After inspection and repair, the keel pneumatic butterfly valve shall be tested for working performance on a special test bench. When the resistance frequency is 100 ± 1mm, the resistance of its stretching stroke and compression stroke shall meet the requirements
The larger resistance is 392~588N; The larger resistance of stretching stroke is 2450~3038N, and the larger resistance of compression stroke is 490~686N
If there is no test condition, we can also adopt an empirical approach, that is, use an iron bar to penetrate into the lower lifting ring of the keel pneumatic butterfly valve, step on its two ends with both feet, hold the upper lifting ring with both hands and pull it back and forth for 2 to 4 times. When pulling upward, the resistance is great, and when pressing downward, it does not feel laborious, and the resistance of stretching is restored compared with that before repair, without any sense of empty travel, It shows that the keel pneumatic butterfly valve is basically normal. The wholesale water chiller shock absorber - cast iron platform pneumatic butterfly valve - flat gauge pneumatic butterfly valve manufacturer damping ball valve for seat type water chiller pneumatic butterfly valve industry news gold medal product - ZTE series spring pneumatic butterfly valve. The special ball valve has compound vibration and noise reduction, low natural frequency, good vibration isolation effect, and sound transmission to isolated solids, Especially, it is superior to solid sound transmission for isolating high-frequency impact
It is a positive and negative vibration isolation product
High frequency impact solid sound transmission is superior
It is a positive and negative vibration isolation product
Spring pneumatic butterfly valve is a new generation of novel and practical product of our factory