Pneumatic valve welding and the silver brazing methods

welding and silver brazing
keep in mind what is the purpose of the recommended by the pneumatic valve, and analyzes the application environment, so as to decide what kind of pneumatic valve is best suited for installation. Before installing the correct pneumatic valves, pneumatic valves in order to prevent damage, and to ensure that the working performance, give full play to the pneumatic valve, please read the installation guide.
. First cut tube along the vertical direction, and finishing, deburring, measure the diameter.
. Use cloth or steel wire brush to clean pipes and cutting parts, a bright metal surface. Recommended not to use steel wool.
. To outside of tube and inside of solder cup apply flux, the surface to be joined must be completely covered. Please use flux in moderation.
. Make sure that the pneumatic valve is fully open. Heat to tube first. As much as possible to transfer heat from the pipe pneumatic valve. Avoid prolonged aerodynamic heating of valve itself.
. Silver brazing method: assemble parts in need for soldering. If allowed to apply flux components in an upright position, the water in the flux will evaporate, and dried flux is easy to fall off, exposing metal surfaces to oxidation. Assemble joint by, want to insert the pipeline pipe sleeve until it is obstructed. Assembly is to ensure that a stable support, that during the brazing operation can keep in a straight line.
note: nominal size in inches or more of the pneumatic valve, one-time will connect components are heated to the required temperature is difficult. In order to maintain normal temperature on the large area, normally need two welding torch. Suggestions for the proper preheat tube set area. Suggestions of the connecting parts by acetylene flame heating. Pneumatic valve from the feet start heating pipe, and then a short alternating up and down around the pipe to pipe flame baking, and to the appropriate Angle rotating pipe, to avoid burning through the pipe. Flame to continuous movement, are not allowed to stay on one point.
in the pneumatic valve base of socket. Heat evenly, with the flame of pneumatic valves and piping baking process to continue to the flux on pneumatic valve sound. Avoid excessive heating of pneumatic valve.
when flux appears liquid and transparent on both tube and pneumatic valve, start sweeping flame back and forth along axis of joint, to maintain the connection parts, especially the pneumatic heat on parts to be toward base of valve socket.
. Use the right amount of solder: if you use a linear solder, so the nominal diameter for/inch pneumatic valve will use/inches of solder, and so on. If you use too much solder, so some solder may through the pipeline blocking part, and plug seal area. When installing a connecting parts, you can see the solder and brazing alloy continued flow
. Silver brazing method: apply brazing wire or rod at point of pneumatic valve
on the pipe socket in the door. When the welding rod or wire into the joint to fire away from them. Before and after, as alloy is drawn into joint to move flame. After the proper temperature is reached, alloy will flow readily into space between tube outer wall and the pneumatic valve socket. When joint is filled, a continuous rim of brazing alloy will see.
. When the solder is in a state of viscous, remove excess solder with the brush clean. Solder after cooling, a fillet around end of pneumatic valves as