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what is bevel gear?
The bevel gear is used to transmit the movement and power between the two intersecting shafts. In general machinery, the angle of intersection between the two shafts of the bevel gear is equal to 90° (but it may not be equal to 90°). Similar to cylindrical gears, bevel gears have indexing cones, addendum cones, tooth […]
what is Spur gear?
Spur gear is a classification of gears. According to the relative position and tooth direction of a pair of gear axes (whether the two circles are parallel), it can be divided into plane gear rotation and space gear rotation; according to the working conditions of the gears, it can be divided into open transmission and […]
Check valve model designation method
Check valve model representation method Check model preparation instructions Check valve (one-way valve) model compilation instructions: Check valve (one-way valve) is also called check valve or reverse flow valve. It is an automatic valve that opens or closes the disc through the flow of the medium itself, and can only flow in one direction and […]
Valve model establishment and meaning (2)
In the previous article, we have introduced the establishment of code number of the valve model in China. However, there are more and more types of valves and materials, and the compilation of valve models is becoming more and more complicated. Although China has a unified standard for valve model formulation, it is gradually unable […]
Description of lining material for rubber lining valve
Overview of rubber-lined valves: Rubber-lined valve (lined valve) is a valve suitable for pipelines containing corrosive media and high sealing requirements. Generally, the applicable temperature should not be too high, and it is not suitable for use in media containing particles to avoid scratches. Scratches or scratches the sealing surface, causing the valve to leak. […]
Conversion of valve nominal diameter and inch | comparison table
Valve nominal diameter|valve nominal diameter Definition of valve nominal diameter: Nominal diameter (or nominal diameter), also known as average outer diameter, refers to the size of all piping accessories in the piping system. The nominal diameter is a convenient round integer for reference. The nominal diameter of the valve is marked with a number followed […]
Comparison table of valve diameter (DN) and pipe diameter
The size of the valve caliber has an inevitable relationship with the size of the pipeline. It is usually said that the pipe diameter (outer diameter) is matched with the valve. The valve diameter needs to be calculated according to the actual parameters. Generally speaking, the pipeline will be larger, and the valve actually needs […]
Working principle diagram of swing check valve
Working principle diagram of swing check valve Swing check valve, also known as check (flow) valve, is an automatic valve used on one-way flow pipelines to prevent the medium from flowing back. It depends on the pressure of the pipeline medium to open or close the valve. It can be divided into single valve type […]
Working principle diagram of lift check valve
Lifting check valve structure: Lifting check valve is a kind of valve that prevents pipeline media from flowing back, mainly composed of valve body, valve seat, valve flap, valve cover and other related parts. The lift check valve is equipped with a spring to ensure that the disc is always in a dynamic equilibrium state […]
What is butt welding? (9)- New technology of flash butt welding
New technology of flash butt welding 1) Program-controlled reduced-voltage flash butt welding is characterized by the use of higher secondary no-load voltage at the beginning of the flash to facilitate the initiation of the flash. When the end surface temperature rises, the low-voltage flash is used and maintained The flash speed remains unchanged to improve […]