Vacuum PinTubes

Glass Hi-Tech's evacuated pin tubes feature a thin (0.5 mm) wall bulb section which melts on contact with molten metal.  The molten metal then enters the tube to form a solid, slag-free pin every time. In operation, the pin tube is held in a simple spring holder. The molten metal is removed from the furnace, killed, and the slag is pushed aside.  The pin tube is immediately inserted into the molten metal at an angle of 45 degrees until the thin walled bulb section is completely immersed.  This opens the glass and fills the pin tube. Standard, precision, and high vacuum pin tubes are available. Every tube tested before supply and well packed in thermocol ensure non-breakage.
For specific applications , do not hesitate to contact us : products can be developed on request.