1. Preparation before installation of pneumatic ball valve
(1) The front and rear pipelines of the pneumatic ball valve are ready. The front and rear pipes shall be coaxial, and the sealing surfaces of the two flanges shall be parallel. The pipeline shall be able to bear the weight of pneumatic ball valve, otherwise the pipeline r must be equipped with proper support.
(2) Purge the pipelines in front of and behind the valve to remove the oil stain, welding slag and all other impurities in the pipeline.
(3) Check the mark of the pneumatic ball valve and make sure that the ball valve is intact. Calculate the opening and closing times of the valve barrier and verify that it works normally.
(4) Remove the protective part on the connecting flange at one end of the left pneumatic ball valve.
(5) Check the valve hole, remove the possible dirt, and then clean the hole. Even if there are only small particles between the valve seat and the ball, the sealing surface of the valve may be damaged.

How to identify and purchase excellent pneumatic butterfly valve joints
Since the internal materials of pneumatic butterfly valve joints on the market are different, and the quality is mixed, it is difficult for customers to distinguish the quality of joints from the appearance. What exactly caused the cracking of the joint? What aspects should be paid attention to to prevent connector incidents? How to obtain evidence once the problem appears? How can we protect our own rights and interests?
Identification quality can be proved according to standards
It is understood that it is difficult to identify the root cause of joint cracking. At present, the National Bureau of Technology and Quality Supervision has issued the recommendation standards for sealing water nozzles and hose standards, which perfectly regulate the quality standards of connectors and hoses. Consumers can go to the quality inspection department to check the torque of the connector hose, the tightness of the connector spool, and the strength of the connector material. If the content of the standard rules is not met, it will be attributed to the quality problem, which can be used as a strong basis for appeal.
No negligence in operation and maintenance
The long-term use of pneumatic butterfly valve joints at home usually does not cause concern, but over frequent use and improper maintenance also lay hidden dangers for joint cracking on a certain level. It is understood that the service life of the joint is usually 200000 times, and the exchange should be stopped after long-term use. When using, close and open as gently as possible, and do not repeatedly rotate the hose connector knob.
It is difficult to distinguish the appearance of hose connector
According to the introduction of the quality inspection base of Jiangyan Xinxing Pipe Fittings Factory, many manufacturers are currently using selected cast iron (rusty), zinc alloy (non corrosive) and other materials to stop the production of pneumatic butterfly valve joints in order to seek profits and reduce costs, which causes problems in the quality of goods. It is understood that the strength function and sealing function of the pneumatic butterfly valve connector cannot meet the standard due to poor quality of the connector and hose, material, wall thickness and other problems, which should attract consumers' attention.