notable differences. It is worth mentioning that Italy Jiekemini temperature control valve head installation is also very unique, the general temperature control valve head installation are threaded connection, but Jiekemini has adopted its own patented technology, fast card Pressure connection, fast and safe, effectively avoiding the manual screw connections easily loose defects. Jieke Minnie also has its own patent in the connection of the valve body, that is, PTFE self-sealing materials are hot on the joints, which facilitates the installation without the need of wrapping raw materials or hemp rope, thus effectively improving Installation efficiency, and effective sealing. In summary, when you want to use the thermostat valve carefully selected, so you can make the best choice with the least amount of money, whether it is using manual, dual regulation or automatic temperature control valve, Italy Jiekemini Can be described as the perfect partner to choose from, complete product, good service, so that you can be satisfied. In general, if the investment for the most provinces as a principle of choice, without considering the benefits of energy-saving thermostatic valve does not consider the future upgrade to automatic thermostatic valve, you can choose purely manual temperature control valve. If you use a small amount of investment, taking into account the future owner by the owner to upgrade to automatic thermostatic valve, then choose dual thermostat valve, this dual thermostat valve and manual thermostatic valve price is basically the same. If you want to make one-step choice, then you can directly select the automatic temperature control valve, the price is roughly three times the manual temperature control valve.