Low temperature pneumatic ball valve: DQ41F, DQ41H, DQ41Y;

The performance of pneumatic butterfly valve depends on the quality of mesh sleeve for pneumatic butterfly valve
The pneumatic butterfly valve is the main pressure bearing part of the hose device in the pressure pipeline, and also acts as a sheath for the bellows. According to the pressure in the pipeline and the application site, one or more layers of stainless steel wires or steel strips can be selected to stop weaving. The pressure range of Shuguang brand hose is generally PN0.6 - 32.0Mpa. Up to 42.0MPa. Since the main parts of the hose are made of austenitic stainless steel, the excellent temperature resistance and corrosion resistance of the hose are guaranteed. The operating temperature range of the hose is extremely wide, ranging from - 196 to 600 degrees. The applicable stainless steel brand number of the applied hose is selected according to the corrosivity of the medium through the pipe, which can ensure the corrosion resistance of the hose.
As the technology of pneumatic butterfly valve matures and develops from time to time, its ways can be described as diverse. How do people judge the performance of pneumatic butterfly valve in daily life? At present, the steel wire mesh covers consumed are mostly 24 strand, 36 strand, 48 strand, 64 strand, corrugated pipe with extra large diameter, 96 strand, 120 strand and 144 strand. In addition to the number of strands (wire), wire diameter, number of spindles (strip) and thickness, the main knitting parameters of the mesh cover also include cover area, knitting distance, knitting angle, etc.
Ordinary pneumatic butterfly valve only uses one layer of mesh sleeve; In special application places, there are also two or three layers of braiding, which are usually made of wire with a diameter of 0.3~0.8mm or tape with a thickness of 0.2~0.5mm, depending on the size of the corrugated pipe diameter and application requirements. There are 4-15 wires per share and one strip per ingot. Usually, when people choose pneumatic butterfly valves, they mainly depend on the size of the mesh to determine the performance of the mesh. Therefore, in conclusion, the important basis for determining the performance of pneumatic butterfly valve is the net sleeve.
The pneumatic butterfly valve can be tightened or stretched, but if it is not installed in the correct position, it will break quickly, reducing the service life.
When the pneumatic butterfly valve is installed, the hose should be in the middle position, which is called the device length. Under the device state at this position, when the hose is subjected to axial load, it can move in two directions. Otherwise, if it can only move in one direction, it will affect the strength of the pneumatic butterfly valve and reduce its service life.
The pneumatic butterfly valve can be installed vertically or obliquely. The most ideal state is the vertical device. At the same time, the device should be prevented from being near the left of the wheel. If necessary, a baffle can be installed.
The corrugated pneumatic butterfly valve has many characteristics, such as good flexibility, fatigue resistance, high pressure resistance, temperature resistance, corrosion resistance, etc. Its service life is much longer than other hoses (rubber and plastic hoses), so it has higher comprehensive economic benefits. With the development of modern industry, the demand for corrugated pneumatic butterfly valves that can withstand high temperature and high pressure is growing. Scope of application of hoses: flexible walk pipes are required to avoid vibration, and pneumatic butterfly valve devices are applicable to steam, gas, air, heavy oil, petroleum, chemicals, etc
Pneumatic butterfly valve is a kind of high-quality flexible connecting pipe, which is formed by extremely thin wall, seamless or longitudinal seam through high-precision plastic deformation. It has many advantages such as good flexibility, fatigue resistance, temperature resistance, corrosion resistance, etc. It is widely used in petrochemical, iron and steel metallurgy, rubber, machinery, power and other industries.
The connection mode of pneumatic butterfly valve is introduced as follows: the joints of pneumatic butterfly valves with a diameter of less than 50 mm are mostly threaded when they accept higher working pressure. When the threads are tightened, the inner and outer taper surfaces of the two joints are closely matched to complete the sealing. The cone angle is usually 60 degrees, but it can also be 74 degrees. The structure has good sealing performance, but the concentricity of two butt pieces must be ensured during installation.
The pneumatic butterfly valve can be tightened or stretched, but if it is not installed in the correct position, it will break quickly, reducing the service life. The hose can be installed horizontally, vertically or diagonally. The most ideal state is to install vertically. At the same time, the device should be prevented from being near the left side of the wheel. If necessary, a baffle can be installed.
Generally, pneumatic butterfly valves can be divided into three lengths: the first is the tightening length, that is, the length when the hose is tightened to the limit position; The second is the length of the device, which is the length of the hose when it is in the middle of half of the maximum displacement; The third is the stretching length, which is the length when the hose is stretched to the maximum limit. When installing the hose, the stainless steel pneumatic butterfly valve shall be in the middle position, which is called the device length.
Under the device state at this position, the pneumatic butterfly valve can move in two directions when subjected to axial load, otherwise it can only move in one direction, which will affect the strength of the pneumatic butterfly valve and reduce its service life. And in the process of practicing the device, considering that using a ruler to measure the length of the hose according to the calculation results and then stopping the device may affect the consumption efficiency, some foreign consumers directly install the ruler on the hose, and cut off the ruler after the installation.