After cleaning, it is necessary to wait for the volatilization of the cleaning agent on the washed wall surface (it can be wiped with a silk cloth not soaked in the cleaning agent) for assembly, but it shall not be put aside for a long time, otherwise it will rust and be polluted by dust.
New parts shall also be cleaned before assembly.
Lubricate with grease. The lubricating grease shall be compatible with the metal materials, rubber parts, plastic parts and working media of the ball valve. When the working medium is gas, for example, special 221 grease can be used. Apply a thin layer of grease on the surface of the seal mounting groove, a thin layer of grease on the rubber seal, and a thin layer of grease on the sealing surface and friction surface of the valve stem.
During assembly, it is not allowed to have metal chips, fibers, grease (except those specified for use), dust and other impurities, foreign matters, etc. contaminating, adhering to or staying on the surface of parts or entering the cavity.

How to distinguish the quality of pneumatic butterfly valve:
1. The price level is different. When customers want to buy pneumatic butterfly valves, they always want to ask more, which is comparable to the price level at the fingertips. However, after asking, they have a headache. The prices of the three companies are too high, and the prices are too low to see the first signs. Why is the contrast big if they don't connect? First of all, as for the basic parameters and materials of pneumatic butterfly valve, we should collect whether the corrugated pipe (several layers) and net sleeve (several layers) can be made of 304 stainless steel, and what the material is in the continuous style. The good guy section will be better if we confirm the specification and material and then merge the price. The price of pneumatic butterfly valves is only a part of the materials selected by users. 2. The origin of pneumatic butterfly valves is emerging in endlessly. The large contingent of people self declared that the more the origin of pneumatic butterfly valve manufacturers, the better. Users often hear about which one to choose. They think about the after-sales title and offer suggestions for users to choose a central place closer to themselves. 3. How to maintain the after-sales of pneumatic butterfly valves, which is really the key factor to see the strength of manufacturers, Good enterprises all have special after-sales personnel. This can only be discussed by the user himself. 4. Is it necessary to have practical insight into pneumatic butterfly valves? It is necessary to stop field investigation in Chenguang, where large quantities are reserved, so that long-term cooperation can be achieved later.
What are the characteristics of the data of pneumatic butterfly valve
Connectors at both ends of pneumatic butterfly valve: connectors mainly include threaded connection, flange connection and quick connector connection. Pneumatic butterfly valve has three major functions: reducing the device stress of the pipeline, compensating the displacement of the rated position of the pipeline, and absorbing the vibration of the pipeline system.
The stainless steel mesh sleeve is the main pressure bearing part of the metal braided hose device in the pressure pipeline, and also plays a maintenance role for the pneumatic butterfly valve. 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 be woven according to certain parameters to form a high-pressure pneumatic butterfly valve, The pressure range of the metal braided hose consumed by our company is generally PN0.6-32.0MPa, up to 42.0MPa. Stainless steel mesh cover mainly includes steel mesh cover and steel mesh cover.