Generally in the case of customers without special requirements, the connecting flange of the valve is cast together with the valve, which is called the integral flange, is also the most commonly used flange connection; Flat welded flange due to low structural strength, stiffness, more used in the conditions of moderate conditions, such as low pressure circulating water valve

Valve end connection structure and size is very important to the normal installation and use of the valve, if improper selection, easy to cause size or connection structure mismatch during the installation process, resulting in the valve can not be installed.

Valves are widely used in various fields of modern industry, but in some complex, harsh and even extreme environments and occasions, the traditional metal valves have been unable to break through the limit of its material, and can not adapt to the design requirements of special working conditions. Therefore, the introduction of engineering ceramics into the traditional valve industry is an inevitable choice. At present, engineering ceramics mainly include AL2O3 ceramics and ZrO2 ceramics.

The valve stem damage reason and how to prevent valve stem damage

To prevent valve leakage is an important work for valve engineers and valve users.FREE-VALVE analyse the valve leakage reason and make some advice on how to prevent valve leakage .

The advantage of the valve matching up pneumatic actuator is that the opening and closing speed is faster, especially when the torque is small, it can also be opened and closed within 0.5s.

Valve is the control part of industrial pipeline system , which plays an important role in pipeline system.  As an important component of pipeline, its sealing performance directly affects the valve use effect. 

FREE-VALVE company developed toughening ceramic materials, solve the” brittle” problem of common ceramics, greatly improve the impact toughness of the ceramic.At the same time, FREE-VALVE technical team overcome the combination problem of metal and ceramic material of valve parts , it successfully applied in the field of industrial valves, developed "wear-resisting valve". FREE-VALVE’s wear-resistance valve include ceramic lined gate valve ,ceramic lined butterfly valve ,ceramic ball valve etc .

How to select the valve correctly is the key to realize the sealing performance, strength performance, control performance, movement performance and flow performance of the valve.

There are many type of valve body materials ,suitable for a variety of different conditions. Maybe many kinds of valve body materials can meet the requirements of different working conditions,but the correct and reasonable selection of the valve material, can obtain the valve the most economic service life and the best valve performance.How to select the material of main valve parts ? First of all, the physical properties (temperature, pressure) and chemical properties (PH value and corrosion) of the working medium should be taken into account. At the same time the cleanliness of the medium should also to be considered (there are no solid particles or not ,different phase). In addition, different countries or district have different valve standard requirements ,valve material selecting

Pneumatic dome valves used to be used as feed valves are widely used in the ash handling system in the coal power plant .Do you know their operating principle ?

According to the structure of valve stem,  gate valve can be divided into Rising Stem Gate Valve and Non-rising Stem Gate Valve,the main difference between Rising Stem Gate Valve and Non-Rising Stem Gate Valve.

Pneumatic actuators using state often corresponding changes because of the change of the actual working condition, such as accessories in aging, parts aging and original valve replacement , gas supply system failures, etc.,

Sometimes, certificate of origin is goods export documents , the customer usually have related requirements to the documents, Different certificates of origin can enjoy different import tax rates to customers, such as one importer is from Vietnam, he can purchase goods from different countries , why did he choose China? One reason is China-ASEAN free trade agreement, and the certificate of origin is that he can enjoy the documents of preferential policies.For example FORM E:

The floating ball valve is simple in structure, small in size and has good sealing, but the ball of the floating ball valve is floating, Under the medium pressure, the ball can produce certain displacement and press on the seat at the outlet end to ensure the seal of outlet port

China and Pakistan signed the China-Pakistan Free Trade Agreement, China exports to Pakistan as long as the products accord with the "China-Pakistan Free Trade Agreement rules of origin", exporters can apply for the CERTIFICATE OF ORIGIN CHINA- PAKISTAN FTA (that is, certificate of origin China-Pakistan FTA (FORM P)

Pneumatic dome valves used to be used as feed valves for warehouse pumps in the dry ash delivery system at coal fired power plants.

Butterfly valves are not only widely used in petroleum, gas, chemical and water treatment, but also in the circulating water system of power plants.Wafer and flange are two types of connecting.Flange butterfly valve body has flange on both ends, connected to pipe flange.

Angle globe valve opening height calculation During the globe valve designing and application，is the opening height of the valve related to which parameters？The ...

Tank bottom angle valves are divided into disc opening into the valve and disc opening into the tank . Sometimes ,they are also called open-down type and open-up type .