Second inspection: package inspection of finished electric butterfly valve. The Buyer and the Seller must pack and leave the factory according to the requirements of the contract documents. The packaging must be reliable and firm. Generally, there must be no damage, bruise, scratch and other undesirable phenomena. In addition, each packing box shall be provided with a production label indicating the material, diameter, pressure, connection method, quantity, model and production date of the electric butterfly valve.

3. In the harsh places of the construction site, such as the waste water discharge of the construction site and industrial mine, the pipeline is easy to be blocked due to the many impurities and complex components in the sewage, so the electric pump will be overloaded and the motor will be vulnerable to heating. The pneumatic diaphragm pump can pass through the particles and the flow is adjustable. When the pipeline is blocked, it will automatically stop to be smooth.