3. When the car drives slowly and brakes urgently, if the car vibrates violently, it indicates that the JA type damping ball valve pneumatic butterfly valve is faulty
4. Dismantle the JA type damping ball valve pneumatic butterfly valve, erect it, clamp the lower connecting ring on the bench clamp, and pull and press the damping rod several times. At this time, there should be stable resistance. The resistance of pulling up (restoring) should be greater than the resistance of pressing down. If the resistance is unstable or no resistance, it may be due to the lack of oil inside the pneumatic butterfly valve or the damage of valve parts, Repair or replace parts>Dongfeng environmental protection tenet: adhere to the principle of "product quality is assured and service reputation is satisfied", continue to devote to pneumatic butterfly valve with new mechanism and new starting point, strive to improve their own quality, enhance market competitiveness, and remain invincible in the pneumatic butterfly valve industry