- pneumatic butterfly valve Sealing surface repair method

pneumatic valve sealing surface in the use of medium corrosion, erosion and under the action of mechanical load, will produce a different degree of wear and defects, and when the influence on the performance of the pneumatic valve sealing, of the sealing surface need to be repaired. To make the sealing surface to restore the original size, accuracy and performance. Mechanical seal face often repairing is produced by the scratch, collision, indentation, erosion and corrosion wear defects. When the defect depth over. Sealing surface machining is the hard part is the spherical sealing surface and wedge seal face. Ao brake stuffy sealing surface processing, can be used with the corresponding Angle fixture on the lathe, with mechanical seal face before repairing should pay attention to the following: (item and a half ） Or product structure according to the drawing requirements, should make clear the shape of the sealing surface parts location tolerance, precision and size requirements. ( ） The structure of sealing surface parts dimension accurately measured, due and certain machining allowance, can't because of the sealing surface of parts after repair processing size change which affect the sealing and the use of parts. ( ） Must be strictly positive sealing surface radiance before repair, in order to ensure the accuracy of the original seal position tolerances, and size requirements. Such as: pneumatic wedge gate valve and its opening and closing a wedge Angle tolerance; Pneumatic ball valve of the spherical surface of tolerance and the out of roundness requirements, the structure of the pneumatic valve pneumatic disc spring security and dimensional tolerance; Streamlined throttle regulating pneumatic valve surface size tolerance, etc. 。 Adhesive riveting repair in the repair of seal face, often on sealing have deep pits and surfacing welding porosity. Can use adhesive riveting repair technology, this method is suitable for copper alloy, babbitt and so on material soft sealing surface repair. 。 Argon arc welding, oxygen acetylene gas welding, etc. Notice requirements are as follows: (before the repair welding sealing surface ） Use of welding rod, welding wire and welding filler material should be the same as the seal face material or phase approximation. ( ） The welding performance of sealing surface materials and welding material and welding operation to understand in detail, in order to make reasonable welding repair process. ( ） For welding repair operation welder should undertake the corresponding welding training and should skillfully master the welding performance of welding material and welding repair process. ( ） For the defect of sealing surface should be clean, especially for the defect of crack, crack must be clean, and make welding groove. ( ） When the welding repair process need preheat into heat preservation after welding, to defend the other precision parts beyond repair parts, available antioxidant coating protected area. Carbon steel material under ℃, heating process can not protect within h. To restore the wear size, improve the surface quality and corrosion resistance. Electroplating technology in strict accordance with the specification for protective screen and insulation processing, sharp edge acute Angle to rounding. Coating and the sealing surface in order to ensure the good combination of strength, with the organic solvents such as acetone before plating will be carefully cleaning the sealing surface, and then to weak acid corrosion, finally the plating. More than chrome plating layer thickness. Mm, to heat treatment, plating workpiece in ~ ℃ mineral oil or air, time is ~ h, in order to improve the toughness and bonding degree of coating. By chromium layer after heat treatment, polishing chromium plating layer, to the original processing precision. Brush plating is a kind of not plating tank contact plating method, it has simple equipment, easy to use, easy to operate, save electricity materials, good quality and low pollution, etc, is suitable for sealing surface coating repair of pneumatic valves and other parts.
YAZE( Pneumatic company's main products: pneumatic pneumatic valve pneumatic ball valve pneumatic butterfly valve pneumatic actuator