How to repair and maintenance and the rubber fluorine pneumatic valve installation method

, fluorine-butterfly pneumatic valve flange cover plate can't open, unless you are ready to connected to the pipe line, otherwise PTFE flange surface may be caused by temperature difference, foreign bodies, knock against scratches or distortion and seal, such as moving cover board for inspection need, also must stay speed will cover plate to reset after inspection, in order to protect the PTFE flange surface.
, fluorine-butterfly pneumatic valve and pipeline connection, and is no longer used alone gasket commonly, but with dissimilar materials ( Metal surface such as flange, should adopt appropriate gaskets, PTFE in order to protect the flange surface.
, fluorine-butterfly pneumatic valves in the system to use, such as leak under high temperature, shall, first of all, the system temperature down to room temperature, then find out the reason, for repair.
and does not allow for lining fluorine pneumatic valves do any high temperature of welding work, so as not to cause permanent damage to the lining layer.
, flange nut when installation should be according to the diagonal direction ( Symmetrical uniform tightening in turn and with appropriate moment:
if a flange sealing surface leakage, and leakage location nut has been lock, at this time should be relaxed leak location nut, half a circle it to side with the same torque lock again.
b if the above method is still not stop leakage, PTFE should check if there is a concave and convex flange surface indentation, scratch, which can be spun yarn paper, cloth leveling to reconnect.
, fluorine-butterfly pneumatic valve should be stored in dry and ventilated room, do not stack.
, after repair the lining fluorine pneumatic valve before use according to the related standard test qualified before installation.
, manual operation of the pneumatic valve fluorine-butterfly, does not allow the other lever strength forced open and close the pneumatic valve.
, there is a requirement for directional lining fluorine pneumatic valve when installation should pay attention to the flow of medium should be qi, move the direction indicated by the arrows on the valve body, and ensure the operation, maintenance is convenient.
and long-term storage of the pneumatic valve fluorine-butterfly its seal should raise separation condition, avoid sealing surface compression permanent deformation for a long time, affect the sealing performance and service life.