Magnesium oxide powder for electric heating rack with or without sealing

1. The medium and low temperature tube can be unsealed; 2. The place with moisture must be sealed. In addition, there will be silicone tubes, silicone sleeves, ceramic beads, plastic insulators and other components at the nozzle, mainly to increase the electrical clearance and creepage distance between the lead-out rod and the metal wall of the nozzle. Silicone rubber can play the role of filling and bonding.