Card sleeve needle valve to cut off or regulate flow.

FD-LOK Inconel needle valves sleeve needle-like, along the flow direction of the movement, changed the flow cross-sectional area, adjust the gas flow, is now fine-tuning of the valve requires the valve port open gradually become larger, if the maximum energy from the closed to the open continuous finely adjusted. Such a card sleeve needle valve seal PTFE sealing materials, copper seals, carbide seal; and now according to different pressures, different temperatures, using a FD-LOK Needle valve structure and corresponding seal, so that you can ensure that the valve leak does not happen in the state of work pressure, then the seal is not deformed at the appropriate temperature under such conditions, under the premise of no deformation Mifengbuyan phenomenon does not occur.