Q41WC series hard seal pneumatic ball valve uses integral valve seat instead of free valve seat. The integral valve seat can provide a stable platform on which the valve ball bears high pressure to prevent solid blockage between the valve ball and the valve seat. When the valve ball is in the open state, the valve seat is free from the harm of medium. The integral valve seat also eliminates the possibility of leakage between the free valve seat and the valve body.

How long is the service life of stainless steel bellows
The operating life of stainless steel bellows is usually long, about 5-7 years, but many people will ask, is there any way to improve the operating life of stainless steel bellows, so that its operating time is longer?
Through the analysis of stainless steel bellows, the factors affecting the operating life of stainless steel bellows mainly lie in the correct installation of stainless steel bellows, control of the working environment, manufacturing process, etc.
1. Correct selection and installation of stainless steel bellows: proper installation is directly related to the operating life of bellows. There are many products on the market, so it is necessary to ensure that the same bellows is operated, instead of mixing them at will.
2. Operating environment: try to avoid prolonged exposure. Long time direct exposure may lead to deformation of bellows, thus affecting service life.
3. Operation skills: Overload operation is not allowed. The greater the load, the shorter the operating life of the bellows. The bellows shall be operated within the allowable scale and shall not exceed.
4. Learn to look: look at the process, select high-quality bellows, and check whether there is damage when purchasing.
General operating life of stainless steel bellows! First of all, we must know that bellows are considered to be factors in three aspects of design compression strength, invariance and fatigue function. Of course, the calculation and evaluation of national scale and American EJMA scale have been defined, but from years of practical application and failure analysis of stainless steel bellows, it is found that the invariance of the calculation and evaluation methods given in the scale is not comprehensive, and the fatigue life is only a fairly thick line fan.
In addition, sometimes it does not eliminate the product of a completely suitable scale, and some problems will appear in the actual operation. Type such as the displacement before the end, the national compensation contact stainless steel bellows. During the pressure test, it is easy for the out of plane non changeability of the large diameter locking type to completely compensate the contact displacement. The bellows in the working position is easy to have circumferential non changeability, the small diameter double rod type full compensation, and the hinge joint compensation joint displacement conditions are easy to be non changeability. The large deformation of stainless steel bellows will not only affect the stability, but also provide favorable environmental conditions for stress corrosion.
Stainless steel bellows compensators are widely used in many industries. In addition to excellent compensation ability, the main reason for high reliability is high. Its reliability is through design, manufacturing, installation, operation and management, and other links, to ensure that the decline of control compensators in any link will lead to life or even failure. Bellows are considered as three factors in the design of compressive strength, invariance and fatigue function. Of course, the calculation and evaluation of national scale and American EJMA scale have been defined, but from years of practical application and bellows failure analysis, it is found that the calculation and evaluation methods given in the scale are not comprehensive, and the fatigue life only gives a relatively rough gap (the average fatigue life is 103~105). Sometimes a product that is completely suitable for the required scale will also present some problems in actual operation.
The large deformation of stainless steel bellows will not only affect the stability, but also provide favorable environmental conditions for stress corrosion. The comprehensive stress compensation amount of the bellows fatigue life of the bellows compensator depends on its fatigue life. The higher the fatigue life, the smaller the single wave offset of the metal bellows. In order to reduce the cost and improve the single wave compensation, some manufacturers consider that the allowable fatigue life of the bellows compensator is too low, which will lead to large bending stress of the meridian caused by the displacement of the bellows, high comprehensive stress, which greatly reduces the invariance of the bellows compensator and reduces the operation time of stainless steel bellows.