(4) The sealing of the valve stem is also more reliable, because the valve stem does not move up and down, but only moves as if it were rotating. Everyone is also worried about the packing of the valve stem, and the sealing will also increase with the rise of the medium pressure; 　　　　

Storage method of electric butterfly valve 1. When the electric butterfly valve is placed, ensure that the electric device is not squeezed and the terminal block is not damaged, and prevent contact with corrosive substances. 2. The product should be stored in a dry and ventilated room. The sealing ring should not be stored in the open air. It should not contact with oily substances to avoid aging. 3. Electric butterfly valves with a storage period of more than 18 months shall be retested before installation and use to ensure the integrity of structure and function. Storage and transportation a. The machined surfaces at both ends of the electric butterfly valve shall be cleaned of dirt and coated with anti rust agent. b. Both ends of the drift diameter shall be covered to prevent dust and rust and keep the channel clean.